[USU_CFDer]

I am trying to patch a linear temperature profile going from 300K at the bottom of my domain to 325K at the top. Does anyone have any ideas on how to do this. The domain is 0.4 meters high so a function for the temperature would look like

T=300+(25/0.4)*y
where y is the distance measured from the bottom. In the custom field functions area I can't find anyway to reference position. And the patch tool doesn't seem to be able to access user defined functions.

Any ideas?

Thanks

[rabetabbevon]

well, I had also similar problem in the past. But I read this post <http://www.cfd-online.com/Forums/fluent-udf/75232-define-profile-inlet_temperature-udf.html> and I could figure out my problem. I hope it helps

[ComputerGuy]

The thing you're looking for is Mesh-->Cell Y Position. There's something like that under custom field functions -- trust me. I don't have Fluent right now, but you can reference the geometric coordinate of a cell. Then, of course, you would need to change your function to be (y-0.4), or whatever the defined Y-coordinate of the bottom of your geometry is (it doesn't have to be 0).

ComputerGuy

Originally Posted by USU_CFDer

I am trying to patch a linear temperature profile going from 300K at the bottom of my domain to 325K at the top. Does anyone have any ideas on how to do this. The domain is 0.4 meters high so a function for the temperature would look like

T=300+(25/0.4)*y
where y is the distance measured from the bottom. In the custom field functions area I can't find anyway to reference position. And the patch tool doesn't seem to be able to access user defined functions.

Any ideas?

Thanks