Calculation of tangential velocity
 

Hi!


I am simulating swirling flow in a pipe with y-axis coinciding the axis of the pipe. Now I wish to calculate tangential velocity and radial velocity. Probably that could be done by using custom field function. What equations shall I use to calculate the above two velocity components?




Thanks and Regards

I would appreciate if any reference related to this is shared.

It's high school trigonometry with a bunch of sines and cosines, no need to post references. I wrote cylindrical coordinates on google and those are the two first results
i get
https://mathworld.wolfram.com/Cylind...ordinates.html
https://tutorial.math.lamar.edu/clas...calCoords.aspx

Look for more and read. Again, this is simple maths, you can also derive the formulas on your own without any reading, just paper and pen

I wish if I would have performed few simulations during my high-school time itself.

I did not run CFD in high school.
What I am saying is that to calculate a tangential velocity you need the velocity magnitude and a bit of trigonometry. Really, draw a circle (which is a section of your pipe) and draw a tangential velocity vector, which means the component of velocity perpendicular to the radius and lying on the section of the pipe.