Pedestrian Wind Comfort

Find projects using the PWC analysis type here. | Page 4

This project takes a standard grasshopper model used to demonstrate outdoor thermal comfort, to demonstrate how to import SimScale Results back into the grasshopper engine for visualization and calculation purposes such as calculating UTCI.

Wind comfort study for London area of walkie talkie building

This project aims at evaluating how much air from the exhaust of a building AHU reaches the balconies and windows of its facade, as well as the other surrounding buildings.  Multiple wind direction scenarios are evaluated.
The CAD model includes a detailed, central building with balconies and windows, from where the exhaust air is released. The surrounding building are modeled as simple blocks.
This project uses incompressible analyses with passive scalars. The use of passive scalar is to model the concentration of air exhaust at any location.

Optimizing high-rise building based on CFD wind analysis

To simulate the airspeed between buildings

This Geometry is distributed under:
Creative Commons Attribution-ShareAlike (CC BY SA) license

License is linked here:
https://creativecommons.org/licenses/by/4.0/

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. 
The main points are:
You are free to
Share- copy and redistribute the material in any medium or format
Adapt- remix, transform, and build upon the material for any purpose, even commercially.

Under the following terms:

Attribution- You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
ShareAlike- If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
No additional restrictions- You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

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

Pedestrian Wind Comfort | SimScale Project Library | Page 4