[mali28]

I dont expect to get any answer as always but any ways...

I have a cylindrical geometry with varying diameter from top to bottom. I want to specify heat loss condition since the wall is insulated. For that, I need to calculate overall heat transfer coefficient first. For that I need the inside diameter as well. Since diameter is not constant throughout the geometry, I have to find a way of calculating the distance from the centre of geometry up to the wall using UDF.

Can any one help me in this?

Thanks.

[ComputerGuy]

If you can describe your geometry before you run the simulation (it sounds like the equation for a cone), you could simply write a UDF to DEFINE_PROFILE for the heat transfer as a function of cone height.

If you write the equation of your geometry and the heat loss condition, I'll reply with a UDF which will allow you to do what you want.

ComputerGuy

Originally Posted by mali28

I dont expect to get any answer as always but any ways...

I have a cylindrical geometry with varying diameter from top to bottom. I want to specify heat loss condition since the wall is insulated. For that, I need to calculate overall heat transfer coefficient first. For that I need the inside diameter as well. Since diameter is not constant throughout the geometry, I have to find a way of calculating the distance from the centre of geometry up to the wall using UDF.

Can any one help me in this?

Thanks.

[mali28]

Originally Posted by ComputerGuy

If you can describe your geometry before you run the simulation (it sounds like the equation for a cone), you could simply write a UDF to DEFINE_PROFILE for the heat transfer as a function of cone height.

If you write the equation of your geometry and the heat loss condition, I'll reply with a UDF which will allow you to do what you want.

ComputerGuy

Thanks but I got a better solution. I can now calculate the coordinates of the nodes and using that I can get the radius. I got the solution from here:

http://cape-forum.com/index.php/topic,2.0.html

[ComputerGuy]

Yep -- this is virtually the same solution. Glad you got your problem worked out.

Originally Posted by mali28

Thanks but I got a better solution. I can now calculate the coordinates of the nodes and using that I can get the radius. I got the solution from here:

http://cape-forum.com/index.php/topic,2.0.html