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Simulating the convective boundary layer with a dynamic Smagorinsky model

Bopape, M.-J. M., Plant, R. S. and Coceal, O. (2016) Simulating the convective boundary layer with a dynamic Smagorinsky model. In: 32nd Annual Conference of the South African Society for Atmospheric Sciences, 31 Oct - 1 Nov 2016, University of Cape Town, South Africa, pp. 11-15.

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Official URL: http://www.csag.uct.ac.za/training/south-african-s...

Abstract/Summary

A convective boundary layer is simulated with the Smagorinsky model with different variations of the dynamic Smagorinsky model using different grid spacings. One variation of the dynamic model is scale dependent and is thought to be suitable for the grey zones where large eddies and the grid spacing are of similar size. Shortcomings in the Smagorinsky model at lower resolutions are found in all variations of the dynamic model, while at higher resolution all simulations are similar. The results suggest that the choice of the subgrid model is not important when simulating a convective boundary layer because large eddies dominate the flow.

Item Type:Conference or Workshop Item (Paper)
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:67939
Uncontrolled Keywords:grey zone, dynamic model, atmospheric boundary layer, large eddy model

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