Two-dimensional shear dispersion for skewed flows in narrow gaps between moving surfaces
Author:
- 1 May 1990
- journal article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 214, 211-228
Abstract
Flows transporting material between nearby moving surfaces are ubiquitous in machinery of all scales and with a variety of geometries. Here a general derivation is given of the effective two-dimensional mixing process in a narrow gap for a solute or miscible fluids. Explicit formulae are given for the shear dispersion tensor in laminar and turbulent (logarithmic velocity profile) flows. It is shown that if improved mixing is required, then the optimum direction for additional boundary motion or stress is at right angles to the primary flow direction.Keywords
This publication has 11 references indexed in Scilit:
- Long-term dispersion in unsteady skewed free surface flowEstuarine, Coastal and Shelf Science, 1986
- Puff Growth in an Ekman LayerJournal of the Atmospheric Sciences, 1982
- Buoyancy effects upon lateral dispersion in open-channel flowJournal of Fluid Mechanics, 1979
- On the tensor form of the bulk dispersion coefficient in a bounded skewed shear flowJournal of Geophysical Research: Oceans, 1978
- Diffusion in an Ekman LayerJournal of the Atmospheric Sciences, 1969
- The role of wind shear in horizontal diffusion of ambient particlesQuarterly Journal of the Royal Meteorological Society, 1965
- The effect of wind shear on horizontal spread from an instantaneous ground sourceQuarterly Journal of the Royal Meteorological Society, 1962
- The dispersion of marked fluid in turbulent shear flowJournal of Fluid Mechanics, 1959
- On the dispersion of a solute in a fluid flowing through a tubeProceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1956
- Dispersion of soluble matter in solvent flowing slowly through a tubeProceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1953