From multi- to single-grid CFD on massively parallel computers: Numerical experiments on lid-driven flow in a cube using pressure–velocity coupled formulation
✍ Scribed by Yuri Feldman; Alexander Yu. Gelfgat
- Book ID
- 104015109
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 542 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0045-7930
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✦ Synopsis
A parallel implementation of a fully pressure-velocity coupled multigrid solver based on analytical solution accelerated coupled line Gauss Seidel (ASA-CLGS) smoother with grid partitioning is carried out. The parallelized algorithm is characterized by an enhanced scalability that results from a formulation enabling an intermediate analytical solution for the entire row (column) of control volumes. General strategies of applying single-or multigrid approach depending on flow characteristics are discussed. Performance of the parallelized algorithm is studied for up to 2048 processors. The developed approach is applied to analysis of a time-dependent three-dimensional incompressible lid-driven cavity flow. The steady state results of benchmark quality are reported for Re = 10 3 , 1.5 Â 10 3 and 1.9 Â 10 3 . A new benchmark case of a fully 3D flow in a cubic cavity driven by the lid moving at 45°relatively to its lateral boundaries is proposed and the corresponding data is reported.