Numerical Modelling of Beach Sand Transport Phenomena by Wind Flow

Abstract

This work shows a way f or simulating the natural process of moving sand of beach due the acuon of the wind. Two aspecrs muse be considered about this natural íluidparticle system: the wind field adjusonent and the transpon and the deposition of the sand which will be represented in terms of particles concentraúon. firstly, we estimate a thre.e dimensional wind field from experimental data adjusting \Vlth fuute element technique, a simple interpolated one such Lhat final field oblained is mcompress1ble, imposing a boundary condition of impenetrability over the ground. On Lhe other hand, Lhe distribulion of sand concentraúon is approached solving a class1cal convection-diffusion equation. In this case, the terminal velocity of the panicles due to gravity must be introduced into the model.