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Interaction of Acoustic and Thermal Modes in the Vibrationally Relaxing Gases. Acoustic Cooling

Abstract

The dynamic equation which governs an excess temperature associated with the thermal mode in vibrationally relaxing gas is derived. The nonlinear transfer of acoustic energy to the energy of the thermal mode in a relaxing gas causes slow variation of temperature with time. The nal dynamic equation is instantaneous. All types of sound, including aperiodic, may be considered as an acoustic source of corresponding heating or cooling. The study considers sound with frequencies much larger than the inverse time of the thermodynamic relaxation. In the nonequilibrium regime, if standard attenuation is neglected, gas temperature decreases with time. Examples concern heating and cooling caused by periodic in time sound and an impulse. The inuence of standard viscosity, thermal conductivity, and heat withdrawal is briey discussed.

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
ACTA PHYSICA POLONICA A no. 123, edition 4,
ISSN: 0587-4246
Language:
English
Publication year:
2013
Bibliographic description:
Perelomova A.: Interaction of Acoustic and Thermal Modes in the Vibrationally Relaxing Gases. Acoustic Cooling// ACTA PHYSICA POLONICA A. -Vol. 123, iss. 4 (2013),
DOI:
Digital Object Identifier (open in new tab) 10.12693/aphyspola.123.681
Verified by:
Gdańsk University of Technology

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