[omidiut]

Hi all

As know there is 6 predefined variable in mesh deformation simulation in CFX; Total Mesh Displacement X,Y,Z and Mesh Displacement X,Y,Z
Also there is a relation between cylindrical and Cartesian coordinate as:
theta = Arctan y/x
if you use this :
Total mesh displacement theta = Arc tan (Total mesh dispalcement y/Total mesh dispalcement x)

the errors occurs in first time steps when Total mesh dispalcement=0
So how can define Total mesh displacement Theta?

Best regards.

[ghorrocks]

Use atan2 instead.