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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Algor CFD on electronic enclosure

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10-04-2011 08:20 AM

Hi,

 

I have an electronic enclosure and I want to do a airflow model. When modelling the enclosure, I havemade internal fluid generation and deactivated all the other parts inside the encosure to do the analysis. But in the results menu how can I see the flow over the parts inside the enclosure as the parts are deactivated. Am I doing it in a wrong way? Please help.

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Employee
hupn
Posts: 44
Registered: ‎04-15-2011

Re: Algor CFD on electronic enclosure

10-04-2011 10:59 AM in reply to: robinsmk

Hi,

 

Are you trying to look at the internal results values? Using slices plane should help you to view the results if so. You can change the location and oritentation of the slices plane. When you created the mesh by using internal fluid generation, the non-fluid parts are not in the simulation domain and automatic wall boundary conditions generally are applied on the boundary surfaces, which means no physical meanings when just want to look at the values on those boundary interface.  

 

hup

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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Re: Algor CFD on electronic enclosure

10-04-2011 11:06 AM in reply to: hupn

Thank you for the reply.  My model have around 8 solid components inside the enclosure. So what i did was to generate the fluid internally. So a new fluid part is added. Now I did was to deactivate all the remaining components inside the enclosure and put the fluid part active for analysis. I hope I am going in the right direction.

 

At the results menu i made the fluid part transparent so that i can view all the components inside it ( which I deactivated). Is there a way to show these internal components so that i can show a streamline view in my presentations.

 

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Employee
hupn
Posts: 44
Registered: ‎04-15-2011

Re: Algor CFD on electronic enclosure

10-04-2011 12:17 PM in reply to: robinsmk

Hi,

 

I think the way you created the fluid model is right. Noticing that those disabled parts are not in the fluid simulation domain, so there are not results shown inside those components. You can create slice plane to cut through those internal part and use streamline to view the fluid results flow around them though.

 

hup

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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Re: Algor CFD on electronic enclosure

10-04-2011 01:25 PM in reply to: hupn

thank you. I have added the slice plain. and I can see the flow fields although I cannot physically see the solid models inside the enclosure. this will work.

 

 

 

another issue following this is that . I have a heat sink inside the enclosure. How can I model the flow between the fins. How do you create tht smaller mesh near to the fins. Also, the heat sink have a seperate fan section. Using the 3d internal flow generation is it possible to add a fan inside the fluid field? 

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Employee
hupn
Posts: 44
Registered: ‎04-15-2011

Re: Algor CFD on electronic enclosure

10-04-2011 02:12 PM in reply to: robinsmk

Hi,

 

I not quite sure about your second issue. If the heat sink has no effect to fluid flow, then you can just ignore it for fluid flow analysis. When you do heat transfer analysis, you can use the fluid flow results to performance a one-directional analysis (fluid to thermal). If the heat sink do have effect to the fluid flow, you may need a two-directional coupling analysis.

 

To create finer mesh around the fin, one way is to specify some refinement points for the fin surface by either (1) specify the coordinates of those points or (2) pick the mesh points on the fine surface if you already have a mesh. Fan surface is only available for the surfaces between parts or boundary surfaces. Therefore, it is really depends on the model whether you can create one or not.  

 

hup

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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Re: Algor CFD on electronic enclosure

10-10-2011 09:50 AM in reply to: robinsmk

Thank you for the replies. I was trying to model it but still have problems. Attached is the model file. Please take a look into it. Am attaching the file 

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Employee
hupn
Posts: 44
Registered: ‎04-15-2011

Re: Algor CFD on electronic enclosure

10-10-2011 11:02 AM in reply to: robinsmk

Hi,

 

I do not have Solidworks installed here, so I could not open your CAD model. Can you transfer it into a .sat or .stp file? And please give more detail information about the issue that you experienced so we could look into it.

 

hup

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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Re: Algor CFD on electronic enclosure

10-10-2011 12:22 PM in reply to: hupn

this is an electronic envlosure. It have a fan surface blowing air into it( the bigger hole). Then exits at the other end ( the small holes). I created the internal flow. But I cannot see the internal components. Attached is the file.

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Contributor
robinsmk
Posts: 15
Registered: ‎10-04-2011

Re: Algor CFD on electronic enclosure

10-10-2011 12:27 PM in reply to: robinsmk

Also, Why i cannot create flow inside this box?

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