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-   -   low Reynolds number problem (http://www.cfd-online.com/Forums/fluent/105540-low-reynolds-number-problem.html)

johnpaulcd August 2, 2012 04:31

low Reynolds number problem
 
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.:confused:

flotus1 August 2, 2012 05:21

The characteristic length for the flow over blunt bodies is usually the width of the body.

johnpaulcd August 7, 2012 12:55

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?

flotus1 August 8, 2012 03:01

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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