Three-Dimensional Turbulence Characteristics of the Bottom Boundary Layer of the Coastal Ocean

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...

mixed convection is a fundamentally significant heat transfer mechanism that occurs in selection industrial and technological applications. in this study, first the laminar mixed convection inside rectangular enclosure with moving wall and aspect ratio=10 is modeled and then the results are compared with other investigate. after showing varity of results, the investigation is continued with tur...

this work investigates the response of two-dimensional, turbulent boundary layer characteristics over a flat plate to the presence of suspended particulate matter. both phases are assumed to be interacting continua. that is, the carrier fluid equations are considered to be coupled with the particle-phase equations. a finite-difference technique with non-uniform grid has been employed for the so...

A high-resolution large-eddy simulation model has been used to investigate the effect of scale in surface inhomogeneities on the turbulence structure of the convective boundary layer (CBL). Surface heat fluxes were varied sinusoidally in two dimensions with wavelengths of 250,500 and 1000 m, corresponding to about 0.27 zI, 0.55 zi and l . l z i (zi is the boundary layer depth). The geostrophic ...

The basic science of turbulence has been known for many years, yet the knowledge has hardly become a part of operational aviation turbulence forecasting. The history of turbulence forecasting, which has primarily concentrated at elevations above the boundary layer, has been an amalgamation of empirical rules of thumb and forecaster intuition, not of strong theory and conceptual models. Turbulen...

Submitted for the DFD10 Meeting of The American Physical Society Inflow Turbulence Generation and Oblique Shock / Turbulent Boundary Layer Interaction1 BRANDON MORGAN, Graduate Student, Stanford, SOSHI KAWAI, Postdoctoral Fellow, Stanford, SANJIVA LELE, Professor, Stanford — Large-eddy simulation of an oblique shock impinging on a supersonic turbulent boundary layer (M∞ = 2.28, φ = 8 ̊, Reθ = 18...

To simulate the effect of free st ream turbulence on turbulent spot formation, experiments were conducted on the interaction of localized three-dimensional disturbances with the harmonic waves in a laminar boundary layer on a flat plate. Experiments conducted in three-dimensional diverging flow (but zero pressure gradient) show, while individually the disturbances decay downstream, their intera...