How to obtain average Nusselt number
I have problem on how to obtain average nusselt number on a isothermal flat plate
I conducted numerical simulation (discretized governing equations and fed input datas are in non dimensional form) and got temperature distribution on this isothermal flat plate.According to the textbooks; Nusselt number is equal to non-dimensional temperature gradient on the surface
like I said above, I got non-dimensional temperature distribution on isothermal flat plate from numerical calculation and I took temperature difference for every nodes on the plate surface and divided that difference to the non dimensional distance between wall node and first calculated domain node(which is first neighbour node to the isothermal wall node)
I have attached an image below to show you what I did to get nusselt number
when I get every nodes nusselt number, in order to get average nusselt number distribution, I summed them all and divided to total number of nodes.
I wonder if this way correct or not?
all of your valuable comments are appreciated
Thanks in advance!
Average Nusselt number
The way that you have mentioned for calculating the average Nu number is wrong.
I have written the correct formulation in an attached file.
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