I will bring it up at my next meeting. 

I assume that it converged. I ran it for 2000 iterations and monitored the lift and drag coefficients which both found steady values. However, the lift coefficient starts oscillating in the end. Due to the peculiar shape of the wing, the lift and drag is naturally quite low and therefore also the change in their coefficients in an absolute sense. After 2000 iterations the iterative error in the lift coefficient is less than 0.1%, the continuity and k residuals dropped by 3 orders of magnitude, the residuals for the velocity components and omega dropped by 6 orders of magnitude and the energy residual by 8 orders. For a structured mesh these residuals aren't really low which probably means that I should improve my mesh. However, it would surprise me if this is the cause for the strange behaviour at the wall.