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calculation of average nusselt number along a wall surface

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Old   June 11, 2015, 02:38
Default calculation of average nusselt number along a wall surface
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abhishek chakrabarti
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hi, I am simulating a lid-driven cavity flow problem in ANSYS FLUENT. in my case, i am dealing with a square cavity with rigid walls having no inlet or outlet,i.e., the fluid is confined within the cavity.the left wall is moving vertically upwards while all the other walls are fixed in position. now, after the simulation is over, i want to calculate the average nusselt number over the moving left surface. I have done the following: Reports>Surface Integrals>Wall Fluxes>Surface Nusselt Number and then selecting Area Weighted Average from the drop down list but the Nusselt Number I am getting is an absurd value.
can anyone tell me how to do this????
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