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Abstract
In this paper we discuss the massdensity of gas media as represented in kinetic theory. It is argued that conventional representations of this variable in gas kinetic theory contradict a macroscopic field variable and thermodynamic property in classical thermodynamics. We show that in cases where massdensity variations exist throughout the medium, introducing the massdensity as a macroscopic field variable leads to a restructuring of the diffusive/convective fluxes and implies some modifications to the hydrodynamic equations describing gas flows and heat transfer. As an illustration, we consider the prediction of massdensity profiles in a simple heat conduction problem between parallel plates maintained at different temperatures.
Original language  English 

Title of host publication  Proceedings of the 26th International Symposium on Rarified Gas Dynamics 
Number of pages  6 
Volume  1084 
DOIs  
Publication status  Published  20 Jul 2008 
Event  26th International Symposium on Rarefied Gas Dynamics  RGD26  Kyoto, Japan Duration: 20 Jul 2008 → 25 Jul 2008 
Conference
Conference  26th International Symposium on Rarefied Gas Dynamics  RGD26 

Abbreviated title  RGD26 
Country/Territory  Japan 
City  Kyoto 
Period  20/07/08 → 25/07/08 
Keywords
 massdensity
 classical thermodynamics
 Boltzmann kinetic equation
 dilute gases
 kinetic theory
 distribution function
 statistical physics
 compressible fluids
 continuum mechanics
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Dive into the research topics of 'The concept of massdensity in classical thermodynamics and the Boltzmann kinetic equation for dilute gases'. Together they form a unique fingerprint.Projects
 1 Finished

BEYOND NAVIERSTOKES: MEETING THE CHALLENGE OF NONEQUILIBRIUM GAS DYNAMICS
Reese, J. & McInnes, C.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/05 → 31/01/10
Project: Research