[ziggo]

I'm running a 3D simulation in Fluid and have found that when I change the inflow velocity direction my results are terrible.
I have a three dimensional wedge in a spherical domain. From the side it looks as in image 1. Image 1 also shows the how the domain is meshed.
This situation gives me acceptable lift and drag results w.r.t. the wind tunnel data I have.

Image 1:


When I change the inflow velocity direction the error from the CFD simulation grows w.r.t. the windtunnel data.

If I change the inflow direction for example to the direction shown in image 2 the difference between the CFD and the data is around 20%.

Image 2:



If I change the direction even more, the error becomes larger.

I define the velocity on the velocity-inlet using xyz-components. For the first image this is

x = 0, y = 0, z = -26

and for the second image this is

x = 0, y = =8.9, z = -24.4

I also make sure that Fluent calculates the CL and CD values with the correct direction vectors. So for the first image the CL components are:
[CODE]
x = 0, y = 1, z = 0
[\CODE]
And for the second image the CL components are:
[CODE]
x = 0, y = 0.94, z = -0.34
[\CODE]

How can I make sure that for every velocity direction I get reasonable results as in the situation shown in image 1? Do I need to rotate the geometry instead, re-mesh and keep the velocity parallel to the z-axis?