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Simulate heat transfer of heat sink in a box... |
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November 6, 2009, 11:21 |
Simulate heat transfer of heat sink in a box...
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#1 |
New Member
Lim Wah Chien
Join Date: Nov 2009
Posts: 5
Rep Power: 17 |
Hi all CFD EXPERTS,
I am newbie for cfd, currently using ansys11.0, my situation is there is a box with 2 inlets (side) for air flow in and 1 inlet for air flow out (top), the heat sink is put at the base and middle of the box, the heat source is placed below the heat sink. I need to compare the performance of various heat sink through natural air. However, I just know to set the basic thgs such as inlet and outlet.. The 2 inlets velocity i set for the box is 1m/s, outlet i set to 0 relative pressure.The default of the domain is fluid fluid domain which is the heat source. For my case, i thk my default domain should solidfluid domain, can i change the default?? Or is my region gt prob?? Since , i try many times also fail to change the default, i create another domain for the solid fluid. I run the analysis, the simulation success, bt the graph of the result i din understand. Anyone can tell me can go where to understand the graph ?? When post the result, the flow of the air din show out... my supervisor say is time scale problems..bt i try to increase the time scare, the flow also din show out.. This is my final year project, bt tis software nvr teach in cls.. So i blur v it..anyone can teach me how to solve tis ?? Can teach me solve the domain problem?? Any suggestion can giv me to improve the simulation?? pls help me... |
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November 6, 2009, 11:53 |
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#2 |
Senior Member
Matthias Voß
Join Date: Mar 2009
Location: Berlin, Germany
Posts: 449
Rep Power: 20 |
hi,
could you post a scheme of your problem? i didnīt get it. Solid Fluid?? I suppose you have a room with to inlets for air and one pressure outlet/openning AND an energy source in a solid domain at the ground of the solid domain. Are you interested in the temperature of the solid? If not, you could simplify your setup and just add a source at the former solid/fluid-interface. And which "graph" is it that you didn't understand? neewbie |
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November 6, 2009, 12:25 |
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#3 | |
New Member
Lim Wah Chien
Join Date: Nov 2009
Posts: 5
Rep Power: 17 |
Quote:
i wan to know hw efficiency the heat sink can transfer d heat if in a room like that... |
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November 6, 2009, 12:47 |
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#4 |
New Member
Lim Wah Chien
Join Date: Nov 2009
Posts: 5
Rep Power: 17 |
1st photo is my model.. The fluid fluid domain shown at the heat sink base... another rectangular box below heat sink is the heat source..
2nd photo is the graph i mean.. Dun knw why, got heat transfer 1 n 2..momentum 1 n2 , turbulence 1 n 2... i set wrong thg?? all tis graph i din understand...wat is meaning if the heat transfer graph like that?? |
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November 7, 2009, 06:39 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,844
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It looks like you are solving the fluid equations in both domains. If I understand you correctly you will need to set your heatsink to a solid domain.
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November 7, 2009, 07:02 |
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#6 |
New Member
Lim Wah Chien
Join Date: Nov 2009
Posts: 5
Rep Power: 17 |
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November 7, 2009, 07:04 |
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#7 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,844
Rep Power: 144 |
You are doing a Conjugate Heat Transfer (CHT) simulation, see the heating coil tutorial for how to set them up.
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November 7, 2009, 07:11 |
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#8 |
New Member
Lim Wah Chien
Join Date: Nov 2009
Posts: 5
Rep Power: 17 |
The tutorial i done many times d.. I still not familiar to set the domain, subdomain and domain interface.. That y i ask experts here..
Summore tis simulation have 1 heat source below d heat sink... heat source n heat sink contact... hw the set that the heat source transfer heat to heat sink?? and the heat sink dissapate the heat to air??? Last edited by chien87; November 7, 2009 at 07:41. |
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February 8, 2011, 04:50 |
re
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#9 | |
New Member
lyes
Join Date: Feb 2011
Posts: 24
Rep Power: 15 |
Quote:
I havethe experimental results to valid my reult saiting ur answer thx. lyes43@yahoo.com |
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