建立两相流方程的动力论方法

本文从Boltzmann方程出发建立两相流基本方程。其中碰撞项的处理采用了类似于经典动力论在处理稠密气体输运性质时采用过的方法。动力论方法表明,在气固两相流中除通常的分压和分热流外,还存在碰撞压强和碰撞热流,它们同通常的分压和分热流有本质的差别。本文还讨论了二体碰撞假设和混沌假设在气固两相流中的适用性。

SET UP THE EQUATIONS FOR TOW-PHASE FLOWS BY THE METHOD OF KINETIC THEORY

The fundamental equations for tow-phase flows are deduced from the Boltz-mann's equation. The collision terms are treated with a similar method to what is used in the classical kinetic theory for handling the transport properties of dense gases. It is shown in the method of the kinetic theory that the collision pressure and the collision thermal flux: exist in gas-particle flows in addition to the general partial pressure and thermal flux. Their physical characters are quite different from those of the general partial pressure and thermal flux. The application of binary collision assumption and the assumption of molecular chaos to gas-particle flows is also discussed.