Average Wind Velocity
The average Wind Speed field represents a weighted average of the local wind speed Ulocal for a given period (annually, seasonally, or monthly). This field is derived from wind simulations and wind statistics for the area, providing a comprehensive understanding of wind behavior across different parts of the computational domain.
How is it computed?
- Wind Directions:
- What we call a simulation gathers the results of 16 subsimulations, one for each wind direction. We simulate 16 wind directions to get a 360 understanding of the wind conditions at your site. These directions are evenly distributed across 360 degrees.
- Wind Frequencies:
- Wind frequencies indicate how often the wind blows from each direction and at which speed it blows. We gather data points in speed classes 0.0 - 4.0, 4.0 - 6.0, 6.0 - 8.0, 8.0 - 10.0, 10.0+
- These frequencies are crucial for weighting the local wind speeds appropriately.
- Weighted Local Wind Speed Calculation:
- The local wind speed is weighted and scaled by the frequency of the wind direction and a scaling factor based on wind speed classes.
- Aggregation of Average Wind Speed:
The weighted local wind speeds are accumulated and averaged across all directions to form the average wind speed field.
Importance of the Average Wind Speed
The field provides valuable insights into the wind environment over a specified period (annually, seasonally, or monthly). You can get a quantitative understanding of the wind speed you will deal with on your site during the period of interest. This field is beneficial for:
- Urban Planning: Helps in designing buildings and urban areas considering prevailing wind conditions.
- Safety Assessments: Identifies high wind speed areas that may pose risks to people and structures.
- Environmental Studies: Aids in understanding wind interaction with natural and built features.
