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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

NUMERICAL PREDICTION OF MOMENTUM AND SCALAR FIELDS IN A JET IN CROSS FLOW: COMPARISON OF LES AND SECOND ORDER TURBULENCE CLOSURE CALCULATIONS

pages 425-430
DOI: 10.1615/TSFP2.1450
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摘要

The aim of the present work is to investigate the capability of LES using the eddy viscositiy approach along with the dynamic procedure to predict flow (mean velocity, Reynolds stress tensor) and a specified scalar eddy diffusivity approach to capture mixing fields (mean and variance of mixture fraction) in a jet discharging into a crossflow. This is achieved by comparing the LES results with linear and nonlinear second order turbulence closure models on the one hand and with experimental data of Andreopoulos (1983), Andreopoulos and Rodi (1984) on the other hand. For the RANS simulations, results by Heinrich (2000) are used. The results show the advantage of the LES compared to RANS simulations. Furthermore some aspects of the influence of the inlet conditions on the LES computation time has been pointed out.

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