[jmalbright]

Hello,
I am searching for a way to compute the gradient of axial velocity (or any other variable for that matter) in the radial direction in CFX Post v15. So far I have only been able to figure out how to compute gradients in the X, Y, or Z directions.

Any help with this would be appreciated.

[Opaque]

I assume you already created a User Defined variable, selected Method = Gradient, and use Velocity Axial to obtain the gradient of axial velocity, correct ?

Now you do the dot product of Radial Direction and Velocity Axial.Gradient. Create another User Defined variable, select Method = Expression and type

Radial Direction X * Velocity Axial.Gradient X + Radial Direction Y * Velocity Axial.Gradient Y + Radial Direction Z * Velocity Axial.Gradient Z

You should be set..

[jmalbright]

That is exactly what I needed and it worked perfectly. Thank you!