If you want to run a Wind Comfort simulation with Ingrid Cloud and don’t know how to choose the number of wind direction, here’s what you need to know.
"Wind Simulations with Ingrid Cloud are designed to give continuous inputs during the entire lifecycle of an architectural project."
The simple answer is: the later into the design process, the more directions a Wind Comfort analysis should have.
For validation stages, 16 to 36 directions is the industry standard recommendation. 4-direction projects are intended for early design stages, when comparing different proposals or to understand the general behaviour of wind.
Particularities of each project also have to be considered when choosing the resolution level of a simulation. If it’s known that the area of interest has the potential to create wind disturbances (for example, in a dense urban environment or a standalone structure in a low-height configuration) finer simulations are recommended, even in early stages.
Wind Simulations with Ingrid Cloud are designed to give continuous inputs during the entire lifecycle of an architectural project. With more than 300 media files available in each report and access to support from our CFD engineers, Wind Comfort simulations provide intelligible insights on how wind will impact an urban development.
To generate a Wind Comfort analysis, Ingrid Cloud combines Computational Fluid Dynamics Simulations with real-life weather data based on geolocation.
The weather data is provided by meteoblue.com, a Swiss science and technology company that offers local forecasts for more than 5 million places worldwide. For Wind Comfort Simulations, Ingrid Cloud considers wind speeds and direction from 3 years preceding the current year on an hourly basis for each day of the year.
And no matter the number of wind directions your Wind Comfort project has, the amount of weather data considered is the same. That is: 360 directions for the given location. This amount of data will be grouped into different sectors depending on the number of directions you choose for your simulation project.
A 4-direction simulation will group the weather data in 4 sectors: North, East, South and West.
An 8-direction simulation will group the weather data into 8 sectors: N, NE, E, SE, S, SW, W, NW.
A 16-direction simulation will group the weather data into 16 sectors: N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW, NNW.
A 36-direction simulation will group the weather data into 36 sectors (0-360 with ten degree intervals).
This will certainly depend on the properties of your project – the aerodynamics of the geometry, the magnitudes of wind in that specific location, and so on. With that said and to provide some reference, the next section demonstrates the same geometry and simulation setup performed with 4, 8 and 16 wind-directions.
Remember: the more wind directions considered, the more precise visualisation and analysis of wind behaviour you’ll get.