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Wind Tunnel

Simulation

Grid resolution 300 × 150 Domain length (L : H) 2.0 : 1 Inlet velocity 0.100 Angle of attack 0.0° Viscosity τ 0.550

τ → 0.502 reaches Re ~ 10⁴ (keep the LES model on); raise the resolution for a sharper vortex street.

Steps / frame 4 Tunnel walls Turbulence model (Smagorinsky LES) Regularized collision (stability) Inlet flow profile

Visualization

Schlieren = |∇ρ| (wave fronts & shear layers); dilatation = ∇·u (acoustic radiation).

Colormap Flow overlay Fixed scale

Obstacles

Drag on the canvas to paint or erase walls.

Click a preset, then click in the tunnel to place it (a ghost outline follows the cursor; Esc cancels).

Cylinder spin 0.000

Surface speed of newly placed cylinders (+ is counter-clockwise). Each placed cylinder gets its own slider below.

Microphones

Pressure probes: place up to 4 in the tunnel; their spectra (FFT of p′) appear bottom-left with the Strouhal number of the dominant peak. Esc cancels placement.