Simulate heat transfer of heat sink in a box...
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??:confused: 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 ?? :confused: 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..:confused: 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 ?? :confused: Can teach me solve the domain problem??:confused: Any suggestion can giv me to improve the simulation?? :confused: pls help me... |
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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i wan to know hw efficiency the heat sink can transfer d heat if in a room like that... |
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..
http://i187.photobucket.com/albums/x...6/untitled.jpg 2nd photo is the graph i mean.. http://i187.photobucket.com/albums/x148/lyc86/graph.jpg 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?? |
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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You are doing a Conjugate Heat Transfer (CHT) simulation, see the heating coil tutorial for how to set them up.
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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??? |
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I havethe experimental results to valid my reult saiting ur answer thx. lyes43@yahoo.com |
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