Zeitschrift für Naturforschung / A / 32 (1977)

نویسنده

  • L. Waldmann
چکیده

Transport-relaxation equations for seventeen moments are derived from the linearized Boltzmann equation for a monatomic gas. Besides the well-known thirteen moments (i. e. density n, tempera­ ture T, velocity v, heat flux q, friction pressure tensor p), one additional scalar A and one ad­ ditional vector A are taken into account. In steady state, differential equations for T, v, A and constitutive laws for q, p, A follow from the transport-relaxation equations. Boundary conditions for T, v, A are obtained by the thermodynamical method from the interfacial entropy production. The role of the higher moments A and A for heat transfer in a gas between parallel plates is dis­ cussed. The heat flux has the correct low pressure limit. Due to the presence of A and A, expo­ nential terms occur in the temperature profile near the boundary.

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تاریخ انتشار 2013