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Old   June 27, 2013, 17:35
Question Question about transitional flow
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Hi

Is the transitional boundary layer thicker than the turbulent boundary layer? Could transitional flow cause instability like strong vortex?
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Old   June 28, 2013, 04:15
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No. But if there is separation, it can be .
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Old   June 28, 2013, 04:58
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Quote:
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No. But if there is separation, it can be .
How do you define BL separation? If the BL is separated from the wall due to the discontinuity of the wall geometry, would you also call it 'BL separation'?
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Old   June 28, 2013, 05:04
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If the BL is separated from the wall due to the discontinuity of the wall geometry, I think this statement is wrong, Flow Separation depends on fluid property, Geomety, surface roughness
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Old   June 28, 2013, 05:06
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Refer Boundary layer theory by schlichting
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Old   June 28, 2013, 05:21
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Quote:
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If the BL is separated from the wall due to the discontinuity of the wall geometry, I think this statement is wrong, Flow Separation depends on fluid property, Geomety, surface roughness
I meant: like there is a 90 degree corner, then due to this discontinuity of the geometry, the BL fly away. Could we also call this as BL separation?
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Old   June 28, 2013, 05:29
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both are different dont confuse wall separation and flow separation
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Old   June 28, 2013, 05:31
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Use LES model to capture exact flow separation
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