Two-dimensional numerical simulation of stably-stratified flows past a cosine-shaped hill

numerical simulation of downslope flows in a confined stratified region

geophysical fluids such as atmosphere and ocean often have stable density stratification; hence internal gravity waves are generated and propagated through them which are important in momentum and energy transfer in these media. these waves are also believed to generate layered structures in such media. recently there have been numerous theoretical, experimental and numerical studies on the way...

Temperature statistics in two-dimensional stably stratified turbulence.

Using two-dimensional direct numerical simulations, the statistics of temperature differences in stably stratified turbulence are studied. Comparison with passive scalar statistics in similar flows suggests that the stably stratified case is qualitatively similar to the passive case. Probability distribution functions of temperature differences between points separated by different distances co...

Large-eddy Simulation of the Stably Stratified

In this work, we study the characteristics of a stably stratified atmospheric boundary layer using large-eddy simulation (LES). In order to simulate the stable planetary boundary layer, we developed a modified version of the two-part subgrid-scale model of Sullivan et al. This improved version of the model is used to simulate a highly cooled yet fairly windy stable boundary layer with a surface...

A second-order immersed boundary method for the numerical simulation of two-dimensional incompressible viscous flows past obstacles

We present a new cut-cell method, based on the MAC scheme on cartesian grids, for the numerical simulation of two-dimensional incompressible flows past obstacles. The discretization of the nonlinear terms, written in conservative form, is formulated in the context of finite volume methods. While first order approximations are used in cut-cells the scheme is globally second-order accurate. The l...

A multilevel method applied to the numerical simulation of two-dimensional incompressible flows past obstacles at high Reynolds number