Abstract:
On the example of
a problem about Couette flow the method of calculation of
macroparameters of gas in channels which thickness is commensurable
with average length of free run of molecules of gas is offered. As
the basic equation it is used the linearize BGK (Bhatnagar, Gross,
Krook) model of Boltzmann kinetic equation, and as a boundary
condition on walls of the channel - the model of mirror- diffusion
reflections. For various values of thickness of the channel and
factor of accommodation of a tangential impulse of molecules of gas
by the walls of the channel values of streams of weight of gas and
heat falling unit of width of the channel are calculated. Comparison
with the similar results published in an open press is
lead.
Keywords:boltzmann kinetic equation, the modelling kinetic equations,
exact analytical decisions, models of boundary conditions.
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