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Old   November 3, 2008, 08:21
Default yplus at high Re
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Sachin
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I am dealing with a high pressure(250 bar, 600-800K temp) supercritical water flow through a channel. i want to know, what will be the range of y plus at Re(50000 to 70000). thanks
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Old   November 3, 2008, 14:05
Default Re: yplus at high Re
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John S.
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Y+ is grid dependent.
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Old   November 3, 2008, 15:01
Default Re: yplus at high Re
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sachin
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in my case, mesh is corse with boundary layers not much refinement at the wall. using k-epsilon model with scalable wall functions. after postprocessing the results i got yplus in the range of 2000 to 2500. i dont know it is correct or not. local Re is in the range of 50000 to 70000
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Old   November 3, 2008, 17:42
Default Re: yplus at high Re
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Glenn Horrocks
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Hi,

Do a mesh sensitivity check to determine if this y+ value is OK.

Glenn Horrocks
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Old   November 4, 2008, 07:39
Default Re: yplus at high Re
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sachin
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thanks glenn and john
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Old   November 11, 2008, 10:44
Default Re: yplus at high Re
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pratik mehta
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I think you really need to make hybrid mesh . It seems from your values of Y plus, you don`t have one, any ways try to get a bit closer to the wall, determine your first cell height some iterative procedure,

I am sure you will get good results
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