How to define velocity profile to wall of circle

Tufan Tuna · April 16, 2021, 14:24

I want to give tangential velocity input to wall of circle. Every face have different velocity input value according to its angle from center of origin. How can I write udf for that. I did not find any example of it. I don't know how to find location of face on the circle edge. Appreciate for all your help

pakk · April 16, 2021, 14:31

Did you find the example for parabolic profile?

It shows how to get location of a face.

The rest is just mathematics...

Tufan Tuna · April 23, 2021, 11:37

How do I create a function in the udf? I have to use legendre polynomials and associated legendre functions

April 16, 2021, 14:24	How to define velocity profile to wall of circle	#1
Tufan Tuna New Member Tufan Tuna Köseler Join Date: Oct 2020 Posts: 5 Rep Power: 6	I want to give tangential velocity input to wall of circle. Every face have different velocity input value according to its angle from center of origin. How can I write udf for that. I did not find any example of it. I don't know how to find location of face on the circle edge. Appreciate for all your help

April 16, 2021, 14:31		#2
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 27	Did you find the example for parabolic profile? It shows how to get location of a face. The rest is just mathematics... __________________ "The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform" is NOT the error after compiling. It is the error after loading. To see compiler errors, look at your screen after you click "build".

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April 23, 2021, 11:37		#3
Tufan Tuna New Member Tufan Tuna Köseler Join Date: Oct 2020 Posts: 5 Rep Power: 6	How do I create a function in the udf? I have to use legendre polynomials and associated legendre functions