SimScale’s Multi-Direction Pedestrian Wind Comfort Analysis tool is demonstrated in this free webinar. With the new professional feature, engineers, planners, and architects alike can simplify the process of calculating wind comfort. This tool will help to improve the accuracy of wind calculations, aggregate data, and evaluate the yearly average wind comfort anywhere at any location in the world. Take a look at the webinar recording on YouTube: https://www.youtube.com/watch?v=gNC9FxnJQOg&feature=youtu.be

1. By Jon Wilde and Richard Szöke-Schuller
CFD webinar
New Feature: Multi-Direction
Pedestrian Wind Comfort Analysis
Utilizing Pacefish®

2. ● Why is this important?
● How does the industry calculate this now?
● Why use CFD?
Today’s application
Multi-Direction
Pedestrian Wind
Comfort Analysis

3. What is a...
Lattice Boltzmann
simulation?
● Particle-based ‘mesh-less’ simulation
● Transient only
● Incompressible and isothermal
● Large-scale models 100s of millions of elements
● Runs purely on GPUs

4. Simulation setup
Multi-Direction Pedestrian Wind Comfort Analysis
How we set up these simulations in the SimScale Platform.

5. Define region
Define wind rose
Define pedestrian
zones
1
2
3
2 minute set up
It’s that simple.
1. Define region
2. Define wind rose
3. Define pedestrian zones
How simple can it be?

6. Step 1
● Position and size the cylindrical region of interest
● Define which direction is North
Define city region

7. Step 2
● Import wind rose or (soon) select global location and
use SimScale’s data
● Choose engineering standard
● Define wind exposures
Wind rose

8. Step 2
● Import wind rose or (soon) select global location and
use SimScale’s data
● Choose engineering standard
● Define wind exposures
Wind rose

9. Step 3
● Pedestrian region
● Roof terrace
● Terrain offset
Define pedestrian region

10. Results
Multi-Direction Pedestrian Wind Comfort Analysis
Findings, ROI, key learnings, and next steps
Utilizing Pacefish®

11. ● ABL Profile
● 8-36 directions
● Wind speedup factor
● Exposure correction factor
● Weibull distribution from the wind rose data
● Exceedance probabilities based on specific comfort
criteria
What’s going on behind the
scenes?
CFD
Source: https://www.sciencedirect.com/science/article/pii/S0360132316300415
Exposure
correction
Wind Speedup
(CFD / Wind Tunnel)

12. What’s going on behind the
scenes?
● ABL Profile
● 8-36 directions
● Wind speedup factor
● Exposure correction factor
● Weibull distribution from the wind rose data
● Exceedance probabilities based on specific comfort
criteria
CFD
Weibull Distribution
Source: https://wind-data.ch/tools/weibull.php?lng=en

13. Comfort criteria results
Results
Lawson Davenport NEN 8100

14. Transient results
Results
0 deg 90 deg 270 deg
Utilizing Pacefish®

15. 270 deg
Transient results
Results
0 deg
Utilizing Pacefish®

16. Design change
Multi-Direction Pedestrian Wind Comfort Analysis
Modifying the design and comparing results

17. What was changed in the design?
Design Change
Original Design Modified Design

18. Design Comparison - 67.5deg Wind Direction
Design Change
Utilizing Pacefish®
Original Design Modified Design

19. Live demonstration
Multi-Direction Pedestrian Wind Comfort Analysis

20. Results with a terrain
Results
Lawson
Utilizing Pacefish®

21. Results
● Run-times are typically a few hours
● Quick insights into wind comfort
● Ability to make design decisions and compare
results the same day
Key learnings
Utilizing Pacefish®

22. Multi-Direction Pedestrian Wind
Comfort Analysis
CFD webinar
Thank you!