Mesh independence analysis for grid convergence at Reynolds number Re ≅ 2·105: Parameters from the snappyHex-MeshDict dictionaries of the different meshes studied; drag coefficient and percentage difference on the prediction of the drag coefficient with respect to Mesh 1 results as functions of average y+. DC stands for drag counts, to where 1 drag count is equal to a Cd of 0.0001.

Table 1: Mesh independence analysis for grid convergence at Reynolds number Re ≅ 2•10⁵: Parameters from the snappyHex-MeshDict dictionaries of the different meshes studied; drag coefficient and percentage difference on the prediction of the drag coefficient with respect to Mesh 1 results as functions of average y⁺. DC stands for drag counts, to where 1 drag count is equal to a Cd of 0.0001.

	Refinement Surfaces	Layers	Expansion Ratio	Final Layer Thickness
Mesh 1	Level (3 4)	nLayers 10	1:15	0.3
Mesh 2	Level (3 4)	nLayers 15	1:15	0.3
Mesh 3	Level (4 5)	nLayers 20	1:15	0.3
Mesh 4	Mesh 3 + refineWallLayer ('airfoil')		0:435
	y_avg⁺	C_d(DC)	$\frac{C_{d} - C_{d 1}}{C_{d}} \times 100$
Mesh 1	1.02	132.60	0.0
Mesh 2	0.577	136.67	3.0
Mesh 3	0.152	139.45	4.9
Mesh 4	0.0649	139.51	4.9