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Catetrib October 2, 2008 10:14

laminar or turbulent in thermal management
 
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

doki October 3, 2008 07:55

Re: laminar or turbulent in thermal management
 
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.

Ahmed October 4, 2008 06:17

Re: laminar or turbulent in thermal management
 
Calculate the Rayleigh Number (=GrPr), the transition value from laminar to turbulent is given in heat transfer textbooks.

Ahmed October 4, 2008 06:20

Re: laminar or turbulent in thermal management
 
An open invitation to doki Please review your comment

lyes43 February 8, 2011 04:56

salam
 
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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