A coupled modeling framework is used in this study to investigate the effect of subgrid-scale rainfall variability on the spatial structure of the evolving storm and on other surface variables and water and energy fluxes. The Fifth-Generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model coupled with the Biosphere–Atmosphere Transfer Scheme is combined w...

In large eddy simulation (LES), we generally use information of the grid width in representing a filter (Δ) to evaluate subgrid scale (SGS) model. practical applications, however, widths are largely different streamwise and cross-streamwise directions, resulting cells having high aspect ratios. such case, often adopt cube root grid-cell volume for width; i.e., Δ=(ΔxΔyΔz)1/3 Cartesian system. Al...

Interactions between water flow and patchy vegetation are governing the functioning of many ecosystems. Yet, numerical models that simulate those interactions explicitly at submeter patch scale to predict geomorphological ecological consequences landscape (order km2) still very computationally demanding. Here, we present a novel efficient convolution technique incorporate biogeomorphic feedback...

This paper investigates the feasibility of a high order finite difference weighted essentially nonoscillatory(WENO) scheme for large eddy simulations(LES) with implicit subgrid scale model. In this paper, the 5th-order WENO scheme with a conservative 4th-order central differencing for viscous terms are used to simulate the flow past a circular cylinder at ReD = 3900. The turbulent effects near ...

In this paper we report on the outline of a large eddy simulation subgrid model for liquid/gas phase interface dynamics. A key feature of the proposed model is to take the subgrid phase interface dynamics fully into account by employing a dual-scale approach. Instead of modeling the LES subgrid phase interface geometry, we fully resolve it on an auxillary grid using the refined level set grid a...