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demarcation between high Re number and Low Re number

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Old   March 31, 2021, 04:24
Question demarcation between high Re number and Low Re number
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Hi,
what is the clear demarcation between Low Re number and High Re number? because if I don't know what is high and what is low, how do I decide what value of y+ to target.

For eg: I have flow inside cooling channels vs flow around a bike vs natural convection inside an enclosure,
what y+ to target where?

Please help.
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cfd, meshing, reynolds number, turbulence, y+ value

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