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Wall roughness and Elog

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Old   February 2, 2009, 10:38
Default Wall roughness and Elog
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This question has been possed a couple of times with no satisfactory answer. Does anyone know how to relate actual wall roughness(k)or sand grain roughness to the Elog value used in the k-epsilon model of some codes? i am using a code called Flo++ and need to incorporate wall roughness effects. Thanks in advance
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