nFluent accounts for the virtual mass of a particle or droplet (Discrete Phase), the equations are in the theory guide under equation of motion of a particle.nWhen you have a dynamic mesh model and a moving body, Fluent theory guide did not mention anything about the virtual mass (according to my knowledge). However, I believe that this term is included in the fluid forces as the acceleration of the fluid contacting the wall will results in higher pressure and higher shear stress at the wall.nFluent calculate the force at the wall as a sum of the pressure forces and the shear stress forces.nn