+publisher:"Texas A&M University" +contributor:("Hassan, Yassin A.")

Texas A&M University

1. Fullerton, Christopher Todd. Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing.

Degree: MS, Nuclear Engineering, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/165685

► In the event that a nuclear core cooling pipe ruptures, a loss of coolant accident (LOCA) scenario begins. Precipitates from dissolved ions can form and… (more)

▼ In the event that a nuclear core cooling pipe ruptures, a loss of coolant accident (LOCA) scenario begins. Precipitates from dissolved ions can form and cause the emergency backup pumps to fail. Two aluminum products, an aluminum oxyhydroxide (AlOOH) and aluminum oxide solid are expected to have the greatest impact on debris bed formation. The objective of this experimental study was to classify these compounds by size, structure, and behavioral characteristics, and compare them to a benchtop salt generated precipitate made with aluminum nitrate nonahydrate. The source of the aluminum ions varies by plant, but they typically originate from corrosion of structures in the reactor containment environment. Characterizing the aluminum corrosion product is necessary to determine if an aluminum surrogate salt precipitate product can be substituted in the Nuclear Regulatory Commission?s (NRC) generic safety issue-191 (GSI-191) head loss testing to simplify testing procedures. If the surrogate salt product is comparable to the alloy corrosion product, it will simplify the task of studying sump strainer debris bed formation in future testing. The representative post LOCA coolant solution for this experimental study was created at varying pH?s representative of containment chemistry. Aluminum samples were corroded at 85? ? 2? until the solubility limit was reached. The aluminum source was removed and the solution was cooled to 25? at three different cooling rates. The resulting solution was analyzed for turbidity, particle size, TEM, XRD, and settling characteristics. These results are compared to an aluminum nitrate nonahydrate surrogate salt precipitate prepared according to industry standards and regulations. The characterization of the precipitates proved to be dependent on corrosion pH, aluminum ion concentration, and cooling rate. The cooling rate dynamics indicate a higher probability of large precipitate formation during slow cooling rates and smaller particle formation during rapid cooling rates. The quantity of particles generated was assessed with solution turbidity. The solutions with higher concentrations of aluminum ions resulted in higher solution turbidity. The AlOOH precipitates from the Al(NO3)3?9H2O salt solution were determined to be a suitable substitute for further head loss testing in the chemical GSI-191 project. Advisors/Committee Members: Hassan, Yassin A (advisor), Vaghetto, Rodolfo (advisor), King, Maria (committee member).

Subjects/Keywords: GSI-191; Alumina; Corrosion; Sodium Tetraborate (NaTB); Loss of Coolant Accident (LOCA); PWR; BWR

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APA (6^th Edition):

Fullerton, C. T. (2017). Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/165685

Chicago Manual of Style (16^th Edition):

Fullerton, Christopher Todd. “Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing.” 2017. Masters Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/165685.

MLA Handbook (7^th Edition):

Fullerton, Christopher Todd. “Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing.” 2017. Web. 14 Oct 2019.

Vancouver:

Fullerton CT. Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/165685.

Council of Science Editors:

Fullerton CT. Characterization of Aluminum Corrosion Precipitates in Support of GSI-191 Head Loss Testing. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/165685

Texas A&M University

2. Budd, John Layne. Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility.

Degree: MS, Mechanical Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/156798

► To further efforts for studying the TAMU air-cooled Reactor Cavity Cooling System (RCCS) experimental test facility, Laser Doppler Velocimetry (LDV) experiments have been conducted to… (more)

▼ To further efforts for studying the TAMU air-cooled Reactor Cavity Cooling System (RCCS) experimental test facility, Laser Doppler Velocimetry (LDV) experiments have been conducted to acquire data on the instantaneous streamwise and spanwise components of velocity at various locations inside the upper plenum. These experiments were performed under steady-state conditions, both heated and adiabatic, using four active risers. The apparatus used for data acquisition consisted primarily of a 2-D laser head mounted onto a 3-D traverse system. Olive oil particles with an average diameter of 0.745 ?m were utilized for seeding the flow. The data from these experiments has been necessary for characterizing the experimental facility by verifying the system?s repeatability and performance. In addition, LDV measurements have provided means of comparison for previously acquired PIV measurements. The compared parameters include the streamwise velocity component, as well as the streamwise and spanwise components of the turbulent intensity and the Reynolds stresses. Based on these comparisons, several differences were found between the two techniques. First, the PIV turbulent statistics did not generally agree well with those of the LDV measurements. However, data points located at regions of higher elevation tended to have better agreement. These higher regions are characterized by velocity gradients significantly smaller than those found at lower elevations. This fact may aid in explaining the discrepancies between the techniques, since PIV is known to underperform on regions with high velocity gradients. In addition, it is suspected that the number of samples for PIV, 150 in total, were insufficient for obtaining reasonable statistics. This is in contrast to LDV, which had 1500 samples per data point. Second, the comparison between the techniques appear to agree better for the adiabatic case than the heated case. Since the heated case has additional turbulence fluctuations induced by thermal mixing, this may have hindered the PIV measurements. Third, the turbulence intensities were consistently overestimated by PIV. This led to the conclusion that the PIV data contained significantly more noise than LDV data. Aside from comparisons between the two techniques, several experiments were conducted to test the repeatability and accuracy of the LDV measurements. It was found that the LDV measurements exhibited good accuracy and a high level of repeatability. Throughout these measurements, the standard deviation percentage was found to be no greater than 10%. More importantly, when averaging the values of all data points at each respective each elevation, the average value ranged between 2.2% and 3.5%. Advisors/Committee Members: Hassan, Yassin A. (advisor), Marlow, William H. (advisor), King, Maria D. (advisor).

Subjects/Keywords: Reactor Cavity Cooling System; Passive Safety System; Laser Doppler Velocimetry; Particle Image Velocimetry

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Budd, J. L. (2016). Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156798

Chicago Manual of Style (16^th Edition):

Budd, John Layne. “Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility.” 2016. Masters Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/156798.

MLA Handbook (7^th Edition):

Budd, John Layne. “Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility.” 2016. Web. 14 Oct 2019.

Vancouver:

Budd JL. Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/156798.

Council of Science Editors:

Budd JL. Comparison between Particle Image Velocimetry and Laser Doppler Velocimetry Measurements inside the TAMU Reactor Cavity Cooling System Experimental Test Facility. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/156798

Texas A&M University

3. Kappes, Matthew Jareb. Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155627

► During a LOCA in a LWR, a containment-sump strainer filters debris, generated from fibrous thermal insulation, from the water collected in the containment sump. The… (more)

▼ During a LOCA in a LWR, a containment-sump strainer filters debris, generated from fibrous thermal insulation, from the water collected in the containment sump. The buildup of debris on the strainer and the bypass of debris through the strainer lead to upstream and downstream effects, respectively. The objective of this research was to create a methodology for obtaining PSDs for this debris upstream and downstream of a sump strainer in multiple size ranges. Fibrous debris was injected into an experimental facility which simulated the conditions in a LWR containment sump. Samples were taken downstream of the strainer during the experiment. Using a NanoSight LM10 and two optical microscope systems, size measurements of particles were made. The fractional number of particles between 55-188 nm increased from 0.591 to 0.734 upstream to downstream; the number of all other particle sizes decreased. This trend is consistent with Hutten?s [8] statements about the MPPS. For AMIS-1, from upstream to downstream, the fraction of particles smaller than 55 ?m increased from 0.77 to 0.89; almost all of the larger particles sizes decreased in number. This demonstrates larger particles being more efficiently filtered. For AMIS-2, from upstream to downstream, the fraction of particles smaller than 340 ?m increased from 0.536 to 0.668; all of the larger particle sizes decreased in number. This again demonstrates higher filtration efficiency for larger particles. Different PDFs provided the best fit for the PSDs in each of the size ranges measured. For the nanometer range, the Johnson?s SB function provided the best fit. For the 10-500 ?m range, the upstream and downstream results were fit best with the log-logistic and lognormal functions, respectively. For the 100-2500 ?m size range, the Weibull distribution was found to fit best. Changes in the PDFs fit to the upstream and downstream PSDs were similar to what was found when comparing the upstream and downstream PSD histograms. Size distributions for spherical (tin powder) and angular (SiC F600) particles were easily obtained using the Coulter Counter, however, it didn?t provide reliable results for fibrous debris. Advisors/Committee Members: Hassan, Yassin A. (advisor), Marlow, William H. (committee member), King, Maria D. (committee member).

Subjects/Keywords: LOCA; containment sump; strainer; debris bypass; fibrous debris; particle size distribution; fibrous porous media

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APA (6^th Edition):

Kappes, M. J. (2015). Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155627

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kappes, Matthew Jareb. “Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor.” 2015. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/155627.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kappes, Matthew Jareb. “Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor.” 2015. Web. 14 Oct 2019.

Vancouver:

Kappes MJ. Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/155627.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kappes MJ. Particle Size Distributions of Debris Upstream and Downstream of the Containment Sump Strainer in a Light Water Reactor. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155627

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

4. Cook, William McKinley. Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/158626

► This thesis work involves the use of the RELAP5-3D thermal hydraulic code to model flow for a typical pressurized water reactor (PWR). A model using… (more)

Subjects/Keywords: RELAP; RELAP5-3D; PWR; GSI-191; Three-Dimensional Nodalization; LOCA; Thermal Hydraulics; Nuclear Reactor; Safety Analysis

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APA (6^th Edition):

Cook, W. M. (2014). Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158626

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cook, William McKinley. “Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D.” 2014. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/158626.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cook, William McKinley. “Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D.” 2014. Web. 14 Oct 2019.

Vancouver:

Cook WM. Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/158626.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cook WM. Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/158626

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

5. Kyriakopoulos, Vasileios. Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed.

Degree: 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/159105

► This thesis examines five chemical solutions that are considered to be representative of the solution created in the containment sump during a postulated LOCA (loss… (more)

Subjects/Keywords: GSI-191; strainer; PWR; nuclear

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APA (6^th Edition):

Kyriakopoulos, V. (2016). Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/159105

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kyriakopoulos, Vasileios. “Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed.” 2016. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/159105.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kyriakopoulos, Vasileios. “Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed.” 2016. Web. 14 Oct 2019.

Vancouver:

Kyriakopoulos V. Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed. [Internet] [Thesis]. Texas A&M University; 2016. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/159105.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kyriakopoulos V. Effect of Chemical Injections on Pressure Drop through a Fibrous Debris Bed. [Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/159105

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

6. Silberberg, Mark Bryan. Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161400

► A simplified high temperature gas-cooled reactor building was developed at Texas A&M University to understand the response of an actual facility to a depressurization accident… (more)

▼ A simplified high temperature gas-cooled reactor building was developed at Texas A&M University to understand the response of an actual facility to a depressurization accident scenario. A set of scaling laws were established to preserve the major flow phenomena and the geometry of the facility was simplified to focus on characterizing the key phenomena that determine the reactor building atmospheric concentration over time without the complexity of modeling the detailed features of an actual reactor building. The facility was outfitted with several instruments to measure localized oxygen concertation, pressure and temperature with the flexibility for the addition of measurement devices for future testing. The design of the facility required computing the leak rate scaled to the amount of air leaked from the prototype facility in one day. After determining the target leak rate the facility leak paths were acclimated to allow for air to leak from the facility. This was achieved by adjusting a set of needle valves at select locations on the simplified facility. Comparison of the achieved leak rate with an analytical fit to the model was shown to have a high degree of statistical similitude from determination of the R² values. The analytical model was determined by assuming the helium and air inside the faculty behave as an ideal gas. Finally, several tests were conducted to characterize the phenomena for a sudden depressurization inside of the simplified test facility. The velocity in the flow path connecting two adjoining test volumes was determined from the response of the oxygen probes to air intrusion into the facility. Finally, PIV measurements were conducted to analyze a helium buoyant jet flowing through a check valve that operates at 1 psid. Temporal resolution of the velocity field displayed erratic behavior in the region downstream of the inlet near the steam generator wall and was suspected to be from the development of flow instabilities from the difference in density between the helium jet and air. Entrainment effects were hypothesized to have occurred due to Rayleigh-Taylor instabilities that resulted in the development of vortical structures and local acceleration of the flow field. Advisors/Committee Members: Hassan, Yassin A (advisor), Morrison, Gerald L (committee member), King, Maria D (committee member).

Subjects/Keywords: High Temperature Gas-Cooled Reactor; PIV; NGNP

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APA (6^th Edition):

Silberberg, M. B. (2017). Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Silberberg, Mark Bryan. “Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building.” 2017. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/161400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Silberberg, Mark Bryan. “Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building.” 2017. Web. 14 Oct 2019.

Vancouver:

Silberberg MB. Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/161400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silberberg MB. Design and Preliminary Measurements Inside a Simplified High Temperature Gas-Cooled Reactor Building. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

7. Chu, Hung-Chieh. Application of the Fictitious Domain Method to Flow Problems with Complex Geometries.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161671

► In this study, in order to address the immersed boundary condition, which was the critical issue regarding the fictitious domain method, two new strategies for… (more)

Subjects/Keywords: Fictitious domain method; FEM

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APA (6^th Edition):

Chu, H. (2017). Application of the Fictitious Domain Method to Flow Problems with Complex Geometries. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161671

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chu, Hung-Chieh. “Application of the Fictitious Domain Method to Flow Problems with Complex Geometries.” 2017. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/161671.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chu, Hung-Chieh. “Application of the Fictitious Domain Method to Flow Problems with Complex Geometries.” 2017. Web. 14 Oct 2019.

Vancouver:

Chu H. Application of the Fictitious Domain Method to Flow Problems with Complex Geometries. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/161671.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chu H. Application of the Fictitious Domain Method to Flow Problems with Complex Geometries. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161671

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

8. Gauntt, Stephen Byron. Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2538

► Prediction of bubble formation during filling of microchambers is often critical for determining the efficacy of microfluidic devices in various applications. In this study experimental… (more)

Subjects/Keywords: microfluidics; macromodel; behavioral model; microchamber; capillary driven flow

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APA (6^th Edition):

Gauntt, S. B. (2009). Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2538

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gauntt, Stephen Byron. “Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics.” 2009. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2538.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gauntt, Stephen Byron. “Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics.” 2009. Web. 14 Oct 2019.

Vancouver:

Gauntt SB. Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2538.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gauntt SB. Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2538

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

9. Baehl, Michael Matthew. Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2380

► New bioaerosol sampling inlets were designed and tested that have nominal exhaust flow rates of 100 L/min to 400 L/min, and which have internal fractionators… (more)

Subjects/Keywords: Aerosol; Inlets

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APA (6^th Edition):

Baehl, M. M. (2009). Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2380

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Baehl, Michael Matthew. “Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min.” 2009. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2380.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Baehl, Michael Matthew. “Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min.” 2009. Web. 14 Oct 2019.

Vancouver:

Baehl MM. Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2380.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Baehl MM. Ambient aerosol sampling inlet for flow rates of 100 and 400 l/min. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2380

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

10. Gaskill, Travis. Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10585

► The present study has focused on the use of coil heat exchangers (CHEs) with microencapsulated phase change material (MPCM) slurries to understand if CHEs can… (more)

Subjects/Keywords: Heat Transfer; Heat Exchanger; Helical Coil; Microencapsulated Phase Change Material

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APA (6^th Edition):

Gaskill, T. (2012). Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10585

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gaskill, Travis. “Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10585.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gaskill, Travis. “Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry.” 2012. Web. 14 Oct 2019.

Vancouver:

Gaskill T. Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10585.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gaskill T. Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10585

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

11. Lakshmipathy, Sathish Kumar. VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11188

► Improving core performance by reshuffling/reloading the fuel blocks within the core is one of the in-core fuel management methods with two major benefits: a possibility… (more)

▼ Improving core performance by reshuffling/reloading the fuel blocks within the core is one of the in-core fuel management methods with two major benefits: a possibility to improve core life and increase core safety. VHTR is a hexagonal annular core reactor with reflectors in the center and outside the fuel rings (3-rings). With the block type fuel assemblies, there is an opportunity for muti-dimensional fuel bocks movement within the core during scheduled reactor refueling operations. As the core is symmetric, by optimizing the shuffle operation of 1/6th of the core, the same process can be repeated through the remaining 5/6th of the core. VHTR has 170 fuel blocks in the core of which 50 are control rod blocks and are not movable to regular fuel block locations. The reshuffling problem now is to find the best combination of 120 fuel blocks that has a minimized power peaking and/or increased core life under safety constraints among the 120! combinations. For evaluating each LP during the shuffling, a fitness function that is developed from the parameters affecting the power peaking and core life is required. Calculating the power peaking at each step using Monte Carlo simulations on a whole core exact geometry model is a time consuming process and not feasible. A parameter is developed from the definitions of reactivity and power peaking factor called the localized reactivity potential that can be estimated for every block movement based on the reaction rates and atom densities of the initial core burnup at the time of shuffling. The algorithm (ReloPSO) is based on Particle Swarm Optimization algorithm the search process by improving towards the optimum from a set of random LPs based on the fitness function developed with the reactivity potential parameter. The algorithm works as expected and the output obtained has a flatter reactivity profile than the input. The core criticality is found to increase when shuffled closer to end of life. Detailed analysis on the burn runs after shuffling at different time of core operation is required to correlate the estimated and actual values of the reactivity parameter and to optimize the time of shuffle. Advisors/Committee Members: Tsvetkov, Pavel V. (advisor), Hassan, Yassin A. (committee member), Curry, Guy L. (committee member).

Subjects/Keywords: Particle Swarm Optimization; Core shuffling optimization

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lakshmipathy, S. K. (2012). VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11188

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lakshmipathy, Sathish Kumar. “VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11188.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lakshmipathy, Sathish Kumar. “VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D.” 2012. Web. 14 Oct 2019.

Vancouver:

Lakshmipathy SK. VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11188.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lakshmipathy SK. VHTR Core Shuffling Algorithm Using Particle Swarm Optimization ReloPSO-3D. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11188

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

12. Vaghetto, Rodolfo. Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9225

► An experimental activity was performed to observe and study the effects of graphite dispersion and deposition on thermal hydraulic phenomena in a Reactor Cavity Cooling… (more)

Subjects/Keywords: Reactor Cavity Cooling System; Radiation Heat Transfer; Graphite Dispersion

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APA (6^th Edition):

Vaghetto, R. (2012). Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9225

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vaghetto, Rodolfo. “Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9225.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vaghetto, Rodolfo. “Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion.” 2012. Web. 14 Oct 2019.

Vancouver:

Vaghetto R. Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9225.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vaghetto R. Experimental Study of the Thermal-Hydraulic Phenomena in the Reactor Cavity Cooling System and Analysis of the Effects of Graphite Dispersion. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9225

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

13. Capone, Luigi. CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11404

► The analysis of the turbulent flows in nuclear fuel bundles is a very interesting task to optimize the efficiency of modern nuclear power plants. The… (more)

Subjects/Keywords: Spacer Grids; Mixing Vanes; Momentum Sources; Source Forcing Method, CFD

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APA (6^th Edition):

Capone, L. (2012). CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11404

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Capone, Luigi. “CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11404.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Capone, Luigi. “CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors.” 2012. Web. 14 Oct 2019.

Vancouver:

Capone L. CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11404.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Capone L. CFD Analysis of Nuclear Fuel Bundles and Spacer Grids for PWR Reactors. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11404

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

14. Khan, Abdul. Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11730

► In this study, the phenomenon of two-phase flow was investigated in a square channel. The experiment was performed with stagnant liquid conditions. The gas and… (more)

Subjects/Keywords: Optical Probe; Shadowgraphy; PTV; Tracking Algorithm; Bubbly Flow; Two Phase Flow

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APA (6^th Edition):

Khan, A. (2012). Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11730

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khan, Abdul. “Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11730.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khan, Abdul. “Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm.” 2012. Web. 14 Oct 2019.

Vancouver:

Khan A. Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11730.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khan A. Bubbly Flow Experiment in Channel Using an Optical Probe and Tracking Algorithm. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11730

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

15. Esquivel, Jason. Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-234

► In the wake of global warming and fossil fuel depletion, renewed attention has been paid to shifting away from the use of petroleum based fuels.… (more)

Subjects/Keywords: Biodiesel; Performance Characterization

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APA (6^th Edition):

Esquivel, J. (2010). Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Esquivel, Jason. “Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels.” 2010. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Esquivel, Jason. “Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels.” 2010. Web. 14 Oct 2019.

Vancouver:

Esquivel J. Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-234.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Esquivel J. Performance Characterization of a Medium-Duty Diesel Engine with Bio-Diesel and Petroleum Diesel Fuels. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-234

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

16. Wang, Huhu 1985-. CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148310

► Very High Temperature Rector (VHTR) had been designated as one of those promising reactors for the Next Generation (IV) Nuclear Plant (NGNP). For a prismatic… (more)

▼ Very High Temperature Rector (VHTR) had been designated as one of those promising reactors for the Next Generation (IV) Nuclear Plant (NGNP). For a prismatic core VHTR, one of the most crucial design considerations is the bypass flow and crossflow effect. The bypass flow occurs when the coolant flow into gaps between fuel blocks. These gaps are formed as a result of carbon expansion and shrinkage induced by radiations and manufacturing and installation errors. Hot spots may appear in the core if the large portion of the coolant flows into bypass gaps instead of coolant channels in which the cooling efficiency is much higher. A preliminary three dimensional steady-state CFD analysis was performed with commercial code STARCCM+ 6.04 to investigate the bypass flow and crossflow phenomenon in the prismatic VHTR core. The k-? turbulence model was selected because of its robustness and low computational cost with respect to a decent accuracy for varied flow patterns. The wall treatment used in the present work is two-layer all y+ wall treatment to blend the wall laws to estimate the shear stress. Uniform mass flow rate was chose as the inlet condition and the outlet condition was zero gauge pressure outlet. Grid independence study was performed and the results indicated that the discrepancy of the solution due to the mesh density was within 2% of the bypass flow fraction. The computational results showed that the bypass flow fraction was around 12%. Furthermore, the presence of the crossflow gap resulted in a up to 28% reduction of the coolant in the bypass flow gap while mass flow rate of coolant in coolant channels increased by around 5%. The pressure drop at the inlet due to the sudden contraction in area could be around 1kpa while the value was about 180 Pa around the crossflow gap region. The error analysis was also performed to evaluate the accumulated errors from the process of discretization and iteration. It was found that the total error was around 4% and the variation for the bypass flow fraction was within 1%. Advisors/Committee Members: Hassan, Yassin A (advisor), Marlow, William H (committee member), Chen, Hamn-Ching (committee member).

Subjects/Keywords: Crossflow; Bypass flow; Prismatic VHTR

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APA (6^th Edition):

Wang, H. 1. (2012). CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148310

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Huhu 1985-. “CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/148310.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Huhu 1985-. “CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor.” 2012. Web. 14 Oct 2019.

Vancouver:

Wang H1. CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/148310.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang H1. CFD Analysis of Core Bypass Flow and Crossflow in the Prismatic Very High Temperature Gas-cooled Nuclear Reactor. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148310

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

17. Rodriguez, Oscar. RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes.

Degree: 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/148410

► RELAP5-3D has been coupled with both DAKOTA and STAR-CCM+ in order to expand the capability of the thermal-hydraulic code and facilitate complex studies of desired… (more)

▼ RELAP5-3D has been coupled with both DAKOTA and STAR-CCM+ in order to expand the capability of the thermal-hydraulic code and facilitate complex studies of desired systems. In the first study, RELAP5-3D was coupled with DAKOTA to perform a sensitivity study of the South Texas Project (STP) power plant during steady-state and transient scenarios. The coupled software was validated by analyzing the simulation results with respect of the physical expectations and behavior of the power plant, and thermal-hydraulic parameters which caused greatest sensitivity where identified: inlet core temperature and reactor thermal power. These variables, along with break size and discharge coefficients, were used for further investigation of the sensitivity of the RELAP5-3D LOCA transient simulation under three difference cases: two inch break, six inch break, and guillotine break. Reactor thermal power, core inlet temperature, and break size were identified as producing the greatest sensitivity; therefore, future research would include uncertainty quantification for these parameters. In the second study, a small scale experimental facility, designed to study the thermal hydraulic phenomena of the Reactor Cavity Cooling System (RCCS) for a Very High Temperature Reactor (VHTR), was used as a model to test the capabilities of coupling Star-CCM+ and RELAP5-3D. This chapter discusses the capabilities and limitations of the STAR-CCM+/RELAP5-3D coupling, and a simulation, on the RCCS facility, was performed using STAR-CCM+ to study the flow patterns where expected complex flow phenomena occur and RELAP5-3D for the complete system. The code showed inability to perform flow coupling simulations and it is unable, at this time, to handle closed loop systems. The thermal coupling simulation was successful and showed congruent qualitative results to physical expectations. The locations of large fluid vortices were located specifically in the pipes closest to the inlet of the bottom manifold. In conclusion, simulations using coupled codes were presented which greatly improved the capabilities of RELAP5-3D stand-alone and computational time required to perform complex thermal-hydraulic studies. These improvements show greatly benefit for industrial applications in order to perform large scale thermal-hydraulic systems studies with greater accuracy while minimizing simulation time. Advisors/Committee Members: Hassan, Yassin A (advisor), Marlow, William H (advisor), Jacobs, Timothy J (committee member).

Subjects/Keywords: Nuclear CFD; thermal hydraulics

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APA (6^th Edition):

Rodriguez, O. (2012). RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/148410

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rodriguez, Oscar. “RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes.” 2012. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/148410.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rodriguez, Oscar. “RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes.” 2012. Web. 14 Oct 2019.

Vancouver:

Rodriguez O. RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes. [Internet] [Thesis]. Texas A&M University; 2012. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/148410.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rodriguez O. RELAP5-3D Thermal Hydraulics Computer Program Analysis Coupled with DAKOTA and STAR-CCM+ Codes. [Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/148410

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

18. Reyes, Denny L. Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151280

► In a pressurized water reactor (PWR), pressurized water flows over fuel rods containing radioactive uranium. Potential failure of these nuclear fuel rods is a primary… (more)

Subjects/Keywords: PTV; particle tracking velocimetry; rod bundle

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APA (6^th Edition):

Reyes, D. L. (2013). Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Reyes, Denny L. “Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry.” 2013. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/151280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Reyes, Denny L. “Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry.” 2013. Web. 14 Oct 2019.

Vancouver:

Reyes DL. Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/151280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Reyes DL. Three-Dimensional Velocity Measurement Reconstruction for a Rod Bundle Array using Matched Refractive Index Particle Tracking Velocimetry. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

19. Cevik, Muhammet. Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151651

► The performance of a coupled slotted orifice and swirl flow meters, and a coupled slotted orifice and an impedance probe flow meter for multiphase flow… (more)

Subjects/Keywords: multiphase flow meter; slotted plate; swirl-meter; electrical impedance probe

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APA (6^th Edition):

Cevik, M. (2013). Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151651

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cevik, Muhammet. “Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow.” 2013. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/151651.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cevik, Muhammet. “Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow.” 2013. Web. 14 Oct 2019.

Vancouver:

Cevik M. Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/151651.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cevik M. Evaluation of a Close Coupled Slotted Orifice, Electrical Impedance, and Swirl Flow Meters for Multiphase Flow. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151651

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

20. Larsen, Benjamin A. Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152740

► The current knowledge of flow parameters for terrestrial two-phase flow was developed through experiments that collected hundreds to thousands of data points. However, the cost… (more)

Subjects/Keywords: Drift Flux; Two-Phase Flow; Microgravity; Slug Flow

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APA (6^th Edition):

Larsen, B. A. (2014). Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Larsen, Benjamin A. “Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model.” 2014. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/152740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Larsen, Benjamin A. “Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model.” 2014. Web. 14 Oct 2019.

Vancouver:

Larsen BA. Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/152740.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Larsen BA. Statistical Analysis of Microgravity Two-Phase Slug Flow via the Drift Flux Model. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152740

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

21. Abdulsattar, Suhaeb S. Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152832

► Safety related issues in Nuclear Power Plants (NPPs) have always been of concern, especially those issues that are related to Light Water Reactors (LWRs) and… (more)

▼ Safety related issues in Nuclear Power Plants (NPPs) have always been of concern, especially those issues that are related to Light Water Reactors (LWRs) and their Design Basis Accidents (DBA). One of the ongoing issues that has been extensively studied is the Generic Safety Issue GSI-191, which is dedicated to study and resolve the issues that arise after a Loss-Of-Coolant-Accident (LOCA). Fibrous debris produced during the blow-down phase of Loss-of-Coolant Accidents is transported into the sump and becomes an important cause of head loss through the sump strainer, affecting the Emergency Core Cooling System (ECCS) performance. This study was dedicated to measure the pressure drop across randomly accumulated debris bed on the sump strainer along with measuring the debris bed thickness. Two different types of strainers were installed vertically, one at a time, in a horizontal flow loop and the debris bed thickness was measured during the bed build up process and after reaching steady state. Fifteen tests were conducted to determine the head loss difference between the two strainers and to study the characteristics of the debris bed accumulated on each strainer. The results from this experimental study were compared based on the approaching velocity, debris bed thickness, and strainer type. A realistic permeability model for the NUKON fiber glass insulation material was suggested, to be utilized in related applications, the suggested head loss model was compared to other head loss models developed in previous studies. The permeability model was developed from experimental data acquired from approaching velocities in the viscous region. There was no significant head loss difference between the two strainers for the minimum and intermediate range. Based on the experimental data, the head loss difference between the two strainers for the maximum range was about four times higher than the calculated head loss. The flow rate measurement uncertainty was main reason for the difference in the maximum range. There is a probability that the debris bypass could be different between the two strainers, thus, a debris bypass study is required to further investigate this difference. Advisors/Committee Members: Hassan, Yassin A (advisor), Marlow, William H (committee member), Ugaz, Victor M (committee member).

Subjects/Keywords: Fibrous debris; Head loss; Sump strainer; Perforated Strainer; Porous media; Permeability; Kozeny constant; Loss-Of-Coolant-Accident (LOCA); NUKON fiber glass insulation; Generic Safety Issue GSI-191

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APA (6^th Edition):

Abdulsattar, S. S. (2014). Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abdulsattar, Suhaeb S. “Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers.” 2014. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/152832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abdulsattar, Suhaeb S. “Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers.” 2014. Web. 14 Oct 2019.

Vancouver:

Abdulsattar SS. Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/152832.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abdulsattar SS. Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152832

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

22. Hsu, Chia-Hsiang. Enhancement of Pool Boiling Heat Transfer in Confined Space.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/152843

► Pool boiling is an effective method used in many technical applications for a long time. Its highly efficient heat transfer performance results from not only… (more)

▼ Pool boiling is an effective method used in many technical applications for a long time. Its highly efficient heat transfer performance results from not only the convection effect but also the phase change process in pool boiling. Pool boiling enhancement has been studied in the past decade. However, the mechanisms of pool boiling has not yet been fully understood because of the many parameters that affect its behavior including the latent heat of vaporization, nucleation density, bubble and fluid motion, interaction at the interface, and the physical properties of surface. Among the current studies, bubble departure rate is viewed as one of the dominant factors that affect heat transfer. This research considers the effect of bubble confinement on pool boiling. In the study, confinement was achieved by placing a flat plate over heated surface. The flat plate has a hole in the middle, and there is a gap between the flat plate and the heater. The diameters of hole are 2 mm, 3 mm, and 4 mm; the gap distances are 2.3 mm, 3.6 mm, and 5 mm. The heater consists of an indium-tin-oxide layer deposited on a silicon wafer. An IR camera and high speed cameras are used to acquire the surface temperature distribution and bubble image. By controlling the plate hole size and the gap distance, the effect of confinement on heat transfer performance can be evaluated. Moreover, heat transfer performance of pool boiling with three-2mm-holes plate was investigated and compared with that of single-2mm-hole plate with the smallest gap size. At the lower heat flux values, heat transfer enhancement in confined space was experimentally observed. Surface temperature can be reduced by 4 ?C at most. Results indicate that higher bubble departure rate and coalescence effect might be the dominant factor for improving heat transfer performance in a confined space caused by induced shear flow. Advisors/Committee Members: Alvarado, Jorge L. (advisor), Hassan, Yassin A. (committee member), Banerjee, Debjyoti (committee member).

Subjects/Keywords: Pool boiling; Confined space

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APA (6^th Edition):

Hsu, C. (2014). Enhancement of Pool Boiling Heat Transfer in Confined Space. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hsu, Chia-Hsiang. “Enhancement of Pool Boiling Heat Transfer in Confined Space.” 2014. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/152843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hsu, Chia-Hsiang. “Enhancement of Pool Boiling Heat Transfer in Confined Space.” 2014. Web. 14 Oct 2019.

Vancouver:

Hsu C. Enhancement of Pool Boiling Heat Transfer in Confined Space. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/152843.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hsu C. Enhancement of Pool Boiling Heat Transfer in Confined Space. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152843

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

23. Chance, Christopher. Partial Core Blockage Simulation Using COBRA-TF.

Degree: 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153903

► COBRA?TF (CTF) was used to simulate the cooling capabilities for two reactor types that undergo different blockage scenarios. One case considered is a pool-type TRIGA… (more)

▼ COBRA?TF (CTF) was used to simulate the cooling capabilities for two reactor types that undergo different blockage scenarios. One case considered is a pool-type TRIGA reactor in which instrumentation tubes were inserted into existing coolant channels. The inclusion of the instrumentation tubes reduces the available coolant flow area, requiring an investigation of fuel coolability. The second case considered a pressurized water reactor (PWR) that has experienced a loss of coolant accident. Debris not stopped by the sump strainer can be deposited at the inlet of the core, creating blockage at the inlet of select assemblies. The blockage at the inlets could create a lack of cooling capability for the blocked assemblies and could result in fuel failure. CTF has not been widely used for testing these scenarios and the results should be compared alongside other simulations performed in STAR-CCM+ and RELAP5-3D. . For the TRIGA reactor simulations, limitations of CTF were discovered such as a lack of natural convection correlations and setbacks with transient simulations. Therefore, steady-state simulations were created based on input data from the Safety Analysis Report for the reactor and data obtained by STAR-CCM+ models of the core. Single pin analyses were conducted on 3 different fuel rods in order to determine if the fuel rods were at risk of overheating from the proposed modifications with the instrumentation tubes. Larger simulations that modeled two different 4x4 arrays of fuel rods within the TRIGA core were used to determine how well the coolant traversed through these areas with the instrumentation tubes inserted. The results for all simulations were compared to STAR-COM+ results from similar models and it was determined that the insertion of the instrumentation tubes in the TRIGA reactor would not be a concern for the safety of the reactor under normal operating conditions. The PWR simulations revealed more limitations of CTF and did not prove fruitful in providing reliable results. The original goal was to employ CTF to model a PWR core in full detail in order to compare the results to the RELAP5-3D model that used a lumped approach. However, we encountered difficulties with CTF, mostly due to issues with transient simulations and parallel processing. Significant improvements were made to CTF over the course of this research and have resulted in a more robust and bug-free version of the code. However, CTF is still being developed and has some remaining hurdles to overcome before it can be used to reliably model the simulations that were planned. This research still continues today and CTF is being used and improved upon to become a more versatile sub-channel analysis code. Advisors/Committee Members: Ragusa, Jean C (advisor), Hassan, Yassin A (advisor), Chen, Hamn-Ching (committee member).

Subjects/Keywords: sub-channel analysis; thermal hydraulics; COBRA-TF

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APA (6^th Edition):

Chance, C. (2014). Partial Core Blockage Simulation Using COBRA-TF. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153903

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chance, Christopher. “Partial Core Blockage Simulation Using COBRA-TF.” 2014. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/153903.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chance, Christopher. “Partial Core Blockage Simulation Using COBRA-TF.” 2014. Web. 14 Oct 2019.

Vancouver:

Chance C. Partial Core Blockage Simulation Using COBRA-TF. [Internet] [Thesis]. Texas A&M University; 2014. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/153903.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chance C. Partial Core Blockage Simulation Using COBRA-TF. [Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153903

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

24. Sarikurt, Fatih Sinan. CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel.

Degree: 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155266

► One of the most important parameters in the analysis of containment safety of the light water reactors during a loss of coolant accident (LOCA) is… (more)

▼ One of the most important parameters in the analysis of containment safety of the light water reactors during a loss of coolant accident (LOCA) is the prediction of the hydrogen concentration. To ensure proper design of the containment to mitigate the fire/explosive risk created by the flammable hydrogen gas, this concentration build up must be analyzed. Lumped parameter (LP) codes are the main tools used in containment thermal-hydraulic analysis. However, they are limited when it comes to scenarios which require higher fidelity analysis of local phenomena. While the use of computational fluid dynamics (CFD) allows for higher fidelity analyses, CFD requires a comprehensive validation study due to turbulence and condensation modeling. During a LOCA accident, the leaked hydrogen from the primary circuit can form a stable stratified layer at the top of the containment building. The formation and erosion of a stratified layer is a challenging numerical problem due to the interaction mechanism of the jet flow with the stratified layer. The OECD-NEA conducted an experiment at the Paul Scherrer Institute (PSI) as a part of the third International Benchmark Study (IBE-3) to investigate the erosion of the stratified layer by a vertical air-helium jet from the bottom of the large vessel. During the experiment, CFD grade experimental data was generated that could be used for comparative studies. In the present study, the experiment is simulated by using the STAR-CCM+ CFD code with various turbulence models including Reynolds-Averaged Navier-Stokes (RANS) models and Large Eddy Simulation (LES). The Realizable k-? and k-? SST showed good agreement with the experimental when predicting the erosion of the stratified layer and global mixing of the gas components. The LES model also showed good agreement for velocity and faster erosion with experimental data, while the cost of the LES simulation was much higher than RANS simulations. The current validation study contributes to the sensitivity analysis of the turbulence models for erosion behavior in the stratified layer. In addition to that, the results of this study will provide a foundation to discuss the feasibility of the CFD code usage in containment level thermal hydraulic analysis. Advisors/Committee Members: Hassan, Yassin A (advisor), Marlow, William H (committee member), King, Maria (committee member).

Subjects/Keywords: buoyancy jet; stratified layer; containment safety; cfd; turbulence

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APA (6^th Edition):

Sarikurt, F. S. (2015). CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155266

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sarikurt, Fatih Sinan. “CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel.” 2015. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/155266.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sarikurt, Fatih Sinan. “CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel.” 2015. Web. 14 Oct 2019.

Vancouver:

Sarikurt FS. CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel. [Internet] [Thesis]. Texas A&M University; 2015. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/155266.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sarikurt FS. CFD Simulations of Erosion of a Stratified Layer by a Buoyant Jet in a Large Vessel. [Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155266

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

25. Spear, Aubrey Alvin. Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel.

Degree: MS, Mechanical Engineering, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/174811

► Government regulations on emission standards and constantly fluctuating fuel availability and prices have led to the need of more readily usable and available models for… (more)

▼ Government regulations on emission standards and constantly fluctuating fuel availability and prices have led to the need of more readily usable and available models for power generating combustors. A common, versatile, power generating combustor is the circulating fluidized bed (CFB) boiler. Waste tire is viewed as a potential fuel in a CFB boiler. Extensive literature review is used to create a model of a CFB boiler. The model is programmed using Microsoft Excel software. The program consists of four major tabs being the ‘Input’, ‘Bed’, ‘Riser’, and ‘Output’ tabs. The ‘Input’ tab consists of appropriate and minimal input parameters to allow for enough variability while not over burdening the user with acquiring large amounts of data. The ‘Bed’ tab describes the instantaneous chemical reactions assumed to take place in the dense bed region of the combustor. The ‘Riser’ tab tracks the time dependent chemical kinetics through a predetermined number of time steps divided evenly throughout the lean riser region of the combustor. The ‘Output’ tab calculates the concentration at the exit of the combustor riser for ten different species important to both combustion and government regulations being CO, H2O, O2, N2, NH3, HCN, SO2, CO2, H2, and NO. With 5,000 chemical kinetics calculation rows, the computation time for varying an input is approximately ten seconds. The model has been validated against an anonymous industrial CFB boiler firing lignite coal fuel resulting in emission concentrations being 22% different or less between the model predictions and the actual emissions when kinetics are slightly modified. The model was also validated against a Babcock and Wilcox pilot/laboratory scale bubbling fluidized bed (BFB) boiler firing subbituminous coal fuel resulting in emission concentrations being 10% different at most between the model predictions and the actual emissions without kinetics modification except for the O2 concentration being off by about 74% due to differences with CFB. The anonymous CFB boiler had fuel switched to waste tire fuel, and 24 inputs were varied as part of a parametric analysis of the fuel to discover emission trends. Advisors/Committee Members: Annamalai, Kalyan (advisor), Petersen, Eric L (committee member), Hassan, Yassin A (committee member).

Subjects/Keywords: Circulating; Fluidized; Bed; Boiler; Model; Emission; Fuel; Tire; Lignite; Coal; Combustion; Power; Generate; Combustor; Waste; Riser; Chemical; Kinetics; Reaction; Concentration; Parametric; Analysis; Computer; Excel; Pyrolysis; Devolatilization; Two-phase; Limestone; Calcination; Sulfation; Volatile; Ash; Residence; Burn; Particle; Terminal; Velocity; Diffusion; Nitrogen; Carbon; Hydrogen; Oxygen; Sulfur; Recirculation; Validation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Spear, A. A. (2015). Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174811

Chicago Manual of Style (16^th Edition):

Spear, Aubrey Alvin. “Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel.” 2015. Masters Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/174811.

MLA Handbook (7^th Edition):

Spear, Aubrey Alvin. “Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel.” 2015. Web. 14 Oct 2019.

Vancouver:

Spear AA. Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/174811.

Council of Science Editors:

Spear AA. Circulating Fluidized Bed Boiler Model for Predicting Emission Levels of Tire Fuel using Base Case of Lignite Fuel. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/174811

Texas A&M University

26. Kappes, Ethan Daniel. Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction.

Degree: MS, Nuclear Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/174370

► Randomly packed pebble bed structures are found in many engineering applications, such as solar thermal batteries, chemical catalytic reactors, fluid refinement and filtering, magnetic refrigerators,… (more)

▼ Randomly packed pebble bed structures are found in many engineering applications, such as solar thermal batteries, chemical catalytic reactors, fluid refinement and filtering, magnetic refrigerators, biological tissues, and pebble bed reactors. The critical challenge of designing and analyzing a packed bed structure especially in the nuclear industry comes from its complex and dynamic geometry. Modeling and understanding the complex flow, heat and mass transfer, and vorticity phenomena within the bed on a micro scale involves in-depth analysis of the interstitial regions that make up its entirety. Unfortunately, complex geometries and randomly connected void spaces within packed beds have hindered efforts to characterize the underlying transport phenomena. Current research lacks analysis and validation against accurate computational fluid dynamics models for randomly packed structures. This lack of understanding prevents proper leveraging of the pebble bed reactor’s passive safety features. Current PIV research that involves randomly packed structures does not also provide a 3-Dimensional (3D) replica of the test bed for verification. Noninvasive measurements coupled with a full 3D test bed replica for computational fluid dynamic verification and validation will lead to a full understanding of the microscopic flow phenomena within pebble bed reactors. Texas A&M University is conducting isothermal experiments of pressure drops, and flow analysis in a randomly packed pebble bed experimental facility to support the research on advanced nuclear reactors. The data collected is expected to be suitable for computational fluid dynamics validation. The design, construction, and collection of shakedown pressure and PIV data with differing pebble to pipe diameter ratios were conducted in efforts to provide needed data on local flow measurements. The use of nonintrusive PIV analysis on a randomly matched index of refraction facility. This approach allows for a non-invasive probe into the flow within packed spheres at the microscopic scales with high temporal and spatial resolutions. Effects of the wall boundary and Reynolds on flow characteristics obtained from the TR-PIV measurements with are presented with high spatial and temporal resolution. Advisors/Committee Members: Hassan, Yassin A (advisor), Vaghetto, Rodolfo (committee member), King, Marie (committee member).

Subjects/Keywords: Pebble Bed Reactor; PIV; MIR; Packed Bed

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APA (6^th Edition):

Kappes, E. D. (2018). Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174370

Chicago Manual of Style (16^th Edition):

Kappes, Ethan Daniel. “Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction.” 2018. Masters Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/174370.

MLA Handbook (7^th Edition):

Kappes, Ethan Daniel. “Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction.” 2018. Web. 14 Oct 2019.

Vancouver:

Kappes ED. Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/174370.

Council of Science Editors:

Kappes ED. Design, Development, and Execution of PIV Measurements on a Randomly Packed Pebble Bed Experimental Facility Using Matched Index of Refraction. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174370

Texas A&M University

27. Mulloy Jr., John Patrick. A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+.

Degree: MS, Nuclear Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/174086

► Computational fluid dynamics (CFD) simulations were conducted using Star CCM+ in order to investigate the mixing characteristics in the cold leg injection region of a… (more)

Subjects/Keywords: RANS; CFD; Pressurized Thermal Shock; Cold Leg Mixing

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APA (6^th Edition):

Mulloy Jr., J. P. (2018). A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174086

Chicago Manual of Style (16^th Edition):

Mulloy Jr., John Patrick. “A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+.” 2018. Masters Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/174086.

MLA Handbook (7^th Edition):

Mulloy Jr., John Patrick. “A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+.” 2018. Web. 14 Oct 2019.

Vancouver:

Mulloy Jr. JP. A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/174086.

Council of Science Editors:

Mulloy Jr. JP. A RANS Analysis of Pressurized Thermal Shock Phenomena in Nuclear Reactor Geometries Using Star CCM+. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174086

Texas A&M University

28. Williams, Todd Andrew. The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer.

Degree: 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/158962

► Public safety has long been one of the chief design concerns for Nuclear Power Plants (NPPs). For this reason, the design of a NPP must… (more)

▼ Public safety has long been one of the chief design concerns for Nuclear Power Plants (NPPs). For this reason, the design of a NPP must include plans for different accident scenarios called Design Basis Accidents (DBAs). One such DBA is called a Loss of Coolant Accident (LOCA); Pressurized Water Reactors (PWRs) are particularly prone to them. In order to better understand the phenomena associated with a LOCA, a great deal of research has been undertaken. In particular, many studies have been done under the designation Generic Safety Issue-191 (GSI-191). GSI-191 seeks to better understand the secondary effects of a LOCA such as the pressure drop and debris bypass of the containment sump strainer and the impact that both can have on the Emergency Core Cooling System (ECCS). The present study was undertaken to build upon previous work that sought to determine whether or not a voltage applied to the sump strainer would affect the amount of fibrous debris bypass. To this end, a vertical strainer made from a perforated steel plate was installed in a horizontal flow loop. A filter bag was installed downstream from the strainer to collect the debris bypass. The fibrous debris was made from one-side baked NUKON fiberglass insulation. Measurements were also taken of the pressure drop across the debris beds. A total of 19 tests were carried out across five different voltages. No significant difference was observed in either the bypass or the pressure drop between the different voltages. The test results may have been affected by the fact that the present study involved water that was cooler than previous studies. The results may have also been affected by leaks in the test section. Furthermore, the use of multiple NUKON mats may also have affected the results. A study on the sensitivity of the debris bypass to kinematic viscosity could help shed some light on the former problem. Advisors/Committee Members: Hassan, Yassin A (advisor), Marlow, William H (committee member), King, Maria D (committee member), Ugaz, Victor M (committee member).

Subjects/Keywords: debris; bypass; GSI-191; NUKON

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APA (6^th Edition):

Williams, T. A. (2016). The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158962

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Williams, Todd Andrew. “The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer.” 2016. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/158962.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Williams, Todd Andrew. “The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer.” 2016. Web. 14 Oct 2019.

Vancouver:

Williams TA. The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer. [Internet] [Thesis]. Texas A&M University; 2016. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/158962.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Williams TA. The Effect of DC Voltage on Fibrous Debris Bypass Through a Containment Sump Strainer. [Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158962

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

29. Zhang, Taolue. Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161290

► Recently, spray cooling heat transfer has received considerable attention due to its ability to dissipate high thermal loads. However, the physical mechanisms of spray cooling… (more)

▼ Recently, spray cooling heat transfer has received considerable attention due to its ability to dissipate high thermal loads. However, the physical mechanisms of spray cooling remain not well-understood due to the complexity of sprays. In order to better understand the underlying physical mechanisms found in spray cooling, a number of studies have been conducted by isolating spray parameters and focusing on well-controlled droplet train impingement cooling schemes. Most of the previous droplet train impingement studies have mainly focused on the thermal performance of single, double and collinearly arranged triple droplet train impingement. In the current study, the heat transfer and hydrodynamic characteristics of various droplet train impingement arrays have been investigated experimentally. A piezo-electric droplet generation system has been designed and constructed, which is capable of producing well-controlled droplet trains arranged in various patterns (single, double, triangulated and hexagonal-arranged droplet trains). A translucent sapphire substrate, which was coated with a thin film ITO (Indium Tin Oxide), has been used as a heater in experiments. Well-calibrated high speed optical camera and IR thermal camera have been used to characterize the hydrodynamics and heat transfer of droplet train impingement. Droplet-induced crown propagation dynamics has been analyzed experimentally. A revised crown propagation model was proposed in the current study, which is capable of predicting the crown base diameter as a function of time. A transition from crown spreading to splashing has been observed by increasing droplet Weber number. Heat transfer measurements show that strong splashing was unfavorable for heat transfer due to the instability of the liquid film. For multiple droplet train impingement, it was found that impact spacing and impingement pattern play significant roles in terms of heat transfer performance. Furthermore, empirical heat transfer correlations have been postulated and fitted using experimental data for various impingement patterns. Results indicate that the postulated correlations are in good agreement with experimental data. Comparisons have been made between droplet train impingement and circular jet impingement for various impingement patterns. It has been found that droplet train impingement leads to much better heat transfer performance than circular jet impingement due to the effective mixing of fluid during droplet impingement process. In summary, the effects of droplet Weber number, impact spacing and impingement pattern on heat transfer and hydrodynamics during droplet train impingement have been explored and elucidated. Advisors/Committee Members: Alvarado, Jorge L (advisor), Sadr, Reza (advisor), Lau, Sai-Chuen (committee member), Hassan, Yassin A (committee member), Pate, Michael (committee member).

Subjects/Keywords: Droplet impingement cooling; Spray cooling; Droplet impingement dynamics; Jet impingement cooling; IR thermal Imaging; High speed imaging; Weber number

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Zhang, T. (2017). Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Taolue. “Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements.” 2017. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/161290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Taolue. “Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements.” 2017. Web. 14 Oct 2019.

Vancouver:

Zhang T. Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/161290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang T. Study of Hydrodynamics and Heat Transfer Induced by Multiple Droplet Train Impingements. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

30. Oh, Sung Hyuk. Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters.

Degree: 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-3198

► Experiments and numerical predictions were conducted to study heat (mass) transfer characteristics in a two-pass trapezoidal channel simulating the cooling passage of a gas turbine… (more)

▼ Experiments and numerical predictions were conducted to study heat (mass) transfer characteristics in a two-pass trapezoidal channel simulating the cooling passage of a gas turbine blade. Three different rib configurations were tested for the air entering the smaller cross section of the trapezoidal channel as well as the larger cross section of the trapezoidal channel at four different Reynolds numbers of 9,400, 16,800, 31,800, and 57,200. (+) 60? ribs, (?) 60? ribs and 60? V-shaped ribs were attached on both the top and bottom walls in parallel sequence. A naphthalene sublimation technique was used, and the heat and mass transfer analogy was applied to convert the mass transfer coefficients to heat transfer coefficients. Numerical predictions of three-dimensional flow and heat transfer also were performed for the trapezoidal channel with and without 90? ribs tested by Lee et al. (2007). Reynolds stress turbulence model (RSM) in the FLUENT CFD code was used to calculate the heat transfer coefficients and flow fields at Re = 31,800. The results showed that the combined effects of the rib angle, rib orientation, and the sharp 180? turn significantly affected the heat (mass) transfer distributions. The secondary flows induced by the sharp 180? turn and the angled or V-shaped ribs played a very prominent role in heat (mass) transfer enhancements. The heat (mass) transfer enhancements and the pressure drops across the turn for 60? V-shaped ribs had the highest values, then came the case of (+) 60? ribs, and the heat (mass) transfer enhancements and the friction factor ratios for (?) 60? ribs was the lowest. However, comparing (?) 60? ribs with the 90? ribs, (?) 60? ribs produced higher heat (mass) transfer enhancements than the 90? ribs, as results of the secondary flow induced by the (?) 60? ribs. The overall average heat (mass) transfer for the larger inlet cases was always higher than that for the smaller inlet cases in the ribbed trapezoidal channel. Considering the thermal performance comparisons of the (+) 60? ribs, the (?) 60? ribs, and 60? V-shaped ribs for the smaller inlet cases, the highest thermal performance was produced by the (?) 60? ribs, and the 60? V-shaped ribs and the (+) 60? ribs had almost the same levels of the thermal performance since the 60? V-shaped ribs produced the highest heat (mass) transfer enhancement but also produced highest pressure drops. For the larger inlet cases, the (+) 60? ribs produced the highest values, then came the case of the 60? V-shaped ribs, and the thermal performance for the (?) 60? ribs was the lowest. The Reynolds stress model (RSM) showed well flow fields and heat transfer distributions but underpredicted average Nusselt number ratios. Advisors/Committee Members: Lau, Sai Chuen (advisor), Anand, Nagamangala K (committee member), Hassan, Yassin A (committee member), Heffington, Warren M (committee member).

Subjects/Keywords: heat (mass) transfer

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oh, S. H. (2009). Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-3198

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oh, Sung Hyuk. “Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters.” 2009. Thesis, Texas A&M University. Accessed October 14, 2019. http://hdl.handle.net/1969.1/ETD-TAMU-3198.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oh, Sung Hyuk. “Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters.” 2009. Web. 14 Oct 2019.

Vancouver:

Oh SH. Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2019 Oct 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3198.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oh SH. Experimental and numerical investigation of turbulent flow and heat (mass) transfer in a two-pass trapezoidal channel with turbulence promoters. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3198

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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