A new fractal interaction by exchange with the mean mixing model for large eddy simulation/filtered mass density function applied to a multiscalar three-stream turbulent jet

作者：Shetty Dinesh A; Chandy Abhilash J^*; Frankel Steven H

来源：Physics of Fluids, 2010, 22(2): 025102.

DOI：10.1063/1.3319826

A newly developed fractal interaction by exchange with the mean (FIEM) subgrid mixing model is comparatively assessed against several other popular mixing models in the context of the large eddy simulation (LES) and filtered mass density function approaches. A novel multiscalar three-stream turbulent jet mixing problem, consisting of acetone-doped air surrounded by a pure ethylene stream issuing into an air collow, is used for the assessment. LES predictions using the FIEM, IEM, Euclidean minimum spanning tree, and parametrized scalar profile mixing models are compared with experimental measurements of scalar mean and rills profiles and demonstrate that FIEM is in better agreement with the data than the other models for this case.

• 出版日期2010-2