Learning Forum

[Ahmed Eissa]

Hi, I am trying to calculate the residence time. Firstly, can I use pathline time?

Secondly, I followed all the steps here getsolutionfile (ansys.com) and the UDS residuals are ALWAYS ZERO, what should I do? TBH, I am not sure about step 5. Below are screenshots of my entries.

 

Thanks a lot.

[Prashanth]

Hi: You are supposed to hook that source to the user scalar source term

[Ahmed Eissa]

Thank you so much.

So instead of using mass source, I will be using scalar sourcem right?

If so, I think we may need to change step 5 in the pdf file mentioned above. 

5. Under Source Terms, enable (Mass) sources and specify the fluid density (If the density varies by location, you can use a UDF).