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We consider a dense granular shear flow in a two-dimensional system. Granular systems
(composed of a large number of macroscopic particles) are far from equilibrium due to
inelastic collisions between particles: an external driving is needed to maintain the
motion of particles. Theoretical description of driven granular media is especially
challenging for dense granular flows. This paper focuses on a gravity-driven dense
granular Poiseuille flow...
In this work, we are interested in two different diffusion models for multicomponent
mixtures. We numerically recover experimental results underlining the inadequacy of the
usual Fick diffusion model, and the importance of using the Maxwell-Stefan model in
various situations. This model nonlinearly couples the mole fractions and the fluxes of
each component of the mixture. We then consider a subregion of the lower part of the lung,
in which we compare...
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