On the choice of interface parameters in Robin-Robin loosely coupled schemes for fluid-structure interaction
Wednesday 31st March 2021
Gigante, G.; Vergara, C.
We consider two loosely-coupled schemes for the solution of the fluid-structure interaction problem in presence of large added mass effect. In particular, we introduce the Robin-Robin and Robin-Neumann explicit schemes where suitable interface conditions of Robin type are used. For the estimate of interface Robin parameters which guarantee stability of the numerical solution, we propose to optimize the reduction factor of the corresponding strongly-coupled (implicit) scheme, by means of the Optimized Schwarz method. To check the suitabilty of our proposals, we show numerical results both in an ideal cylindrical domain and in a real human carotid.