Pedestrian Wind Comfort

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Optimizing high-rise building based on CFD wind analysis

To simulate the airspeed between buildings

This Geometry is distributed under:
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Geometry Originated from AccuCities:
https://www.accucities.com/new-free-city-model-samples-cardiff-bristol-dublin/

The geometry was modified for simulation purposes which may or may not have introduced inaccuracies. Fundamentally the modification was extending the topology and modification to topology. Additionally some surfaces had gaps, these were closed by moving some faces. 
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This project aims to demonstrate the use of porous media, using known pressure loss curves to model an object (balcony railings in this case) as porous media, showing a comparison between modelled pressure loss in the Lattice Boltzmann Method, and demonstrating its application in Pedestrian Wind Comfort Analysis.

This project aims at investigating the impact of trees as porous media in mitigating the wind effects affecting pedestrian wind  comfort.
A comparison between two scenarios is undertaken, one using an urban model with no trees and one using trees. The areas of significant improvement in wind comfort and reduction in wind velocity are highlighted.

Accurate wind pressure coefficients in thermal modelling software (building performance modelling) are critical to evaluating several key design outputs on buildings. The greatest impact of inaccurate wind pressure coefficients will be on the calculation of airflow through openings and thus ventilation, fresh air rates, cooling and overheating assessments can all be adversely affected. Most standard energy/thermal software has an oversimplified treatment of wind pressure which is also poorly understood and applied by software users. 

SimScale can quickly and accurately calculate transient wind flows and pressures around buildings and on building facades. These can be used as in input into energy/thermal software for more accurate building performance modelling.

For this project, we simulated two different scenarios, one using a model without the integration of trees around the park and near the building, and the second including the effect of these trees. The purpose of this was to find out if planting trees around urban high-rise buildings can be an effective strategy to mitigate the undesirable effects of airflow, leading to wind discomfort at the pedestrian level.

Example of how  Pedestrian Wind Comfort CFD analysis can be used within an architects design process.

Pedestrian wind comfort simulation of the La Defense district in Paris, France.

wind comfort study for London area of walkie talkie building

Used to demonstrate : 
- STL with layers workflow
- Detailed geometry handling (stadium)
- Additional results export:  3D volume data and surface pressures
- Simplified trees modeling (forest)
- Difference between 4 and 8 wind directions

Determine wind comfort and Analyze wind Pressure

Example of porous media used to model trees in a city park area, comparing between with and without trees.

The objective of this simulation is to demonstrate how to prepare a geometry with extreme terrain (mountainous area) and then simulate it in the PWC analysis type.

This project aims at assessing the pedestrian safety, comfort, and environmental impact of residential zones located in the district of Stockholm Royal Seaport.

Pedestrian Wind Comfort AIJ Case F Benchmark - PerTests

Pedestrian Wind Comfort | SimScale Project Library | Page 4