Atmospheric Boundary Layer - [source code]
Define atmospheric boundary layer inflow conditions for Eddy3D.
Input
| Name | Nickname | Description |
|---|---|---|
| Dirs | Wind directions as meteorological degrees (wind-from, clockwise from north) or flow vectors. One solver case is created per direction. Optional; default is flow toward +X. | |
| Wind Speed | U | Wind speed at the reference height (m/s), one value per wind direction. A single value applies to all directions; a shorter list repeats its last value. Optional; default is 5. |
| Zref | Reference height for wind speed (m). Optional; default is 10. | |
| z0 | Aerodynamic roughness length (m). Higher values indicate rougher terrain. Optional; default is 1. | |
| Zgnd | Ground/displacement height for the ABL log-law profile (m). Optional; default is 0. | |
| k | Inlet/initial turbulent kinetic energy k (m^2/s^2) for the ABL. Used by the k field and the turbulence transports; the inlet patch still uses the atmBoundaryLayer k profile. Optional; default is 0.015. | |
| epsilon | Inlet/initial turbulent dissipation rate epsilon (m^2/s^3) for the k-epsilon family. The inlet patch still uses the atmBoundaryLayer epsilon profile. Optional; default is 0.135. | |
| omega | Inlet/initial specific dissipation rate omega (1/s) for the k-omega SST model. Optional; default is 100. |
Output
| Name | Nickname | Description |
|---|---|---|
| Boundary Conditions | BC | Atmospheric boundary layer inflow boundary conditions (including the wind directions); plug into the wind case BC input. |
| Vectors | Resolved unit flow vectors, one per wind direction. |