# laminar or turbulent in thermal management

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 October 2, 2008, 10:14 laminar or turbulent in thermal management #1 Catetrib Guest   Posts: n/a How do I decide between laminar or turbulent modeling in case of the thermal management of an electronic box (or similar) where fluid motion is driven only by convective fluxes? Re number doesn't seem to be useful. What about Grashof number? Thanks

 October 3, 2008, 07:55 Re: laminar or turbulent in thermal management #2 doki Guest   Posts: n/a well generally in natural convection problems, the flow is driven by thermal energy, so as there is no momentum-driven flow, you can use either laminar or turbolent assumptions.

 October 4, 2008, 06:17 Re: laminar or turbulent in thermal management #3 Ahmed Guest   Posts: n/a Calculate the Rayleigh Number (=GrPr), the transition value from laminar to turbulent is given in heat transfer textbooks.

 October 4, 2008, 06:20 Re: laminar or turbulent in thermal management #4 Ahmed Guest   Posts: n/a An open invitation to doki Please review your comment

 February 8, 2011, 04:56 salam #5 New Member   lyes Join Date: Feb 2011 Posts: 24 Rep Power: 7 hey ahmed I'm new user of FLUENT and GAMBIt and I 'm working on simulation of mixed convection in a rectangular horizontal channel contain heat sources ex electronic compounents maybe u help me to simulate that problem using any Code or program i have expirimental results to valid my results waiting ur reply thx. lyes43@yahoo.com

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