Calculation of particle trajectories in the presence of a gradient in turbulent-velocity variance
| ISSN: |
1573-1472
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Geosciences
Physics
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| Notes: |
Abstract Recent papers by Wilson et al. (1981b) and Legg and Raupach (1982) give methods for the calculation of particle trajectories in turbulence with a gradient in vertical velocity variance Σ 2 w. However the two methods seem contradictory. This paper demonstrates that in systems in which l(dΣ w /dz) (where / is the length scale) varies only slowly with height z, the two methods give similar predictions, and indicates why this is the case. For a particular system in which the restriction on l(dΣ w /dz) is not satisfied, it is shown that neither method is correct but that a simple modification of the method of Wilson et al. (1981b) gives reasonable predictions.
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| Type of Medium: |
Electronic Resource
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| URL: |