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simulation of a fan...plz help

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Old   July 13, 2006, 04:01
Default simulation of a fan...plz help
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pankaj chaddah
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I want to define a rotating fan, but am not able to fand the proper boundary condition to apply for this purpose. i am using GAMBIT as the preprocessor... can anybody help me???
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Old   July 13, 2006, 04:58
Default Re: simulation of a fan...plz help
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Rafa
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have you tried with ansy? in my opinios is better
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Old   July 13, 2006, 07:14
Default Re: simulation of a fan...plz help
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pankaj chaddah
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i dont have that software available with me and couldnt find details on simulation of fan anywhere... if anyone cud help me i would be very happy
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Old   July 13, 2006, 09:43
Default Re: simulation of a fan...plz help
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Seeker Phil
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I know that you can use the rotating frame of reference model to simulate the motion of the fan blades. Look at one of the tutorials on rotating frames of reference
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Old   July 13, 2006, 12:34
Default Re: simulation of a fan...plz help
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Vivek
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You can model a in 3-4 different ways in fluent with increasing orders of computational effort and accuracy. I have listed them choose according to your requirements. 1. "fan" BC in fluent - all u need to do is create a circular surface where the fan sits and apply this BC. Like you would expect this is the least accurate. 2. Multiple Reference Frame method - here u need to use the actual fan geometry and create a volume around it to use as a MRF zone. The size of the zone is critical for accuracy See fluent guidelines 3. Sliding mesh - it is the most accurate and most computationally intensive method. Start with the solution of the MRF method. it models flow as unsteady. 4. You can write your own UDFs for a fan
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