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Forum: Main CFD Forum

January 18, 2013, 08:16

Replies: 17

Why y+ < 1

Views: 5,507

Posted By FMDenaro

again, what you addressed is a result of a...

again, what you addressed is a result of a statistical theory... then, if you solve for the statistical variable, as in RANS, what you say can be somehow right. But for other formulation you do not...

Forum: Main CFD Forum

January 18, 2013, 06:02

Replies: 17

Why y+ < 1

Views: 5,507

Posted By FMDenaro

I think that the key is to forget for a while the...

I think that the key is to forget for a while the theoretical results for turbulence over flat plate/channel/pipe .... in practical applications is so rare to have some boundary that can be "assumed"...

Forum: Main CFD Forum

January 18, 2013, 05:45

Replies: 17

Why y+ < 1

Views: 5,507

Posted By FMDenaro

Actually, I wrote O(1) ... resolving with some...

Actually, I wrote O(1) ... resolving with some grid point below y+=1 is a sort of guarantee that you are able to solve the boundary layer profile taking into account for an accurate evaluation of the...

Forum: Main CFD Forum

January 17, 2013, 11:03

Replies: 17

Why y+ < 1

Views: 5,507

Posted By FMDenaro

The key, is to see y+ as a local Reynold number...

The key, is to see y+ as a local Reynold number based on the computational grid length. y+ = O(1) means that you are able to solve in a region where the diffusive (and dissipative) effetcs are of the...

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