  In this work, we present an alternative methodology to solve the
particle-fluid interaction in the resolved CFDEM coupling framework. This
numerical approach consists of coupling a Discrete Element Method (DEM) with a
Computational Fluid Dynamics (CFD) scheme, solving the motion of immersed
particles in a fluid phase. As a novelty, our approach explicitly accounts for
the body force acting on the fluid phase when computing the local momentum
balance equations. Accordingly, we implement a fluid-particle interaction
computing the buoyant and drag forces as a function of local shear strain and
pressure gradient. As a benchmark, we study the Stokesian limit of a single
particle. The validation is performed comparing our outcomes with the ones
provided by a previous resolved methodology and the analytical prediction. In
general, we find that the new implementation reproduces with very good accuracy
the Stokesian dynamics. Complementarily, we study the settling terminal
velocity of a sphere under confined conditions.
