A Multirate Approach for Fluid-Structure Interaction Computation with Decoupled Methods
For researchers in computational fluid-structure interaction, this provides a practical way to reduce computational expense without sacrificing accuracy.
The paper proposes a multirate time-stepping approach for decoupled fluid-structure interaction methods, using different time steps for fluid and structure. Numerical experiments demonstrate stability and same-order accuracy as single-step schemes with significantly reduced computational cost.
We investigate a multirate time step approach applied to decoupled methods in fluid and structure interaction(FSI) computation, where two different time steps are used for fluid and structure respectively. For illustration, the multirate technique is tested by the decoupled β-scheme. Numerical experiments show that the proposed approach is stable and retains the same order accuracy as the original single time step schemes, while with much less computational expense.