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You searched for +publisher:"University of Tennessee – Chattanooga" +contributor:("Nichols, Stephen"). Showing records 1 – 3 of 3 total matches.

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1. Karman, Kristen. 2-D CFD design of the cross-sectional shape of arterial stents.

Degree: 2013, University of Tennessee – Chattanooga

An approach for desigining arterial stents to maximize wall shear stress is presented. A cost equation to maximize wall shear stress is derived and then inverted into a minimization problem for the optimizer. A 2-D mixed-element finite-volume scheme for solving the compressible Navier-Stokes equations is implemented. A paramaterization of the cross- sectional shape of the stent wire using Hicks-Henne functions is described. The strategies used in the commercial optimization software, DAKOTA, to minimize the cost equation are described. The solver is validated using well known fluid flow test cases and is shown to match other published computed results for bloodflow through stented arteries. New candidate stent shapes are produced by the optimization and are evaluated based on comparison to modern commercial stent designs. Advisors/Committee Members: Anderson, W. Kyle, Nichols, Stephen, Melnik, Robert, College of Engineering and Computer Science.

Subjects/Keywords: Stents (Surgery); Stents (Surgery)  – Fluid dynamics

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APA (6th Edition):

Karman, K. (2013). 2-D CFD design of the cross-sectional shape of arterial stents. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/97

Chicago Manual of Style (16th Edition):

Karman, Kristen. “2-D CFD design of the cross-sectional shape of arterial stents.” 2013. Masters Thesis, University of Tennessee – Chattanooga. Accessed January 23, 2020. https://scholar.utc.edu/theses/97.

MLA Handbook (7th Edition):

Karman, Kristen. “2-D CFD design of the cross-sectional shape of arterial stents.” 2013. Web. 23 Jan 2020.

Vancouver:

Karman K. 2-D CFD design of the cross-sectional shape of arterial stents. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2013. [cited 2020 Jan 23]. Available from: https://scholar.utc.edu/theses/97.

Council of Science Editors:

Karman K. 2-D CFD design of the cross-sectional shape of arterial stents. [Masters Thesis]. University of Tennessee – Chattanooga; 2013. Available from: https://scholar.utc.edu/theses/97

2. Hassan, Walied E. Blade resolved simulation of wind farms.

Degree: 2015, University of Tennessee – Chattanooga

This research examines the feasibility of reducing the time to solution for a high-fidelity, blade-resolved CFD simulation of a wind farm using Tenasi. The intent is to reduce the overall cost by initializing the flow fields of the individual turbines in the wind farm using a steady state or an unsteady simulation of a single turbine. This is achieved by replicating the mesh and the solution corresponding to a single turbine repeatedly, thus initializing the solution for the entire wind farm. The wind farm consists of the DTU 10 MW Reference Wind Turbines. Results compared to the “from scratch” solutions shows a 25 – 50% reduction in computational cost for steady simulations. For unsteady simulations, it is hypothesized that the savings could be on the order of 70%. Advisors/Committee Members: Sreenivas, Kidambi, Nichols, Stephen, Taylor, Lafayette K., College of Engineering and Computer Science.

Subjects/Keywords: Wind power plants; Wind turbines

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APA (6th Edition):

Hassan, W. E. (2015). Blade resolved simulation of wind farms. (Masters Thesis). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/444

Chicago Manual of Style (16th Edition):

Hassan, Walied E. “Blade resolved simulation of wind farms.” 2015. Masters Thesis, University of Tennessee – Chattanooga. Accessed January 23, 2020. https://scholar.utc.edu/theses/444.

MLA Handbook (7th Edition):

Hassan, Walied E. “Blade resolved simulation of wind farms.” 2015. Web. 23 Jan 2020.

Vancouver:

Hassan WE. Blade resolved simulation of wind farms. [Internet] [Masters thesis]. University of Tennessee – Chattanooga; 2015. [cited 2020 Jan 23]. Available from: https://scholar.utc.edu/theses/444.

Council of Science Editors:

Hassan WE. Blade resolved simulation of wind farms. [Masters Thesis]. University of Tennessee – Chattanooga; 2015. Available from: https://scholar.utc.edu/theses/444

3. Mittal, Anshul. A parabolized Navier-Stokes method for wind farm applications.

Degree: 2015, University of Tennessee – Chattanooga

Fluid flow simulations play an important role in the wind industry. With the development of large wind farms, flow simulations through an entire wind farm are becoming a necessity. These are required for designing the layout of new wind farms in the development stage and for forecasting power production from the existing ones for operational purposes. Conventional Navier-Stokes simulations (commonly referred to as CFD simulations) are computationally very expensive since they require a supercomputer with runtimes of several weeks. A Parabolized Navier-Stokes (PNS) method is developed and implemented in this study. The developed PNS method requires less stringent approximations as compared to the existing parabolic methods and incorporates more physics. A wind turbine model is developed and coupled with the PNS method for simulating wind turbines and entire wind farms. The wind turbine model is adapted for spatial marching and is based on the Actuator Line rotor model and Blade Element Momentum theory. The developed PNS method is validated and verified using several test cases and a wind farm simulation on a desktop computer has a runtime of only several hours. Advisors/Committee Members: Taylor, Lafayette K., Briley, W. Roger, Nichols, Stephen, Sreenivas, Kidambi, Anderson, William K., Matthews, John, College of Engineering and Computer Science.

Subjects/Keywords: Wind power plants; Wind turbines

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

APA (6th Edition):

Mittal, A. (2015). A parabolized Navier-Stokes method for wind farm applications. (Doctoral Dissertation). University of Tennessee – Chattanooga. Retrieved from https://scholar.utc.edu/theses/438

Chicago Manual of Style (16th Edition):

Mittal, Anshul. “A parabolized Navier-Stokes method for wind farm applications.” 2015. Doctoral Dissertation, University of Tennessee – Chattanooga. Accessed January 23, 2020. https://scholar.utc.edu/theses/438.

MLA Handbook (7th Edition):

Mittal, Anshul. “A parabolized Navier-Stokes method for wind farm applications.” 2015. Web. 23 Jan 2020.

Vancouver:

Mittal A. A parabolized Navier-Stokes method for wind farm applications. [Internet] [Doctoral dissertation]. University of Tennessee – Chattanooga; 2015. [cited 2020 Jan 23]. Available from: https://scholar.utc.edu/theses/438.

Council of Science Editors:

Mittal A. A parabolized Navier-Stokes method for wind farm applications. [Doctoral Dissertation]. University of Tennessee – Chattanooga; 2015. Available from: https://scholar.utc.edu/theses/438

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