Fluid Dynamics Solver
Reynolds Number Calculator
Input velocity, scale length, density parameters, and fluid viscosity to determine flow regimes. Visualize boundary layer transition states in real time.
Input Parameters
Configure flight or flow characteristics below.
m/s
m
m
REYNOLDS NUMBER
1,679,000
Inertial / Viscous force FLOW REGIME
Turbulent
Turbulent flow dominant BL THICKNESS
14.8 mm
Estimated thickness δ Boundary Layer Growth Visualizer
Viscosity creates a laminar boundary layer transitioning to turbulence.
• Air density dynamically adjusts:
• Fluid viscosity (μ):
Fluid Physics Breakdown
The Reynolds number ($Re$) represents the ratio of inertial forces to viscous forces in a fluid:
Re = (ρ * V * c) / μ
- Laminar Flow ($Re < 100,000$): Viscous forces dominate. Fluid flows in smooth, parallel layers with minimal mixing. Aerodynamic drag is low but boundary layers are sensitive to separation.
- Transition Zone ($100,000 \leq Re < 500,000$): Boundary layer instabilities grow. Flow oscillates between laminar behavior and turbulent bursts.
- Turbulent Flow ($Re \geq 500,000$): Inertial forces dominate. Random fluctuations, mixing, and vortices occur. Increases skin friction drag but makes the boundary layer more resistant to separation.