FSI nonlinear problem
 

Hi to all. I would like your expertise in a problem bothering me very much. I want to perform a FSI simulation (artery-blood) using a nonlinear type of material for the arterial wall. In literature i found a paper using a 9-paremeter Mooney-Rivlin model for the wall. I tried their parameters, set nonlinear effects to on, large deflections on set my bc's and tried to run it..when when the solution converged and it was time to enter the staggered iterations it popped an error.In the evening i will post the error..What am i doing wrong?