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Some aeroacoustic and aerodynamic applications of the theory of nonequilibrium thermodynamicsAn exact equation is derived for the dissipation function of a homogeneous, isotropic, Newtonian fluid, with terms associated with irreversible compression or expansion, wave radiation, and the square of the vorticity. This and other forms of the dissipation function are used to identify simple flows, such as incompressible channel flow, the potential vortex with rotational core, and incompressible, irrotational flow as minimally dissipative distributions. A comparison of the hydrodynamic and thermodynamic stability characteristics of a parallel shear flow suggests that an association exists between flow stability and the variation of net dissipation with disturbance amplitude, and that nonlinear effects, such as bounded disturbance amplitude, may be examined from a thermodynamic basis.
Document ID
19910027879
Document Type
Conference Paper
Authors
Horne, W. Clifton (NASA Ames Research Center Moffett Field, CA, United States)
Smith, Charles A. (NASA Ames Research Center Moffett Field, CA, United States)
Karamcheti, Krishnamurty (Florida State University Tallahassee, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1990
Subject Category
THERMODYNAMICS AND STATISTICAL PHYSICS
Report/Patent Number
AIAA PAPER 90-3989
Distribution Limits
Public
Copyright
Other