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Fifth International Symposium on Turbulence and Shear Flow Phenomena
August, 27-29, 2007, Technische Universität München, Munich, Germany

DOI: 10.1615/TSFP5

LARGE EDDY SIMULATION OF A LOW SPEED, HIGH ASPECT RATIO RECTANGULAR JET IN A CROSS FLOW

pages 869-872
DOI: 10.1615/TSFP5.1360
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RÉSUMÉ

The modification to the structure of a high aspect ratio jet that laterally infiltrates into the cross flow of a river is considered. This jet in cross-flow configuration is different to that usually considered in the literature due to the large (50:1, long side is parallel to the main cross flow direction) aspect ratio of the side-wall jet, which can be thought of as a large underground fissure or fracture. The cross flow river flow is considered to have no zero-slip surfaces except for the plane from which the side jet issues. Two large eddy simulations are performed to ascertain grid dependency effects on the mean flow field, the instantaneous vorticity fields, and turbulence statistics. The paper also considers the transition mechanisms associated with the interaction between the low velocity side jet as it encounters the higher velocity cross-flow.

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