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solid fluid coupled interface problem to find out 'h' value?

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Old   August 24, 2017, 02:29
Default solid fluid coupled interface problem to find out 'h' value?
Taiwan,new north city
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Hello guys..
i am doing fluid and solid coupled interface problem to find out the heat transfer coefficient. i have solved the case and got h value.
There are two interface was created by fluent. so if want to calculate h value then which i need to choose?
for example,
Area-Weighted Average
Surface Heat Transfer Coef. (w/m2-k)
-------------------------------- --------------------
all-solid-contact_region-trg -14.667882
contact_region-src 41.948711
in this which interface value i should consider? or i need to calculate the net value?

is reverse flow becuse of following reasons?
1.mesh quality
2.outlet domain is too short.
3.chage pressure outlet to out flow condition (can i set outflow condition if ideal gas was used?)

Reverse flow will affect the solution or it only affect the convergence rate?

thanks in advance...
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Old   August 15, 2019, 10:05
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zhou tong
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have u got the answer? i get the same problem..?
in my case, i have

fluid_solid-src 3788.8446 fluid_solid-trg -3788.7229

and after calculation by hand, i get similar answer around 4000. so i assume in my case, i just need take one of them..

tks advanced.
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Old   September 2, 2019, 01:12
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check which is the fluid boundary .. this are two interfaces one at solid and other at fluid boundary. take readings at fluid boundary. you can check which one is fluid by opening results in cfd post . on top left you can see which wall comes under fluid domain.
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