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Wind Flow Around Three Building CFD Simulation

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The problem simulates the wind flow through three tall buildings arranged in a triangular shape.

This ANSYS Fluent project includes CFD simulation files and a training movie.

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To order your ANSYS Fluent project (CFD simulation and training), contact our experts via [email protected], online support, or WhatsApp.

Description

Project Description

The problem simulates the air flow through three buildings which are arranged in a triangular shape. In fact, these buildings are considered as barriers. In the present case, the area around the three buildings is considered, where the wind enters it horizontally at a velocity of 5 m.s-1 and collides with the buildings. The purpose of this project is to investigate the behavior of wind flow around buildings after dealing with them and to study the behavior of air in the space between the buildings.

Building Geometry & Mesh

The present 3-D modeling is carried out using the Design Modeler software. The present model consists of a very large cube-shaped area for free wind flow and three tall buildings with lots of details, which are placed inside this area with a triangular arrangement. The figures below show a view of the geometry.

wind flow

The meshing of the model has been done using ANSYS Meshing software and the mesh type is unstructured. The element number is 6392910 and the cells adjacent to the structures are much smaller and more accurate. The figures below show a view of the mesh.

wind flow

Wind Flow CFD Simulation

To simulate the present model, several assumptions are considered:

  • Pressure-based simulation has been performed.
  • The present model is steady-state.
  • The gravity effect on the fluid is equal to -9.81 m.s-2 along the y-axis.

A summary of the steps for defining a problem and defining its solution is given in the following table:

(wind flow) Models
Viscous model k-epsilon
k-epsilon model standard
near-wall treatment standard wall function
(wind flow) Boundary conditions
Inlet Velocity inlet
velocity magnitude 5 m.s-1
Outlet Pressure outlet
gauge pressure 0 Pascal
buildings’ walls Wall
Wall motion stationary wall
(wind flow) Solution Methods
Pressure-velocity coupling   SIMPLE
Spatial discretization pressure second-order
momentum first-order upwind
turbulent kinetic energy first-order upwind
turbulent dissipation rate first-order upwind
(wind flow) Initialization
Initialization method   Hybrid

Results

After the solution process is complete, we obtain contours of velocity and pressure, and also velocity vectors and two-dimensional pathlines.

All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.

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