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Published December 1982 | Published
Journal Article Open

A simple model of mixing and chemical reaction in a turbulent shear layer


Arguments are presented to show that the concept of gradient diffusion is inapplicable to mixing in turbulent shear layers. A new model is proposed for treating molecular mixing and chemical reaction in such flows at high Reynolds number. It is based upon the experimental observations that revealed the presence of coherent structures and that showed that fluid elements from the two streams are distributed unmixed throughout the layer by large-scale inviscid motions. The model incorporates features of the strained flame model and makes use of the Kolmogorov cascade in scales. Several model predictions differ markedly from those of diffusion models and suggest experiments for testing the two approaches.

Additional Information

© 1982 Cambridge University Press. Received July 2 1981; Revised May 24 1982. Published Online April 20 2006. This work was supported by Air Force Office of Scientific Research Contract nos. F4962079C-0159 and F4962079C-0020 and by Project Squid under Contract no. N00014-79-C-0365.

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