Dynamic stabilization of the Rayleigh-Bénard instability by acceleration modulation

Anand Swaminathan, Steven L. Garrett, Matthew E. Poese, Robert William Smith

Research output: Contribution to journalArticle

Abstract

This paper presents the results of an experimental investigation of the parametric stabilization of Rayleigh-Bénard convection through the imposition of sinusoidal vibration. 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 thermodynamic efficiency of the device. These performance issues caused by suspected convective instability have been seen both in traveling wave thermoacoustic refrigerators and cryogenic pulse tube chillers. This paper 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 with comparison to the computational methods of R. M. Carbo [J. Acoust. Soc. Am. 135, 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.

Original languageEnglish (US)
Pages (from-to)2334-2343
Number of pages10
JournalJournal of the Acoustical Society of America
Volume144
Issue number4
DOIs
StatePublished - Oct 1 2018

Fingerprint

convection
stabilization
modulation
containers
vibration
thermoacoustic refrigerators
thermodynamic efficiency
fluidics
flow visualization
traveling waves
cryogenics
tracers
kinematics
semiconductor lasers
retarding
tubes
Stabilization
Experiment
Modulation
fluids

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Swaminathan, Anand ; Garrett, Steven L. ; Poese, Matthew E. ; Smith, Robert William. / Dynamic stabilization of the Rayleigh-Bénard instability by acceleration modulation. In: Journal of the Acoustical Society of America. 2018 ; Vol. 144, No. 4. pp. 2334-2343.
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Dynamic stabilization of the Rayleigh-Bénard instability by acceleration modulation. / Swaminathan, Anand; Garrett, Steven L.; Poese, Matthew E.; Smith, Robert William.

In: Journal of the Acoustical Society of America, Vol. 144, No. 4, 01.10.2018, p. 2334-2343.

Research output: Contribution to journalArticle

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