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January 19, 2012, 11:10
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y+ question
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New Member
RW
Join Date: Nov 2011
Posts: 22
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Hi all,
From what I understand about LES wall functions, in order to use nuSgsWallFunction you should have a y+ > 30 which places your first computational cell away from the wall within the inertial sublayer.... My question is... does the wall function take into account if you have a y+ < 30 (i.e. your grid is finer 'than necessary' near the wall)? Couldn't Spaldings law (which I understand is the assumption made for the nuSgsWallFunction) just be extended to adjacent cells up to those cells which have the value of y+ required? Hope this question makes sense.... Also, what are the alternatives to this wall function in OpenFOAM? Hope someone can help. Thanks for your time. Cheers, plm |
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January 21, 2012, 12:14
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#2 |
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New Member
RW
Join Date: Nov 2011
Posts: 22
Rep Power: 15 |
Any ideas anyone?
Does anyone have experience with LES wall functions for low y+? plm |
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