September 2, 2024 at 1:58 pm
Rahul
Ansys Employee

Hello,

Lets fix the mapping issue first. Both interfaces have mapping < 100%. 

To have a good mapping between the participant interfaces:

  1. Make sure FSI interfaces on fluid and solid sides overlap. The recommendation is to use the solid geometry for fluid volume extraction (the same source geometry).
  2. Meshes used should first resolve geometry curvature and physics (e.g. flow gradients, stress concentrations).
  3. For conserved quantities (force, heat flow) the coarser target mesh is acceptable. Similar mesh on both interfaces is also acceptable but not required.
  4. For non-conserved quantities such as displacement and temperature, finer target mesh is preferred (ex. CFD mesh is usually finer than Mechanical).

Refer user guide for more information: Improving Mapping Quality (ansys.com) and tutorial to know more about the two-way FSI workflow: Reed Valve FSI Co-Simulation with Partial Setup Export from Workbench (Fluent-Mechanical) (ansys.com)