Physics Calculators (Page 6)
Velocity, mechanics, energy, electricity and physics tools.
Stanton Number Calculator
Enter the Nusselt number Nu, Reynolds number Re and Prandtl number Pr to compute the Stanton number from St = Nu/(Re·Pr), a measure of convective heat transfer intensity.
Péclet Number Calculator
Enter velocity, characteristic length and thermal/mass diffusivity to compute the Péclet number Pe = v·L/D.
Sherwood Number Calculator
Enter mass-transfer coefficient, characteristic length and mass diffusivity to compute the Sherwood number Sh=k·L/D. k=1e-4, L=0.05, D=1e-9 → Sh=5000 (high mass transfer).
Fourier Number Calculator
Enter thermal diffusivity, time and characteristic length to compute the dimensionless Fourier number Fo = α·t/L².
Jakob Number Calculator
Enter specific heat, temperature difference and latent heat to compute the Jakob number Ja = c_p·ΔT/h_fg.
Ohnesorge Number Calculator
Enter viscosity, density, surface tension and length to compute the Ohnesorge number Oh = μ/√(ρ·σ·L).
Bond Number Calculator
Compute the Bond number Bo = ρgL²/σ (gravity vs surface tension).
Euler Number Calculator
Enter pressure drop, density and velocity to compute the Euler number Eu = Δp/(ρ·v²), a dimensionless fluid-dynamics ratio.
Damköhler Number Calculator
Compute the Damköhler number Da = k·τ (reaction vs residence time).
Knudsen Number Calculator
Compute the Knudsen number Kn = λ/L (mean free path / scale).
Snell's Law Calculator
Compute refraction or incidence angle from n₁, n₂ and one angle. n₁sinθ₁=n₂sinθ₂. Air→water: 30°→22°; total internal reflection when angle exceeds critical angle.
Escape Velocity Calculator
Enter a celestial body's mass and radius to compute its escape velocity v = √(2GM/r).