Mass transport of an impurity in a strongly sheared granular gas

Abstract

Transport coefficients associated with the mass flux of an impurity immersed in a granular gas under simple shear flow are determined from the inelastic Boltzmann equation. A normal solution is obtained via a Chapman-Enskog-like expansion around a local shear flow distribution that retains all the hydrodynamic orders in the shear rate. Due to the anisotropy induced by the shear flow, tensorial quantities are required to describe the diffusion process instead of the conventional scalar coefficients. The mass flux is determined to first order in the deviations of the hydrodynamic fields from their values in the reference state. The corresponding transport coefficients are given in terms of the solutions of a set of coupled linear integral equations, which are approximately solved by considering the leading terms in a Sonine polynomial expansion. The results show that the deviation of these generalized coefficients from their elastic forms is in general quite important, even for moderate dissipation.

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Cited by in corpus (7)

• Shear-rate dependent transport coefficients for inelastic Maxwell models
• Hydrodynamics of inelastic Maxwell models
• Segregation by thermal diffusion in granular shear flows
• Generalized transport coefficients for inelastic Maxwell mixtures under shear flow
• Rheology of a dilute binary mixture of inertial suspension under simple shear flow
• Tracer diffusion coefficients in a sheared inelastic Maxwell gas
• Mass transport in a strongly sheared binary mixture of Maxwell molecules