13 The South China Sea is a marginal basin with a complex circulation influenced by the 14 East Asian Monsoon, river discharge and intricate bathymetry. As a result, both the mesoscale 15 eddy field and the near-inertial energy distribution display large spatial variability and they 16 strongly influence the oceanic transport and mixing. 17 With an ensemble of numerical integrations using a reg...

Phenomena associated with the turbulent flow of molten steel in a continuous casting mold are responsible for many defects in the final product, including surface slivers, frozen meniscus hooks, captured inclusions that enter the mold from upstream, and mold slag entrapment. Animations of some of these transient flow phenomena are presented from Large-Eddy Simulations of a typical slab caster w...

The transport equation of entropy is introduced in large eddy simulation to perform exergy analysis of turbulent combustion systems. The sources of exergy destruction can be evaluated by analyzing entropy generation terms, which appear in unclosed forms in this equation. The closure is based on the filtered density function (FDF) methodology. The primary advantage of FDF is that chemical reacti...

Our current main focus is building upon earlier work that produced quantitatively accurate hydrodynamics and producing a tool for sediment transport modeling. Our tool is a large-eddy simulation [LES] in three dimensions and time, at scales on the order of meters, and in the presence of waves and a current. Our numerical analysis objectives include accurate representation of the flow near rough...

This paper presents a new dynamic one equation eddy viscosity model for LES of compressible flows. Based on the compressible version of dynamic Smagorinsky model (DSM), the transport equation for sub-grid scale (SGS) kinetic energy (KE) is introduced to predict SGS KE, instead of the commonly used Yoshizawa’s model. The SGS KE transport equation for compressible flow is derived, and the unclose...

By using satellite altimeter observations and the eddy-permitting Estimating Circulation Climate of Ocean, Phase II (ECCO2), seasonal variation eddy kinetic energy (EKE) along East Australian Current (EAC) is investigated. Both ECCO2 outputs indicate active intra-seasonal EKE EAC path. The result reveals that mainly concentrated in upper 500 m layer, shows a prominent cycle, strong austral summ...

This study provides an interpretation of isopycnal eddy transport for mass and passive tracers in double-gyre eddy-resolving oceanic circulation. paper focuses on a transport/diffusion tensor representation the tracer flux, companion will focus advective eddy-induced transports. We use spatial filter to separate large small scales, which leads results distinct from those obtained via temporal R...

Comprehensive analysis of the largest first-principles simulations to date shows that stochastic wave-particle decorrelation is the dominant mechanism responsible for electron heat transport driven by electron temperature gradient turbulence with extended radial streamers. The transport is proportional to the local fluctuation intensity, and phase-space island overlap leads to a diffusive proce...

Wave-induced boundary layer (BL) flows over sandy rippled bottoms are studied using a numerical model that applies a one-way coupling of a “far-field” inviscid flow model to a “near-field” large eddy simulation (LES) Navier– Stokes (NS) model. The incident inviscid velocity and pressure fields force the LES, in which near-field, wave-induced, turbulent bottom BL flows are simulated. A sediment ...

The possibility that the oceanic general circulation is undergoing changes as part, or the cause, of major climate shifts is being intensely discussed, with some published results relying on data from moorings spanning the North Atlantic Ocean. The circulation is, however, extremely noisy. Here, I use existing estimates of the frequency and wavenumber content of geostrophic eddies in the ocean ...