The early stages of contaminant dispersion in shear flows
- 1 October 1981
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 111 (-1) , 107-122
- https://doi.org/10.1017/s0022112081002310
Abstract
The dispersion of a spot of contaminant in a high-Péclet-number laminar flow is studied by means of the ray method developed by Cohen & Lewis (1967). This method is free from the usual severe restrictions on the time range. Thus, it is possible to investigate strong shear-distortions of the concentration distribution. Also, the effects of rigid boundaries can be allowed for simply by including reflected rays. Three examples are studied in detail: stagnation flow, a point vortex and plane Poiseuille flow.Keywords
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