Abstract
In order to conduct the large-eddy simulation (LES) of particle-laden turbulent flows through a two-fluid approach, a model is proposed for the concentration of particles using an equilibrium assumption in which the Eulerian velocity of particles can be expressed in terms of the velocity and acceleration of the fluid phase as well as the gravitational acceleration through an asymptotic series expansion. This assumption is valid only for small Stokes numbers. The assessment of the model is carried out in forced isotropic turbulence. The LES model results well compared against results obtained by direct numerical simulation.
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