4 Replies Latest reply on Jun 19, 2015 2:30 AM by Muoi Vu

Flow modeling for Air cooler assembly

Muoi Vu Jun 10, 2015 4:20 AM

Dear all,

Currently i have one model simulate air cooler for generator.

Actually the cooler contain ~400 pipes. There is one blower put at inlet ~3.3m3/s.

The housing normally generates heat ~50000W.

I would like to check the cooler performance but seem there is issue with BC set up and fluid zone.

I can not set up goal for air temperature in housing.

and after i did the analysis with transient, try with cut plot, there is no information temperature for housing.

Please have a look and advise.

Tks,

Re: Flow modeling for Air cooler assembly

Shivani Patel Jun 17, 2015 11:30 AM (in response to Muoi Vu)

Try steady state. Maybe the transient time isn't long enough to see a large temperature change.

I would also take a look at your mesh size. Is it too large? You want finer elements around and through the pipes. Try Local Initial Mesh.

I don't exactly understand what temperature goal you're trying to apply. Try a volume goal for fluid temperature in the housing. Model in a dummy solid and use component control to keep it out of the analysis.
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- Re: Flow modeling for Air cooler assembly
  
  Muoi Vu Jun 19, 2015 2:29 AM (in response to Shivani Patel)
  
  Thanks Shivani,
  Let me try to reduce mesh.
  Tks,
  
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Re: Flow modeling for Air cooler assembly

Amit Katz Jun 18, 2015 1:58 PM (in response to Muoi Vu)

This looks like a very detailed model, will take a lot of compute time to model and sim accurately. I would recommend starting out with a simplification, replace the pipes with a porous medium and see how to best gage the heat transfer with the trapped hot air.
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- Re: Flow modeling for Air cooler assembly
  
  Muoi Vu Jun 19, 2015 2:30 AM (in response to Amit Katz)
  
  Thanks Amit,
  Actually i do with simple model and it work good.
  Now when i add more Real wall condition, it works now.
  Thanks
  
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