Idealized atmospheric boundary layer simulations for Wang et al. (2021) WENO-scheme study

This dataset contains the numerical simulations used in the Wang et al. (2021) study of WENO schemes in an idealized atmospheric boundary layer. That work explores the influence of Weighted Essentially Non-Oscillatory (WENO) schemes on Cloud Model 1 (CM1) large-eddy simulation (LES) of a quasi-steady, horizontally homogeneous, fully developed atmospheric boundary layer (ABL). An advantage of applying WENO schemes to scalar advection is the elimination of acoustic-wave propagation generated by solving the compressible fluid equations and the associated oscillations of domain-total vertical velocity. Applying WENO schemes to momentum advection in addition to scalar advection does not yield further advantage, but an adverse effect on resolved turbulence within LES. As a tool designed to reduce numerically generated spurious oscillations, WENO schemes also suppress physically realistic instability development in turbulence-resolving simulations. Thus, applying WENO schemes to momentum advection reduces vortex stretching, suppresses energy cascade, reduces shear-production of resolved Reynolds stress, and eventually amplifies the deviation between LES results of surface-layer turbulence and the filtered law of the wall (LOTW). The role of WENO schemes in compromising surface-layer turbulence has inspired a concept of anti-WENO (AWENO) schemes to amplify instability development in regions where energy-containing turbulent motions are inadequately resolved by LES grids. The success in reproducing the filtered LOTW by applying AWENO schemes to momentum advection suggests an attractive route toward reproducing near-surface turbulence and solving other "Terra Incognita" problems.