Learning Forum

[Abaid Rehman]

Hello Everyone,

I'm researching coronary artery disease and simulating parabolic velocity profiles in ANSYS Fluent. My goal is to distribute the flow into three outlets, with 96% going to one outlet and the remaining 4% divided between the other two. Initially, I set the mass flow rate outlet boundary conditions, but I noticed that the maximum velocity obtained was 0.04, which is higher than the intended 0.008. However, when I applied a zero pressure gradient at outlet boundary conditions, then the maximum velocity was consistent with the expected value of 0.008. What might be causing this discrepancy? Any assistance would be greatly appreciated. I also need a UDF fo Windkessel Model for artery modelling. 
The link of the image is http://vascularmodel.org/dataset.html#0  (0148_H_CORO_SV
GD)

Thank you.

[Rob]

Where was the peak velocity seen? Those small channels look fairly small, have you got sufficient mesh over them?