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Published December 1990 | Published
Journal Article Open

Large‐scale structures and molecular mixing


Scalar mixing and chemical reactions in turbulent shear layers and jets are examined with emphasis on experimental results of high spatial and temporal resolution. Such measurements show that the notion of distinguishing fluids that are molecularly mixed from those that are simply stirred is valid and useful. Two models that seem especially suitable for implementing mixing analyses from this viewpoint are described and speculations on possible connections with the idea of chaotic advection offered.

Additional Information

© 1991 American Institute of Physics. Received 28 August 1990; accepted 20 December 1990. The authors are pleased to acknowledge helpful discussions with R. W. Dibble, A. R. Kerstein, and with their colleagues and students at Caltech and Stanford. They also thank M. Koochesfahani for providing the unpublished data in Fig. 11. J. E. B. was supported under AFOSR Contract No.90-0304, ONR Grant No. N-00014-89-J-1991, and by the Gas Research Institute under Grant No. 5087-260-1467.

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