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November 27, 2016, 23:46 |
Problem in convection Boundary condition
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#1 |
New Member
neda
Join Date: Nov 2016
Posts: 4
Rep Power: 9 |
Hi everybody,
I am modeling a window-blind system in a building in both 2D and 3D modeling. When I use convection B.C for window surface to apply the heat generation rate, there is a problem. The heat generation rate dose not effect on my results and there is no heat transfer on outer surface of the window !!!! I am using single fluid phase. |
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November 28, 2016, 04:43 |
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#2 | |
Senior Member
Onur Özcan
Join Date: Feb 2016
Location: Istanbul/Turkey
Posts: 461
Rep Power: 12 |
Quote:
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November 28, 2016, 09:11 |
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#3 | |
New Member
neda
Join Date: Nov 2016
Posts: 4
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Quote:
I have the same problem for my 3D model as well. I was wondering if I need to define thickness for the boundary with convection assumption or it works for a window without thickness? |
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November 28, 2016, 09:13 |
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#4 |
Senior Member
Onur Özcan
Join Date: Feb 2016
Location: Istanbul/Turkey
Posts: 461
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thickness is useless for convection.But if you wonder what happen in conduction, you need to activate and specify it.
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November 28, 2016, 11:55 |
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#5 |
New Member
neda
Join Date: Nov 2016
Posts: 4
Rep Power: 9 |
I thought maybe because it is the volumetric heat generation and my boundary is face so it dose not work. However so far I tried with and without thickness but there is no difference. I am confused. it seems a easy model but there is a problem that I ca not find it yet.
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November 28, 2016, 12:51 |
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#6 | |
Senior Member
Onur Özcan
Join Date: Feb 2016
Location: Istanbul/Turkey
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Rep Power: 12 |
Quote:
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December 4, 2016, 10:23 |
Thanks for your reply, there is still question
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#7 |
New Member
neda
Join Date: Nov 2016
Posts: 4
Rep Power: 9 |
Yes I got it. But there some thing that is confusing. In my new case for 2D and 3D model I can see changes in the results when I am changing the heat generation rate but the results fir 2D and 3D model are different for a particular model. According your answer it was that the results for 3D model is accurate. But for even 2D or 3D model when the boundary with "heat generation rate" condition dose not have thickness the heat generation rate doesn't work and I don't know why? it is convection not conduction
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