Adaptive time stepping and Schwarz Waveform Relaxation Method for Compressible Navier-Stokes Equations
A space-time domain decomposition algorithm for the compressible Navier–Stokes problem has been designed,with the aim of implementing it in three dimensions,in an industrial code.The system is discretised with a second order explicit scheme in time and Finite Volumes Method in space.To achieve full speed-up performance,a Schwarz Waveform Relaxation (SWR) method is used,as it allows local space and time stepping.We compare a second order in time Schwarz-Runge Kutta (S-RK2) method with fixed step size method and a new,adaptive time stepping Schwarz Waveform Relaxation with the same explicit time scheme method (SWR-RK2).We illustrate the advantages of SWR-RK2 and the considerable cost savings of adaptive time stepping with a diminishing number of coupling iterations.The performances of different parallel computing strategies (using OpenMP,MPI and GPUs) are compared for complex configurations.
Direct numerical simulation Compressible Navier-Stokes Solver Finite Volumes Method Time-Space Domain Decomposition Schwarz Waveform Relaxation Method adaptive time-stepping
Oana Alexandra Ciobanu Laurence Halpern Xavier Juvigny Juliet Ryan
ONERA the French Aerospace Lab, Palaiseau, France LAGA Laboratoire Analyse, Géométrie et Applications, Paris, France
国际会议
The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)
成都
英文
1-2
2014-07-25（万方平台首次上网日期，不代表论文的发表时间）