## 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+

${y}^{+}$ (“*y-plus*”) value, which is defined as the non-dimensionalized 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 sub-layer.

*Explicit resolution of the near-wall region*: The first cell lies at most at the boundary of the laminar sub-layer and no further. Here, y+

${y}^{+}$value is 1 or below.

*Use of wall-functions to resolve the near-wall region*: There is no need to place cells very close to the laminar sub-layer, 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 near-wall 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 |