Abstract
A theoretical analysis of a dilute fluid-solid suspension flow, based on the derivation of equations for linear and angular momentum fluxes in the solid phase, is presented. These equations turn out to be particularly useful in the case of solid particles which only respond very slightly to fluid turbulent fluctuations, when the flow is bounded by solid walls. The applications of the method to a simple example of two-dimensional steady-state flow demonstrates the possibility of a second-order closure. Modelling and the expression of boundary conditions are obtained from the study of particle-wall collisions. In this way it is possible to establish a set of algebraic relations between kinetic transfers in the solid phase.
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