🏙️ Atmospheric Boundary Layer Wind Profile
Calculate atmospheric boundary layer wind velocity gradient using Log-Law and Power-Law, dynamic wind stagnation pressure on facades, and base overturning moments.
⚡ Fortran 90 Engine
Double Precision (IEEE 754)
✓ ISO / ASME Validated
📊 Solver Telemetry
● ACTIVE
👁️ Consultations
15
⚡ Calculs faits
13
💾 Téléchargements
413
📦 Code Fortran
4.4 KB
📅 Mise en service
Jun 2026
⏱️ Latence
< 1 ms
🏙️ Atmospheric Boundary Layer & Vertical Wind Velocity Gradient
Real-time visual simulation of ground roughness shear, logarithmic velocity profile & high-rise structural drag📝 Configuration & Presets
ABL Wind Engineering Formulations:
• Log-Law Profile: U(z) = (u*/κ) · ln(z / z₀) [m/s]
• Friction Velocity: u* = (κ · Uref) / ln(zref / z₀)
• Dynamic Stagnation Pressure: q(z) = ½ ρ [U(z)]² [Pa]
• Turbulence Intensity: Iz(z) ≈ 1 / ln(z / z₀)
• Log-Law Profile: U(z) = (u*/κ) · ln(z / z₀) [m/s]
• Friction Velocity: u* = (κ · Uref) / ln(zref / z₀)
• Dynamic Stagnation Pressure: q(z) = ½ ρ [U(z)]² [Pa]
• Turbulence Intensity: Iz(z) ≈ 1 / ln(z / z₀)
📊 Wind Engineering Results
Configure inputs and click Compute to view results.
📘 Calculation Methodology & ASCE 7 / Eurocode 1 Standards
Atmospheric Logarithmic Law
Derived from Prandtl mixing length theory for neutral atmospheric boundary layer equilibrium over rough terrain:
U(z) = (u* / κ) · ln(z / z₀)
Dynamic Wind Pressure & Overturning
Dynamic wind stagnation pressure scales quadratically with height: $q(z) = \frac{1}{2} \rho [U(z)]^2$, creating substantial overturning moments on high-rise structures.
Key Engineering Assumptions
- Neutral atmospheric thermal stability (no strong convective inversions).
- Homogeneous fetch and uniform aerodynamic terrain roughness $z_0$.
- von Kármán constant $\kappa = 0.40$.