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Old   August 19, 2008, 04:45
Default Where to measure y+
Ken-Robert Jakobsen
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Where should I calculate/report my y+ in for instance a backward-facing step flow, where the friction velocity (and thus y+) varies greatly throughout the domain due to boundary layer separation, reattachment and recovery. In the literature, people always report one single y+, but is this for instance taken at a specific point in the domain, is it the single highest y+ along the given wall, or maybe an average?

Thanks for any help!


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Old   August 19, 2008, 19:25
Default Re: Where to measure y+
Lupco Dukovski
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Take the maximum y+ value along the wall. This will give a good indication of the quality of the simulation.
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