A new version of algebraic stress model for simulating strongly swirling turbulent flows
- Combustion and Multiphase Flows Lab., Dept. of Mechanical Engineering, Catholic Univ. of America, Washington, DC (US)
A new version of the algebraic Reynolds stress model (ASM) is formulated, simplified, and employed to simulate strongly swirling flows. This model for axisymmetric cylindrical coordinates accounts for some physical mechanisms relevant to swirl-turbulence interactions that have been ignored in the original ASM derived for Cartesian coordinates. The calculated results of gas tangential and axial velocities based on this model are in good agreement with the measurements. The central toroidal recirculation zone and the combined forced and free vortex motion are well predicted. Comparisons of the predicted mean dynamic properties of strongly swirling flows show the superiority of the present model over the k-{epsilon} model and the original ASM. a turbulence model constant {beta} which is introduced in the model formulation and represents the intensity of rotational effect on turbulence, is optimized through successive comparisons with the measured data.
- OSTI ID:
- 7029846
- Journal Information:
- Numerical Heat Transfer. Part B, Fundamentals; (United States), Vol. 22:1; ISSN 1040-7790
- Country of Publication:
- United States
- Language:
- English
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99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
THERMODYNAMICS
CALCULATION METHODS
TURBULENT FLOW
FLOW MODELS
FORCED CONVECTION
GAS FLOW
NATURAL CONVECTION
REYNOLDS NUMBER
CONVECTION
ENERGY TRANSFER
FLUID FLOW
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
420400* - Engineering- Heat Transfer & Fluid Flow
990200 - Mathematics & Computers
661300 - Other Aspects of Physical Science- (1992-)