| Issue |
ESAIM: M2AN
Volume 39, Number 3, May-June 2005
Special issue on Low Mach Number Flows Conference
|
|
|---|---|---|
| Page(s) | 515 - 535 | |
| DOI | https://doi.org/10.1051/m2an:2005021 | |
| Published online | 15 June 2005 | |
Local preconditioners for steady and unsteady flow applications
1
Tel-Aviv University, Israel
and NIA, Hampton, VA.
2
NASA Langley Research Center,
Hampton,VA.
Preconditioners for hyperbolic systems are numerical artifacts to accelerate the convergence to a steady state. In addition, the preconditioner should also be included in the artificial viscosity or upwinding terms to improve the accuracy of the steady state solution. For time dependent problems we use a dual time stepping approach. The preconditioner affects the convergence rate and the accuracy of the subiterations within each physical time step. We consider two types of local preconditioners: Jacobi and low speed preconditioning. We can express the algorithm in several sets of variables while using only the conservation variables for the flux terms. We compare the effect of these various variable sets on the efficiency and accuracy of the scheme.
Mathematics Subject Classification: 65M06 / 76M12
Key words: Low Mach / preconditioning / Jacobi / Dual time Step / compressible Navier Stokes.
© EDP Sciences, SMAI, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.