Some advances in the characterization of gas and solid mixtures under low pressure conditions

This work describes the use of splitting methods in the analysis of two-phase mixtures of gas and particles under conditions that make the source terms very stiff. In this case, these are low pressure and very dense solids. The integration of the source terms proposed seems to help to tackle without difficulty the type of problems of interest. Interfacial friction and heat transfer are the two closure laws included in the model. The gas phase is considered a perfect gas and the solid one is assumed incompressible. Some numerical results complete this work. © 2012 American Institute of Physics.