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March 26, 2016, 15:04 |
How to evaluate Nu-average
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#1 |
Senior Member
Join Date: Jan 2011
Posts: 339
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Hello I am wondering how I can estimate average Nusselt number from Fluent for flow through a duct like the equation appear at the image attached?
Thanks |
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March 28, 2016, 10:07 |
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#2 |
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March 28, 2016, 10:44 |
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#3 |
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Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
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You can go under reports, do a surface integral of Nusselt number.
You can't do exactly what you have written (by integrating the average Nu at a given section) because that is for 1D flow, and Fluent is 3D. There is no convenient average Nusselt number at a cross-section because a cross-section is not conveniently generalizable to 3D. |
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March 28, 2016, 10:49 |
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#4 | |
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Thank you for the reply. I do not mean exactly what I mention at the relation actually I am running 3D channel and want to know how I can predict Nusselt average on it? You mean I need to find integral for Nusselt over the overall domain? is that will represent Nu average?
Quote:
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March 28, 2016, 23:10 |
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#5 | |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
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Quote:
For example, an area-weighted average integral as you have written. |
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