Multiple-time-scale concepts in turbulent transport modellingThe paper reports progress in developing a closure employing two or more independently calculated time scales with which to characterize the rates of progress of different turbulent interactions. The approach contrasts with that used by earlier single-point models which adopt just a single time scale, proportional to the turbulence energy turnover time. The present treatment divides the energy containing part of the spectrum into two regions which respond at different rates and in different ways to changes in the environment. Computational results are reported for several thin shear flows which show striking improvement in the level of agreement with experiment over that obtained with models employing only one time scale.
Document ID
19800065107
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hanjalic, K. (California Univ. Davis, CA, United States)
Launder, B. E. (California Univ. Davis, CA, United States)
Schiestel, R. (California, University Davis, Calif., United States)