|December 21, 2012, 04:00||
How to find Mean Nusselt Number?
Join Date: Dec 2012
Posts: 1Rep Power: 0
I am doing an computational analysis on natural convection heat transfer through rectangular fins attached to a wall. After the simulation, Surface Nusselt number for hot wall which I am getting in higher than (twice) the experimental results. The way I am following for finding the mean nusselt number is : Report--> Surface Integrals-->Facet Average-->Wall Fluxes-->Surface Nusselt number.
Please provide me the solution. Also let me know whether I am using the right way of finding the nusselt number or not. If not then please provide me an alternate way of finding the Average Nusselt Number.
|December 22, 2012, 03:24||
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 1,271Rep Power: 20
1) Heat transfer coefficient needs a reference temperature
2) Nusselt number needs a reference length scale.
Both of these reference quantities are specified on the reference values task pane. Did you remember to specify them?
I have always used area-weighted average and not facet average, but I believe they yield similar results. You should be able to get the average Nusselt number the way you are doing.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Average Nusselt Number||kamran651||FLUENT||8||April 2, 2016 08:41|
|same geometry,structured and unstructured mesh,different behaviour.||sharonyue||OpenFOAM Running, Solving & CFD||13||January 2, 2013 23:40|
|there is a problem with fully developed Nusselt number||eeman||Fluent UDF and Scheme Programming||4||September 24, 2012 01:36|
|CFX problem in ubuntu (linux)||Vigneshramaero||CFX||0||July 13, 2012 10:22|
|snappyHexMesh won't work - zeros everywhere!||sc298||OpenFOAM Native Meshers: snappyHexMesh and Others||2||March 27, 2011 21:11|