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  3. Fluent UDF Interpreter not recognizing temporal terms

Fluent UDF Interpreter not recognizing temporal terms

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    • May 11, 2025 at 12:12 am
      Harshawardhan Patil
      Subscriber

      Hello Folks,

      I am trying to do a simulation of blood flow within an artery in CFD. Using some inspiration from the ANSYS tutorial shown here, I want to use a user-defined pressure-inlet profile on the same geometry (as opposed to the velocity-inlet used in the tutorial). I have defined the pressure-inlet according to the following polynomial regression (shown in image 1). In Image 2, the corresponding interpreted UDF is attached.

      Keeping all other setup conditions same (k-w SST Model, Coupled Scheme) and 930 time steps of 0.001 sec each, the results for pressure profile at inlet are nowhere close to what it should be. Image 3 shows the total pressure at the inlet and it seems that the UDF only read the y-intercept of the regression curve, 9.0745 mmHg. Can anyone guide me as to what is going wrong?

      Thanks,

      Harshawardhan Patil

       

       

       

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