Hi, everyone
I'm doing a simulation on particle-fluid flow in a rectangular fracture. When it comes to the force model in the couplingproperties, I have some problem in chosing the force models. My model considers main three force including pressure gradient force, viscosity force and drag force. In many literatures, I get that the buoyant force, which is implemented by Archimedes model in CFDEM, is essentially a kind of pressure gradient force. And according to the paper "Discrete particle simulation of particle–fluid flow: model formulations and their applicability", in model A, the buoyant force has been included in the pressure gradient force term. So I wonder that is the Archimedes model included in gradPForce model in CFDEM? For a accurate simulation, do I need to apply both Archimedes model and gradPForce model, or just the pressure gradient force to avoid the repeated force calculations?
I' m looking forward that someone can help me. Thank you vert much.