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Average Nusselt Number computing

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Old   January 21, 2013, 08:07
Question Average Nusselt Number computing
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Hello CFD F riends , hope ur doing well
well,how to calculate the average nusselt number when we have a partially heated side (wall of cavity for ex. 40% of the height of cavity)?could u give me the formula plz.
Second , i d like to know : when we write a code '' fortran'' for computing average nusselt number ,wats the formula of the nusselt number(average) i mean to get convergence and that's make code stop runing.
third , i d like to get the velocity adimensiona on fluentl ,wats the formula of that please?
thank u so much ,hope u'll helping me very soon
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