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.
The geometry is a rectangular block which was created based on the physical setup.
Fig.1. Physical setup and atmospheric boundary condition [2].
Analysis type and Domain
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
Simulation Setup
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
0.0Pa
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].
Results
The numerical simulation results of longitudinal velocity at different planes are compared with experimental results provided in study [1].
Fig.2. Comparison of numerical and experimental results of longitudinal velocity [1].Fig.3. Velocity streamlines imposed on pressure contours.
This offering is not approved or endorsed by OpenCFD Limited, producer and distributor of the OpenFOAM software and owner of the OPENFOAM® and OpenCFD® trade marks. OPENFOAM® is a registered trade mark of OpenCFD Limited, producer and distributor of the OpenFOAM software.
Last updated: January 8th, 2021
Did this article solve your issue?
How can we do better?
We appreciate and value your feedback.
Contents
Cookie Policy
SimScale uses cookies to improve your user experience. By using this website you consent to our cookie policy.
This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.
Strictly Necessary Cookies
Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings.
If you disable this cookie, we will not be able to save your preferences. This means that every time you visit this website you will need to enable or disable cookies again.
