Useful LES tools in Fluent - Part 3
Posted October 21, 2013 at 08:06 by sbaffini
Updated December 21, 2016 at 10:08 by sbaffini (Update)
Updated December 21, 2016 at 10:08 by sbaffini (Update)
These are the implementations of two static SGS models, due to Vreman and Nicoud (see the attached files for the detailed references). These models are in the same spirit of the well known WALE model; still, they are different in several aspects.
The models are provided without any kind of warranty; still, no specific problem came up during testing.
For wall bounded turbulent flows in Fluent i strongly suggest the Vreman model due to its specific, theoretically wrong, near wall behavior. The SVD model, in contrast, seems to behave much like the dynamic Smagorinsky model and possibly worst. However, the SVD model is the first one i met that, in Fluent, provides a full y^3 near wall behaviour for the tangential stress, independently from the grid.
I will soon update this post with some plot.
The models are provided without any kind of warranty; still, no specific problem came up during testing.
For wall bounded turbulent flows in Fluent i strongly suggest the Vreman model due to its specific, theoretically wrong, near wall behavior. The SVD model, in contrast, seems to behave much like the dynamic Smagorinsky model and possibly worst. However, the SVD model is the first one i met that, in Fluent, provides a full y^3 near wall behaviour for the tangential stress, independently from the grid.
I will soon update this post with some plot.
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