Finite volume fraction effect on self-induced velocity in two-way coupled Euler-Lagrange simulations

The present work addresses the effect of non-zero volume fraction in predicting the self-induced velocity of particles in an Euler-Lagrange (EL) simulation. Hundreds of EL simulations of flow over a random distribution of stationary particles, covering a range of Reynolds number and volume fraction, are performed to calculate the undisturbed flow and the self-induced velocities of particles in the presence of neighbors. The most significant finding is that the self-induced correction procedure of an isolated particle can be applied even at finite volume fraction, with a simple volume fraction dependent modification. However, the perturbation induced by neighbors often has a much larger effect.