Velocity Amplification Factors (VAF) - [source code]
Compute Velocity Amplification Factors (VAF) and annual wind speed at probes from CFD results and EPW weather data. VAF (the term used in the wind-engineering literature for what Eddy3D historically called "wind factors") is the local wind speed normalized by the reference speed.
Input
| Name | Nickname | Description | Type |
|---|---|---|---|
| Boundary Conditions | BC | OutdoorBoundaryConditions object from the ABL or Uniform Flow component. | Generic Data |
| Wind Velocity | U | DataTree of velocity vectors {direction}[probe] from the probe results. | Vector |
| EPW | Path to the EPW weather file. | Text | |
| Probe Height | Height | Probing/pedestrian height in meters. | Number |
| Interpolate | Interp | Interpolate between bracketing wind directions. | Boolean |
| Points | P | Optional probe points in the same order as the Wind Velocity tree's branches. Embedded into the Wind Speed output so downstream components — the Pedestrian Wind Comfort mesh — know where each series lives without extra wiring. | Point |
Output
| Name | Nickname | Description | Type |
|---|---|---|---|
| Wind Speed | Wind | Annual wind field object (every point's 8760-hour wind-speed series) for the Pedestrian Wind Comfort component. A single object rather than a data tree, so a few thousand probes stay fast. | Generic Data |
| Velocity Amplification Factors | VAF | DataTree {direction}[probe] of Velocity Amplification Factors (VAF) — local wind speed normalized by the reference (undisturbed) speed. | Number |