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-   -   should i use fea or cfd for thermal analysis? (http://www.cfd-online.com/Forums/fluent/35383-should-i-use-fea-cfd-thermal-analysis.html)

mr. bill January 4, 2005 10:26

should i use fea or cfd for thermal analysis?
 
Hello all, i need to complete analysis of an electronic box which includes an enclosure, pcb and processors, cooling fan, heat transfer via free convection, forced convection, radiation. need to determine component temperatures inside the enclosure.

My question is can i capture the results with an fea package such as nastran (fea) or do i need a cfd package like fluent?

thanks a billion, mr. bill

Aravind January 4, 2005 20:15

Re: should i use fea or cfd for thermal analysis?
 
Hi,

You should use a CFD package instead of FEA package. Since CFD packages can capture the effects of fluid flow better than FEA packages. The case would be different if you are considering conduction only. In that case an FEA package would do a good job.

Aravind

mr. bill January 4, 2005 20:25

Re: should i use fea or cfd for thermal analysis?
 
Aravind thanks for your response. i have nastran and it allows me to enter convection surfaces. is this still not advisable for a convection analysis.

also what about radiation? will fea do okay with radiation if i can input the view factors?

peace

mr. bill

Jonas Larsson January 5, 2005 09:39

Re: should i use fea or cfd for thermal analysis?
 
I'm not at all an expert in electronics cooling, but I'll give my $0.02 anyway. You probably don't don't want a full-featured CFD package like fluent. I'm not sure if you even need a CFD package at all - someone who knows the tools and tricks of electronics colling will have to advice you on that . In any case, if you do find that you need to do CFD computations, there are a bunch of specialized tools that will most likely both produce better results and be easier to use than a general purpouse CFD code.

The leading tool I think is Flotherm from Flomerics www.flomerics.com . Flotherm is closely followed by IcePak www.icepak.com from Fluent. There are also a number of other packages like for example the tools from Maya www.mayahtt.com

You might also want to check out www.coolingzone.com Although that site is a bit affiliated with Flomerics it might give you some more insight.

Good luck.

Pinkey February 6, 2014 06:22

Need a help plaese-ICEPAK 14.5 TOOL
 
Hi All,

I am new to CFD Domain & ICEPAK tool as well.

Can anyone explain me as to how/on what basis the reynolds & peclet numbers are calculated(In solution settings option itself by clicking on the refresh button).

I am working on Finned heat sink model (tutorials).

Please help me out.

Thanks
Pinkey

sivamsakthivel November 18, 2014 00:54

Quote:

Originally Posted by Aravind
;116934
Hi,

You should use a CFD package instead of FEA package. Since CFD packages can capture the effects of fluid flow better than FEA packages. The case would be different if you are considering conduction only. In that case an FEA package would do a good job.

Aravind

Hi Aravindh,

I too face same problem, currently i am using Ansys steady state thermal analysis for free convection. Is there any possibilities to do forced convection in ansys ?? if yes menas how ??

Thanks in Advance. :)


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