Andrew Nichols, Simon J. Tait, Kirill V. Horoshenkov, Simon J. Shepherd, A model of the free surface dynamics of shallow turbulent flows


Here a model is presented to demonstrate that free surface oscillatory spatial correlation patterns result from individual surface features oscillating vertically as they advect over space and time. Comparison with laboratory observations shows that these oscillating surface features can be unambiguously explained by simple harmonic motion,whereby the oscillation frequency is controlled by the root-mean-square water surface fluctuation,and to a lesser extent the surface tension.