  The present study provides a detailed description of the forces on an
ellipsoidal particle in the vicinity of the rough wall. Three-dimensional
numerical simulations are performed using body-fitted mesh to estimate the
drag, lift, and torque coefficients. A large number of simulations are
conducted %(approximately 2400) over a range of parameters such as shear
Reynolds number ($10 \le Re_s \le 100$), orientation angle ($0\le\theta\le
180$), and wall-particle separation distance ($0.1\le\delta\le2.0$) to get a
comprehensive description of variation of the above coefficients. Using the
simulation results, we develop the correlations for the drag and lift
coefficients to describe the effect of rough wall, inclination angles, and
particle Reynolds numbers on the hydrodynamic coefficients. The proposed
correlations can be used for two phase flow simulation using
Eulerian-Lagrangian framework.
