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You searched for +publisher:"Penn State University" +contributor:("Robert William Smith, Special Member"). Showing records 1 – 2 of 2 total matches.

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Penn State University

1. Swaminathan, Anand. Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation.

Degree: 2017, Penn State University

This dissertation presents the results of an experimental investigation of the parametric stabilization of Rayleigh-Bénard convection through the imposition of vibration. It has been theorized for many years that vibration could be employed to suppress natural convection, in an analogous manner to the Kapitza pendulum. The ability to dynamically stabilize Rayleigh-Bénard convection using acceleration modulation is of interest to groups who design and study thermoacoustic machines, as the introduction of parasitic convection can have deleterious effects on the desired operation and efficiency of the device. These performance issues caused by suspected convective instability have been seen both in traveling wave thermoacoustic refrigerators and in cryogenic pulse tube chillers. This dissertation reports the results of an experiment intended to determine the vibratory, fluidic, and geometric conditions under which a small, rectangular container of statically unstable fluid may be stabilized by vertical vibration, incorporating the computational methods of R. M. Carbo [J. Acoust. Soc. Am. 135(2), 654–668 (2014)]. Measurements are obtained using a large-displacement kinematic shaker of an original design with the convecting gas characterized using both thermal transport measurements and flow visualization employing tracer particles illuminated by a diode laser light sheet phase-locked to the shaker. These experiments are believed to be the first demonstrating the suppression of convection through vibration in rectangular containers of macroscopic scale. Advisors/Committee Members: Steven L. Garrett, Dissertation Advisor/Co-Advisor, Steven L. Garrett, Committee Chair/Co-Chair, Robert M. Keolian, Committee Member, Victor Ward Sparrow, Committee Member, Diane Marie Henderson, Outside Member, Robert William Smith, Special Member.

Subjects/Keywords: Thermoacoustics; Acoustics; Rayleigh-Bénard convection; Pulse tube cryocooler; Parametric stabilization

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

APA (6th Edition):

Swaminathan, A. (2017). Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14553azs5363

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

Chicago Manual of Style (16th Edition):

Swaminathan, Anand. “Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation.” 2017. Thesis, Penn State University. Accessed October 28, 2020. https://submit-etda.libraries.psu.edu/catalog/14553azs5363.

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

MLA Handbook (7th Edition):

Swaminathan, Anand. “Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation.” 2017. Web. 28 Oct 2020.

Vancouver:

Swaminathan A. Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation. [Internet] [Thesis]. Penn State University; 2017. [cited 2020 Oct 28]. Available from: https://submit-etda.libraries.psu.edu/catalog/14553azs5363.

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

Council of Science Editors:

Swaminathan A. Experimental Investigation of Dynamic Stabilization of the Rayleigh-Bénard Instability by Acceleration Modulation. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/14553azs5363

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


Penn State University

2. Carbo, Randy Michael. Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach.

Degree: 2012, Penn State University

The dynamic stabilization of the Rayleigh-Beenard instability by vertical vibrations in rectangular enclosures is computationally investigated. Analogous dynamic stability phenomenon are treated to provide physical intuition into the problem. Linear stability analysis is used to determine the stability boundaries. The Galerkin method is used to solve the spatial portion of the differential equations, and Floquet analysis is used to solve the temporal portion. Both the synchronous and the subharmonic regions of instability are recovered. Two drive types (sinusoidal and rectangular) and two types of thermal boundary conditions (insulating and conducting) are considered. The conditions necessary for dynamic stability are reported for Rayleigh numbers from critical to 106 and for Prandtl numbers in the range of 0.1-7. Plots of two nondimensional groups, Ravib, and Pvib, are provided to summarize the conditions for the two stability boundaries. The linear model is compared to a published data set where the performance of an inverted pulse tube is measured; the predicted asymptotic scaling is con�firmed. Advisors/Committee Members: Steven Lurie Garrett, Dissertation Advisor/Co-Advisor, Steven Lurie Garrett, Committee Chair/Co-Chair, Thomas B Gabrielson, Committee Member, Mark Levi, Committee Member, Anthony A Atchley, Committee Member, Matthew Ernest Poese, Special Member, Robert William Smith, Special Member.

Subjects/Keywords: Floquet; Rayleigh-Benard; parametric; dynamic stability; convection; Galerkin

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

APA (6th Edition):

Carbo, R. M. (2012). Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14613

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

Chicago Manual of Style (16th Edition):

Carbo, Randy Michael. “Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach.” 2012. Thesis, Penn State University. Accessed October 28, 2020. https://submit-etda.libraries.psu.edu/catalog/14613.

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

MLA Handbook (7th Edition):

Carbo, Randy Michael. “Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach.” 2012. Web. 28 Oct 2020.

Vancouver:

Carbo RM. Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach. [Internet] [Thesis]. Penn State University; 2012. [cited 2020 Oct 28]. Available from: https://submit-etda.libraries.psu.edu/catalog/14613.

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

Council of Science Editors:

Carbo RM. Dynamic Stabilization of the Rayleigh-Benard instability in rectangular enclosures: A computational approach. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/14613

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

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