WindSim — CFD Laboratory

▸ Geometry Sphere

Sphere

r = 0.6, ~2500 faces

Cube

1.0 × 1.0 × 1.0

Cylinder

r = 0.4, h = 1.2

NACA 0012

chord = 2.0, span = 1.0

Ahmed Body

simplified bluff body

+ Import Custom Mesh

.glb / .stl — drag or click

▸ Boundary Conditions

Inlet Velocity 0.080 lu/ts

Velocity in lattice units per timestep. Keep below 0.15 for stability.

Inlet Direction

▸ Solver Settings

Grid Resolution

Relaxation Time (τ) 0.600

Controls viscosity. Lower = less viscous, faster flow. τ > 0.5 required for stability.

Steps per Frame 4

More steps = faster convergence but heavier GPU load.

▸ Visualization

Color Map

Field Variable

Domain: 6.0 × 6.0 × 6.0 m
Object: Sphere (r=0.6)
Grid: 64 × 64 × 64

Force Coefficients

Drag Cd

0.0000

Lift Cl

0.0000

Side Cs

0.0000

Max |u|

0.0000lu/ts

Convergence

Mass Error

0.0000%

Status

Idle

Solver Info

Method: LBM D3Q19
Collision: BGK (SRT)
Boundary: Bounce-Back
Inlet: Zou-He Velocity
Outlet: Extrapolation
Turbulence: Smagorinsky SGS

About

WindSim CFD Lab runs a Lattice Boltzmann solver entirely on your GPU via WebGPU compute shaders. No cloud, no paywall, no installation.
Inspired by SimScale.