Implicit large-eddy simulation of the stratocumulus-topped boundary layer: a grid sensitivity study etc15 Tracking Number 278Presentation: Session: Atmospheric turbulence 2 Room: Room C Session start: 15:00 Tue 25 Aug 2015 Jesper G. Pedersen jesper@igf.fuw.edu.pl Affifliation: University of Warsaw Szymon P. Malinowski malina@igf.fuw.edu.pl Affifliation: University of Warsaw Marta K. Kopeć mtrzask@igf.fuw.edu.pl Affifliation: University of Warsaw Topics: - Atmospheric turbulence, - Large eddy simulation and related techniques Abstract: A range of implicit large-eddy simulations of the stratocumulus-topped boundary layer is performed to study the influence of grid resolution on selected parameters including liquid water path and second and third moments of vertical velocity fluctuations. The simulations are based on two sets of aircraft measurements, which are also used to evaluate the results of the simulations. The specific case presented here indicates that simulations with a grid aspect ratio accounting for the anisotropic nature of the turbulence near the surface and at the top of the boundary layer lead to better agreement with measurements than simulations with an isotropic grid. |