i am trying to develop a Parabolic Velocity Profile in 3D tube/channel flow. for the 2D case i use
u = 1.5*Um *(1-(2y/H)^2)
where
Um= fluid velocity
y = position of solid on "y" axis (x,y)
H = width of channel
The above equation is not possible to used for 3D case (x,y,z). i try to...