Hi guys,

I am working on simulating swirling flow flowing through the circular duct using solidworks flow simulation.

I could get the axial and circumferential velocity values on the duct plane from 'surface parameter' tab on the left of Flow simulation tree.

And what I finally need to calculate is the swirl number, which is defiend as [average angular momentum] divided by [average axial momentum times radius of the duct] on the surface.

Because the average value of momentum is defined by surface integral of momentum flux at specified direction, I believe that if I export the axial and tangential velocity component as excel file and conduct surface integral manually on excel(by multiplying radius for each pixel) I could get the desired value.

But I am not sure if there would be a more easiler way to calculate surface integral without having to export calculated data from the solidworks.

Thanks for reading and thank you in adavance for your supportive help.

Sungkyun

After searching for the solution, I got to know that 'bulk average' value automatically given by solidworks would be a hint, yielding mass weighed average over the surface.

But still, as the angular momentum term contain radius r in the integral, which make the problem not easy.