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calculate avg nusselt no. for 2d convective heat transfer problem

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Old   August 20, 2014, 10:43
Default calculate avg nusselt no. for 2d convective heat transfer problem
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saurabh gupta
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My problem is related to convective heat transfer in 2d lid cavity. left wall is taken as lid. i am trying to calculate nusselt number in following way, correct me if i am doing it in wrong way.
1) Nu = hL/k , h=q/(Th-Tc)
2)i took value of q of lid wall from surface integrals<area weighted avg<wall flux<total surface heat flux.
3)then calculate value of h and then calculate value of Nu by putting value of h and k(of fluid).

Is it correct?
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Old   August 20, 2014, 19:37
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f_alafoo
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Yes it's correct, but becareful if you are measuring Total average Nu number or local Nu number
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Old   August 25, 2014, 06:14
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Thank you for your response. I am measuring avg nusselt number along a wall. I have calculated surface integral of heat flux through wall, that means average nusselt number.. Is it so?
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