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Old   January 11, 2011, 22:13
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jlx
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I use Fluent to analyze flow in a flat duct. After calculation, I wanna get Nusselt Number.I have try to get the surface Nusselt number from the plot>xyplot,choose y axis function with wall fluxes, and get the surface Nusselt Number under wall fluxes, but is seems weird. The surface Nusselt Number always appears zero.
After I get the Nusselt Number, I wanna plot the Nusselt Number with X*(dimensionless axial coordinate for the thermal entrance region)

How can I get this plot.Please tell me.

Thx all.
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Old   January 13, 2011, 00:19
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Can anyone give me some information?
Thanks
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Old   January 14, 2011, 14:30
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I think you might be getting zero because your two temperatures are equal, thus giving a zero 'h'. I would think that you can find the local convective coefficient and then calculate Nu...maybe
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