Convection Heat Transfer

[Fairy]

For the purpose of convection Boundary condition, is it necessary to define the convection coefficient? I only have a time based value, but for some reason the program would not let me define a table of the convection coefficient.
Could anyone help

 

[Twoballcane]

What software are you using? And yes you will need to calculate the h.

Tobalcane
"If you avoid failure, you also avoid success."

 

[Fairy]

I am using Ansys version 11.
It is not simple to find one single value for h. I am modelling a real test and have about 8000 values (over time) for the surface temperature!

 

[Twoballcane]

Oh ok, I have never used Ansys, I typicaly use Flotherm for this application. for the surface temp, can you avarage it out or is there a huge delta between them? It is sounding more like a transient probem than steady state.

Tobalcane
"If you avoid failure, you also avoid success."

 

[IRstuff]

I suggest that you RF this posting and re-post in the ANSYS forum.

Nonetheless, if your analysis program does the FEA, then the effective htc should flow out of the analysis.

TTFN

FAQ731-376