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October 4, 2016, 13:02
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how fluent defines Nusselt number
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#1 |
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New Member
Join Date: Jul 2016
Posts: 1
Rep Power: 0  |
Hi guys
I am new here, and I do not know how FLUENT defines Nusselt number. Could anyone tell me how it defines? I have looked for the definition in the Help tab in FLUENT, but I didn't see any definition for Nusselt number yet. |
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October 6, 2016, 01:42
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#2 |
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Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,836
Rep Power: 68 |
Fluent uses typical definitions.
The simple answer which is 99% correct is: Nu = h*Lref/kref h = q"/(Twall-Tref) Lref, kref, and Tref user specified values in the reference values pane. If you want to know the last 1%, you need to appreciate how the heck do you calculate q" which requires a certain level of knowledge of the FVM method. |
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