Hey @a_v_nair,
I’ve taken a look at it and have 2 pointers:
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There’s no result controls for yplus. By visual inspection your first layer thickness is around 1,7e-4 m thick, which should result in y+ between 5-10 on the airfoil. This is quite bad because this is not consistent with neither wall functions or full resolution treatment.
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Recently, under numerics, the default relaxation method was changed from manual to automatic. It might be worth giving it a shot with a manual relaxation aswell (default values should work fine!).
Let us know if you’re able to progress!