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ABL Flow

ABL Flow

Atmospheric Boundary Layer (ABL) Inlet

Sets up a logarithmic wind profile based on aerodynamic roughness length (z0). Essential for accurate urban wind flow simulation, representing the friction of the upwind terrain.

Eddy3D 0.5.0.815

Input

  • Dir
    Wind directions to simulate. Units: degrees (0-359). 0° = North, 90° = East. Use multiple for annual studies.
  • Uref
    Wind speed at reference height. Units: m/s. Typical urban: 3-8 m/s. Default: 5 m/s
  • Zref
    Height where velocity is measured (weather station height). Units: m. Standard: 10m. Default: 10m
  • Z0
    Aerodynamic roughness length. Units: m. Examples: 0.01 (open terrain), 0.3 (suburban), 1.0 (urban). Default: 1m
  • Zgnd
    Minimum z-coordinate of terrain. Units: m. Usually 0 for flat terrain. Default: 0m
  • EPW
    Optional: Path to EnergyPlus weather file (.epw) for climate-based wind data.

Output

  • BC
    Wind inlet boundary condition for Domain component