Computation of two-phase flow in steam generator using Domain Decomposition and Local Zoom methods

摘要

We present flow simulations in the Steam Generator of a pressurized water nuclear reactor using Domain Decomposition Methods (DDM) and Local Zoom methods on workstation cluster. Concerning the DDM, we use a Dirichlet-Neumann approach jointly with FEM for averaged mixture balance equations. The algorithm, based on Parallel or sequential iteration-by-subdomain method, works with overlapping or nonoverlapping subdomains and With conforming or nonconforming meshing. With DDM, the computational problem size is easily increased to about 100, 000 mesh cells and the CPU time is strongly reduced.