How can I make an interpolated function?
Dear All,
I am trying to make the heat transfer coefficient function, h(T), with respect to T. I have some sampled data sets as follows: T:: 280 290 300 350 400 h(T):: 2 7 8 12 14 Here, I'd like to make an interpolated function of which name is 'myH.' Where can I setup this kind of function and how can I use it? Many Thanks, SeHee 
Re: How can I make an interpolated function?
Hi,
This is a CEL 1d interpolation expression. It is described in the documentation. Glenn Horrocks 
Re: How can I make an interpolated function?
Dear Mr. Glenn,
Thanks for your comments. I have built my own interpolated function followed by your guide as follows: 1) In CFXPre, Create/User function 2) My function name is 'myHCoeff' 3) Interpolation, One dimensional 4) Input data set: Temperature .vs. heat transfer coefficient 5) OK And when I use this function as boundary condition, how can I express the function? There were some errors to express my defined function when I try to use it. My expression was 'myHCoeff(T).' Is it incorrect? Many thanks, SeHee 
Re: How can I make an interpolated function?
What were the errors?

Re: Error Message
The error message is as follows:
The variable 'T' referenced in parameter 'Heat Transfer Coefficient' in object '/Flow/Domain:Tank/Boundary:TankH/Boundary Conditions/Heat Transfer' does not have one of the required prefixes: phase or particle. Thanks for your help. SeHee 
what is the prefixes: phase or particle?
As I mentioned in the above message, the error message was as follows:
The variable 'T' referenced in parameter 'Heat Transfer Coefficient' in object '/FLOW/DOMAIN:Tank/BOUNDARY:TankH/BOUNDARY CONDITIONS/HEAT TRANSFER' does not have one of the required prefixes: phase or particle. Here, could anyone please explain 'phase or particle'? I've tried many ways for resolving my problem, but I am still stuck at this stage. SeHee 
Re: what is the prefixes: phase or particle?
If you have a multiphase flow, you need to add the phase/particle name before variables. Example:
Air Ideal Gas.Temperature Maybe this is what the error message is referring to? 
Re: solved this problem with input profile.
Considering your comments, I have solved this problem at last as follows:
1. making profile instead of table 2. retype the function > myHCoeff.hval(WireAl.T) where myHCoeff represents the function name of which I defined, hval represents the value of my function with reapect to temperature, and WireAl represents the material name of which I used in my simulation setup. Thanks for all kind comments. SeHee 
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