Turbulence modeling experience in ducts with forced convection flow

Journal Article · Fri May 14 04:00:00 EDT 1999 · Numerical Heat Transfer. Part A, Applications

OSTI ID:355629

Rokni, M; Sunden, B ^[1]

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1. Lund Inst. of Tech. (Sweden). Div. of Heat Transfer

The performance of a turbulence model in predicting the flow fields and temperature fields of relevant industrial problems has become increasingly important during the last few years. This is also valid for turbulent duct flow, which occurs frequently in many industrial applications such as compact heat exchangers and gas turbine cooling systems. This study presents a general computational method for calculating turbulent quantities in arbitrary three-dimensional ducts. Four different turbulence models for the turbulent Reynolds stresses are compared, namely, a standard {Kappa}-{epsilon} model, a nonlinear {Kappa}-{epsilon} model, an explicit algebraic stress model (EASM), and a full Reynolds stress model (RSM). The turbulent heat fluxes are modeled by the simple eddy diffusivity concept, the generalized gradient diffusion hypothesis, and the wealth {alpha} earnings {times} time methods. A finite volume technique for nonstaggered grids combined with the SIMPLEC algorithm is applied. A modified strongly implicit procedure is implemented for solving the equations. The van Leer scheme is applied for the convective terms except for the {Kappa} and {epsilon} equations, where the hybrid scheme is used.

• OSTI ID: 355629
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 6 Vol. 35; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DUCTS
FLOW MODELS
FORCED CONVECTION
GAS TURBINES
HEAT EXCHANGERS
THREE-DIMENSIONAL CALCULATIONS
TURBULENT FLOW