🌊 Two-Layer Internal Wave: Thermocline Dispersion and Velocity Profile (2D)

Side view of a warm layer floating on a cold layer, with a wave travelling along the thermocline while the surface stays still. Set layer thickness, depth, density jump, amplitude and wavelength, and see phase and group speed, period, long-wave speed and the layer currents. The closed-form dispersion relation is checked against a finite-difference eigenvalue solution, with four in-page numerical checks.