Numerical Simulation of Atmospheric Boundary Layer Considering Wind Veering Based on Modified Shear-Stress Transport k-ω Turbulence Model

Abstract:

Based on the shear-stress transport （SST） k-ω model， a “modified SST k-ω model” was proposed by modifying the model parameters， the source terms， and the turbulent viscosity. A computational fluid dynamics （CFD） simulation of atmospheric boundary layer （ABL） considering wind veering was performed by using this modified model. The self-sustainable method was discussed in detail including the precursor simulations and the main simulations. The research shows that the simulation results of the modified SST k-ω model are consistent with field measurement values. The physical quantities can be self-sustained well by applying the wind profiles obtained from the precursor simulations as inflow conditions in the main simulations.

Key words:computational fluid dynamics;atmospheric boundary layer;self-sustaining;modified shear-stress transport k-ω model;coriolis force