heat trasnfer coefficient
I am looking for any equation to calculate the heat transfer coefficient for the following case:
A cuvette made of metal and inside there is water (in a batch system). Outside of the cuvette there is water flowing for heating the inside content of the cuvette.
I think this case corresponde to forced convection, and for this case I could use the Nusselt number for external flows:
Nu = 0,66*Re^(1/2) * Pr^(1/3).
then: heat transfer coefficient = Nu*k / L
But I don't know what equivalent length (L) I shoul use for it. The corresponing one to where the external fluid is moving or the cuvette wall thickness?
And also for calculating the Reynolds number, I don't know either, since inside the cuvette the water is not moving.
Thank you very much!.
you might want to look into flow over a cylinder. You might be able to find a lot of the answers there.
It seems to me the geometry is confusing you, attach a picture, may be we could help
Convection Heat Transfer
hi someone have or know where I can found the solution manual of book Convection Heat Transfer, third edition of author Adrian Bejan, because I need very much in my pos- graduate , thanks.
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The correlation which you are using is for the case when fluid is attached (or in direct contact) with (long) flat plate. However as far as I understood your problem the correlation shall give you overestimate of the heat transfer. The fluid which is flowing shall create a recirulation in the cavity and the Nu relationship shall notconvey the physics. I will suggest you to look at the literature on OPEN LID CAVITY PROBLEM.
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