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Old   August 2, 2012, 05:31
Default low Reynolds number problem
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john
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pls anybody could tell me how can i define Reynolds number in a forced convection over 4 planar heat sources placed in line inside a test section of a wind tunnel?
the Re curresponds to flow over a flat plate is very low. but its not getting converged in laminar model of FLUENT.
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Old   August 2, 2012, 06:21
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The characteristic length for the flow over blunt bodies is usually the width of the body.
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Old   August 7, 2012, 13:55
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the heat source is similar to flat plate. but 4 such heat sources are arranged in tandem with a gap of 10 mm between them. so can i consider its total length or length of single heat source for defining the Reynolds number?
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Old   August 8, 2012, 04:01
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Why is it so important to define a Reynolds number for this case?
For complex flows, the choice of a characteristic length is quite arbitrary.
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