Grid-independent wall layer turbulence model for complex flow calculations

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5292743

Jennings, M J; Morel, T ^[1]

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1. Illinois Inst. of Tech., Chicago, IL (USA)

A new modeling approach has been developed for the near wall region in turbulent flows, to be used as an alternative to wall functions in multi-dimensional flow simulation codes. The model involves the solution of a set of boundary layer equations on a finely resolved one-dimensional grid spanning the wall layer (below y{sup +}--50). The wall layer grid is dynamically scaled to provide sufficient resolution of the near wall flow regardless of the resolution of the bulk flow grid. The wall layer solution does not rely on the assumption of turbulence equilibrium (production-dissipation), making it applicable to complex flows involving separation and reattachment. Comparison to skin friction and heat transfer data in sudden expansion flows shows that the new model performs significantly better than the wall functions. 12 refs., 6 figs.

• Research Organization: Ricardo-ITI, Inc., Westmont, IL (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC04-86AL33183
• OSTI ID: 5292743
• Report Number(s): CONF-8908163-1; ON: DE90003500
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AXIAL SYMMETRY
COMPUTERIZED SIMULATION
ENERGY ANALYSIS
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
FLUID-STRUCTURE INTERACTIONS
FORECASTING
HEAT TRANSFER
MATHEMATICAL MODELS
MECHANICS
NUSSELT NUMBER
PERFORMANCE TESTING
PIPES
SIMULATION
STRESSES
SYMMETRY
TESTING
TURBULENT FLOW