Changes between Version 87 and Version 88 of gallery/movies

Timestamp:

Dec 11, 2012 6:03:46 PM (12 years ago)

Author:

hoffmann

Comment:

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gallery/movies

@@ -39 +39 @@
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 '''Description:''' \\
-This sequence shows the development of a dig dust devil during a time period of 10 minutes. The dust devil is made visible by a passive scalar which is advected by the flow. The surface flux of the passive scalar is calculated by a simple parametrization of the saltation process which depends on the friction velocity (White, 1979). Due to uncertainties in the parametrization of the surface flux, the displayed concentrations of the passive scalar are in arbitrary units. 
+This sequence shows the development of a large dust devil during a time period of 10 minutes. The dust devil is made visible by a passive scalar which is advected by the flow. The surface flux of the passive scalar is calculated by a simple parametrization of the saltation process which depends on the friction velocity (White, 1979). Due to uncertainties in the parametrization of the surface flux, the displayed concentrations of the passive scalar are in arbitrary units. Dust concentrations in the order of magnitude of 0.1 g/m3 have been found for dust devils in field measurements (Renno et al., 2004).
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