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Turbulent Vortieity Transport in Three Dimensions
Turbulent Vortieity Transport Three Dimensions
2016/5/18
The nature of vorticity transport in three-dimensional turbulent flow is investigated using data from a direct numerical simulation of channel flow. An extension of Taylor's (1932) vorticity transport...
Turbulent flow properties of large-scale vortex systems
gridfree turbulence vortex methods
2016/5/18
Large-scale computations of dynamically interacting vortex tubes forming filaments are performed with a view toward investigating their relationship to turbulent fluid flow. It is shown that the stati...
Grid-Free Simulation of the Spatially Growing Turbulent Mixing Layer
Grid-Free Simulation Spatially Growing Turbulent Mixing Layer
2016/5/18
The spatially developing, unforced, turbulent mixing layer is simulated via a grid-free vortex method. Vortex filaments composed of straight tubes are used as the computational element with new vortex...
Vortex filament simulation of the turbulent coflowing jet
Vortex filament simulation turbulent coflowing jet
2016/5/18
A high resolution grid-free vortex filament scheme is applied to the prediction and simulation of coflowing round jets with a view to acquiring a new perspective on their physics and establishing the ...
Vortex Filament Simulation of the Turbulent Boundary Layer
Vortex Filament Simulation Turbulent Boundary Layer
2016/5/18
A hybrid vortex fi lament scheme with the capability of simulating bounded turbulent fl ows is described. Viscous generation of new vortex elements at solid surfaces is accomplished through the interm...
Vortex Dynamics in Transitional and Turbulent Boundary Layers
Vortex Dynamics Transitional Turbulent Boundary Layers
2016/5/18
The dynamics of transitional and turbulent boundary layers is explored via a hybrid vortex filament/finite volume simulation scheme in which vortical structures are identified without the constraints ...
The Role of Small-Scale Topography in Turbulent Mixing of the Global Ocean
Turbulent Mixing Global Ocean
2015/7/29
Maintenance of the observed basin-scale thermohaline (temperature T and salinity S) structure of the world's oceans appears to require mixing to provide dense abyssal waters, which are formed at high ...
Large Eddy Simulation of Compressible Turbulent Channel Flow with Spectral Di®erence method
Large Eddy Simulation Compressible Turbulent Channel Flow Spectral Di® erence method
2015/7/2
This paper presents the development of a three-dimensional high-order solver with unstructured spectral di®erence method. The solver employs the formulations of Sun et al.22 It is implemented on ...
Modeling Exposure Close to Air Pollution Sources in Naturally Ventilated Residences:Association of Turbulent Diffusion Coefficient with Air Change Rate
Air Pollution Sources Naturally Ventilated Residences Turbulent Diffusion Coefficient Air Change Rate
2015/6/30
For modeling exposure close to an indoor air pollution source, an isotropic turbulent diffusion coefficient is used to represent the average spread of emissions. However, its magnitude indoors has bee...
MATHEMATICAL MODEL FOR FRONTOGENESIS IN TURBULENT FLOW THROUGH POROUS MEDIA
Turbulent flow Heterogeneity Frontogenesis Richardson number Drag coefficient Eddy diffusivity
2015/2/4
The effects of horizontal density gradient and nonlinear drag offered by the solid particles on turbulent flow through
geological media are analysed analytically in the presence of a vertical gravita...
Mechanisms of axis-switching and saddle-back velocity profile in laminar and turbulent rectangular jets
axis-switching saddle-back
2015/1/12
e numerically investigate the underlying physics of two peculiar phenomena, which are axis-switching and saddle-back velocity profile, in both laminar and turbulent rectangular jets using lattice Bolt...
A NEW MEAN VELOCITY SCALING FOR TURBULENT BOUNDARY LAYERS
TURBULENT BOUNDARY LAYERS MEAN VELOCITY SCALING
2014/12/30
A new scaling, originally developed for the mean velocity
profile of turbulent pipe flow, was extended to the case of zero
pressure gradient turbulent boundary layers. At low Reynolds
numbers, the ...
TURBULENT TRASITION IN ELECTROMAGNETICALLY LEVITATED LIQUID METAL DROPLETS
TURBULENT TRANSITION ELECTROMAGNETICALLY LEVITATED LIQUID METAL DROPLETS
2014/10/23
The condition of fluid flow has been proven to have a significant influence on a wide variety of material processes. In electromagnetic levitation (EML) experiments, the internal flow is driven primar...
DRA REDUCTION IN TURBULENT FLOWS OVER MICROPATTRNED SUPERHYDROPHOBIC SURFACES
DRAG REDUCTION IN TURBULENT MICROPATTERNED SUPERHYDROPHOBIC SURFACES
2014/10/23
Periodic, micropatterned superhydrophobic surfaces, previously noted for their ability to provide drag reduction in the laminar flow regime, have been demonstrated capable of reducing drag in the turb...
Exploring Fundamental Turbulent Physics Using Direct Numerical Simulation
Fundamental Turbulent Physics Direct Numerical Simulation
2014/10/23
It has been shown in many studies that turbulent flows are highly dependent on their initial conditions. This thesis explores turbulent flow using direct numerical simulation (DNS) in a variety of sit...