On the Stress Tensor Jump at the Interface between a Polyatomic Gas and a Condensed Phase

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By this author: Poddoskin A.B.

Author: Poddoskin A.B.

Source: Fluid Dynamics, Volume 37, Number 4, July 2002 , pp. 658-663(6)

Publisher: Springer

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Abstract:

For the components of the hydrodynamic stress tensor the boundary condition at the interface between a polyatomic gas and a condensed phase is obtained. The boundary-value problem is solved within the framework of the previously proposed kinetic model by the method of semi-spatial moments, taking into account the rotational degrees of freedom of the gas molecules. The gas-kinetic coefficient C_p entering into the boundary condition for the stress tensor components depends on the accommodation coefficient of the tangential momentum, q, the accommodation coefficients of the translational, alpha _t, and rotational, alpha _r, energy components, and the Prandtl number. This coefficient is calculated for several polyatomic gases.