Analysis type and Domain
The snappyHexMesh tool was used to generate a uniform mesh (see Fig.2. and Table 2.).
A typical property of the generated mesh is the y+
${y}^{+}$
(“yplus”) value, which is defined as the nondimensionalized distance to the wall; it is given by y+=u∗y/ν
${y}^{+}={u}^{\ast}y/\nu $
. A y+
${y}^{+}$
value of 1 would correspond to the upper limit of the laminar sublayer.
 Explicit resolution of the nearwall region: The first cell lies at most at the boundary of the laminar sublayer and no further. Here, y+
${y}^{+}$
value is 1 or below.
 Use of wallfunctions to resolve the nearwall region: There is no need to place cells very close to the laminar sublayer, and typically 30⩽y+⩽300
$30\u2a7d{y}^{+}\u2a7d300$
.
A y+
${y}^{+}$
value of 30 was used for the inflation layer. The k−ω
$k\omega $
SST turbulence model was chosen, with wall functions for nearwall treatment of the flow.
Tool Type : OPENFOAM®
Analysis Type : buoyantSimpleFoam
Mesh and Element types :
Table 2: Mesh Metrics¶
Mesh type 
Number of volumes 
Type 
snappyHexMesh 
5.95×106
$5.95\times {10}^{6}$

3D hex 