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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › UDF works in planar option but not axisymmetric › Reply To: UDF works in planar option but not axisymmetric

July 29, 2024 at 2:19 pm
Saurabh R Patil
Ansys Employee

Hi,

In axisymmetric simulations, Fluent automatically accounts for the circumferential integration when calculating fluxes and forces. In an axisymmetric case, the heat flux needs to be interpreted correctly. Fluent handles the circumferential scaling internally, so your calculations need to be adjusted accordingly. Specifically, the heat flux should be divided by 2*pi*r.

Thank you.