Multigrid computation for turbulent recirculating flows in complex geometries

Journal Article · · Numerical Heat Transfer. Part A, Applications; (United States)

OSTI ID:6484159

Shyy, Wei; Chen, Minghsiung ^[1]; Sun, Chiasheng; Chang, K C ^[2]

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1. Univ. of Florida, Gainesville (United States)
2. National Cheng Kung Univ., Tainan (Taiwan, Province of China)

Computation of recirculating turbulent flow in complex geometries is important in engineering but fundamentally difficult. A procedure using a full multigrid and full approximation storage is developed in conjunction with a pressure-based algorithm using curvilinear coordinates and the k-[var epsilon] two-equation turbulence model. This method is applied to several flow problems with different geometries, grid sizes, and convection schemes. Although the multigrid 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 helps improve the convergence rate.

• OSTI ID: 6484159
• Journal Information: Numerical Heat Transfer. Part A, Applications; (United States), Journal Name: Numerical Heat Transfer. Part A, Applications; (United States) Vol. 23:1; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CALCULATION METHODS
CONVECTION
CONVERGENCE
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
TURBULENT FLOW
VELOCITY