Average Wind Velocity

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?

  1. 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.
  2. 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.
  3. 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.
  4. Aggregation of Average Wind Speed:
    • The weighted local wind speeds are accumulated and averaged across all directions to form the average wind speed field.

      Average Wind Speed in 3D viewer*

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. Average Wind Speed - use case