Parallel Solution of Multibody Store Separation Problems by a Fictitious Domain Method

摘要

The numerical simulation of interaction between fluid and complex geometries, e.g., multibody store separation, is computationally expensive and parallelism often appears as the only way toward large scale of simulations, even if we have a fast Navier-Stokes solver. The method we advocate here is a combination of a distributed Lagrange multiplier based fictitious domain method and operator splitting schemes. This method allows the use of a fixed structured finite element grid on a simple shape auxiliary domain containing the actual one for the entire fluid flow simulation. It can be easily parallelized and there is no need to generate a new mesh at each time step right after finding the new position of the rigid bodies. Numerical results of multibody store separation in an incompressible viscous fluid on an SGI Origin 2000 are presented.