You are using first order turbulence numerics and upwind advection. You are never going to get very accurate results with those settings. The advection should be hydrid (with blend factor of close to 1.0) or high res. You should also consider high order turbulence numerics.

Ah okay thanks I have changed advection scheme to hybrid with a blend factor of 1.0 and set the turbulence model to higher order.

Boundary conditions seem to be correct.

Here are the pictures

Front Side mesh grid Attachment 43954
Back Side mesh grid Attachment 43955
Mesh setting Attachment 43956
BC Attachment 43957

Its running right now, even on a 8 core 16 thread with 100% utilization a run still takes 20 mins, will check back with results. Any other tips?

Thank you so far.

Here's a tip:

CFX does not run effectively on virtual cores. If you have 8 physical cores then do not run more than 8 processes.

Nice so now I am getting nice results but for some reason the reynolds number I am getting is less than what the max reynolds number is. My graph ends at 6x10e6 where I should be getting max re as 2.5x10e7.

How are you calculating Re?

RE=(Density*Velocity*X)/(Dynamic Viscosity)

Yes, I already guessed that......

But what density? How did you define it? And how did you calculate it? Same for Velocity and dyn viscosity.

I set the velocity which I calculated using the solver. The density is the density of air which I defined in cfx pre. I got dynamic viscosity from the solver.

How did you define the velocity? How did you calculate it?

Is the fluid incompressible and constant properties?

Its non compressible, constant properties, stready state

OK, so density and dyn viscosity are easy to define. Now we just need to find how you defined the velocity. You say "I set the velocity which I calculated using the solver", so which velocity? An average? Freestream? At a certain point?

I fixed it, I used the velocity at the freestream using the probe function. I am getting the correct Reynolds number at the end of the plate at x=5.09016m :D