On the rarefied gas experiments

Abstract

There are limits of validity of classical constitutive laws such as Fourier and Navier-Stokes equations, phenomena beyond those limits have been experimentally found many decades ago. However, it is still not clear what theory would be appropriate to model different non-classical phenomena under different conditions considering either the low-temperature or composite material structure. In this paper, a modeling problem of rarefied gases is addressed. It covers the mass density dependence of material parameters, the scaling properties of different theories and aspects of how to model an experiment. In the following, two frameworks and their properties are discussed. One of them is the kinetic theory based Rational Extended Thermodynamics; the other one is the non-equilibrium thermodynamics with internal variables and current multipliers. In order to compare these theories, an experiment performed by Rhodes is analyzed in detail. It is shown that the density dependence of material parameters has a severe impact on modeling capabilities and can lead to very different results.

References in corpus (9)

• Generalized heat conduction in heat pulse experiments
• Universal heat conduction -- the thermodynamics of some weakly nonlocal theories
• Deviation from the Fourier law in room-temperature heat pulse experiments
• Guyer-Krumhansl-type heat conduction at room temperature
• Weakly nonlocal irreversible thermodynamics - the Guyer-Krumhansl and the Cahn-Hilliard equations
• Emergence of non-Fourier hierarchies
• Models of ballistic propagation of heat at low temperatures
• Kluitenberg-Verhás rheology of solids in the GENERIC framework
• Microinertia and internal variables

Cited by in corpus (2)

• Lagging Heat Models in Thermodynamics and Bioheat Transfer: a Critical Review
• Ballistic-diffusive model for heat transport in superlattices and the minimum effective heat conductivity