I want to do a simulation for a bileaflet mechanical heart valve. Initially, the geometry has very small gaps like 0.05-0.1 mm in the hinges. The pulsatile fluid flow through the valve and leaflets rotate around their hinges (1DOF). During the backflow the leaflets closes the flow domain and prevent the backflow. The movement of the leaflets are not predefined and they move based on the pulsatile flow.
1. Should I choose the dynamic mesh approach or overset mesh?
2. What should I do for the small gaps since the small flow with higher stresses inside the hinge (small gaps) are also important?
3. What criteria for the meshing should I consider if I want to have LES as turbulence models