[vivekcfd]

I am solving a transient FSI problem where we have been facing an accuracy issue due to hard-coded "Total Force" transfer to the structure side. Our FSI problem requires only the transient component of the Total force across the FSI interface. Therefore, I would like to subtract the steady- or mean-part of the fluid-forces from the Total Force on each node at the FSI interface and consequently supply only the time-dependent part of the fluid force to the structure side.

For this operation, we require:

1) steady or mean value of total force at each node which we may get from a steady-state solution

2) Defining a new force (by subtracting Step 1 Force from the Total Force) term in transient simulation and transferring this term across the FSI surface.

Could anyone give some suggections on carrying out such a step in CFX?

thanks in advance
Vivek