Multigrid computation for turbulent recirculating flows in complex geometries

Wei Shyy, Chia Sheng Sun, Ming Hsiung Chen, Keh-Chin Chang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Computation of recirculating turbulent flow in complex geometries is important in engineering but fundamentally difficult. A procedure using a full multi-grid and full approximation storage is developed in conjunction with a pressure-based algorithm using curvilinear coordinates and the k-ϵ two-equation turbulence model. This method is applied to several flow problems with different geometries, grid sizes, and convection schemes. Although the multi-grid procedure does not yield a convergence rate independent of these factors, its performance is noticeably less affected than that of the single-grid method. Degradation of the boundary representation during grid restriction is one effect on the multigrid performance. Some features regarding the treatment of the turbulence quantities that help the performance of the multigrid method are identified. A special grid restriction procedure is also introduced, which accommodates the velocity characteristics in the wall region and kelps improve the convergence rate.

Original languageEnglish
Pages (from-to)79-98
Number of pages20
JournalNumerical Heat Transfer; Part A: Applications
Volume23
Issue number1
DOIs
Publication statusPublished - 1993 Jan 1

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Condensed Matter Physics

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