Interspecies stress in momentum equations for dense binary particulate systems.
For two-species particulate systems, ensemble averaged continuity and momentum equations for each species are derived based on the Liouville equation of the system. The ensemble average used is species specific. It is found that the interaction between species results in not only the interspecies force but also a stress in the momentum equations. In the limit that particles of one of the species can be considered as a continuum, the existence of the interspecies stress enables us to reduce the derived equations to the familiar form for dispersed two-phase flows.
Zhang
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DZ
Theoretical Division, Fluid Dynamics Group T-3, B216, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. dzhang@lanl.gov
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Rauenzahn
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