about boundary layer and turbulence modeling
Hi. I'm coping with this fact: what should be the extent of the extrusion layer ?
I mean, i'm using a standard k-e model, with a standard wall function (local Re is high), how much space have i to take in account for the boundary layer ? i thought a 3-layer with a thickness of 0.5(what are these numbers about ? Are maybe referred to the min and max cell lenght of the import geometry?) should be good... Is there a way to calculate easy the boundary layer thickness ? I tried with the method y+ ='friction velocity * wall distance / dynamic viscosity, but i obtain nothing... any ideas ? |
Re: about boundary layer and turbulence modeling
15
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Re: about boundary layer and turbulence modeling
15 what ?
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Re: about boundary layer and turbulence modeling
furlongs
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Re: about boundary layer and turbulence modeling
it's a joke or an elegant way to say that i'm asking too much with too little detail ?
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Re: about boundary layer and turbulence modeling
it's a bad joke, it is monday after all.....
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Re: about boundary layer and turbulence modeling
yeah, you're right...
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Re: about boundary layer and turbulence modeling
If you make the the cell reynolds number 1500 you generally get a decent Yplus for wall functions.
length is near wall cell height velocity is an estimate of the average free stream velocity |
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