This project analyses the steady-state flow around an isolated building. The aim is to validate the flow around the building against experiments carried out at the Japan Wind Institute [1]. An atmospheric boundary layer profile is implemented at the inflow.
The numerical simulation results of SimScale were compared with the experimental results.
Import validation project into workspace
The geometry is a rectangular block which was created based on the physical setup.
The “Hex-dominant parametric (only CFD)” tool was used to mesh the domain. Different mesh refinements were applied to get a good quality mesh.
Tool Type : OPENFOAM®
Analysis Type : Incompressible Steady-state (Turbulent)
Mesh and Element types :
| Mesh type | Number of volumes | Type |
|---|---|---|
| Hex-dominant parametric | 1.411×107
|
3D hex |
Fluid:
Air with kinematic viscosity of 1.5×10−5kg/ms
is assigned as the domain fluid. The boundary conditions for the simulation are shown in Table 2.
Boundary Conditions:
| Parameter | Top, Left and right | Inlet | Outlet | Building and bottom walls |
|---|---|---|---|---|
| Velocity | Slip wall | From File | Zero Gradient | No-Slip wall |
| Pressure | Slip wall | Zero Gradient | 0.0 Pa
|
Zero Gradient |
| k
|
Slip wall | Same as Initial value | Zero Gradient | Wall Functions |
| omega | Slip wall | Same as Initial value | Zero Gradient | Wall Functions |
The velocity at inlet is assigned through the file-upload option provided on the platform. The file corresponds to the velocity profile provided by experiments [1].
The numerical simulation results of longitudinal velocity at different planes are compared with experimental results provided in study [1].
| [1] | (1, 2, 3, 4) http://www.aij.or.jp/jpn/publish/cfdguide/index_e.htm |
| [2] | Cooperative project for CFD prediction of pedestrian wind environment in then Architectural Institute of Japan |
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