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Nonlinear mushy-layer convection with chimneys: stability and optimal solute fluxes
Nonlinear mushy-layer convection chimneys stability and optimal solute fluxes Fluid Dynamics
2012/5/28
We model buoyancy-driven convection with chimneys -- channels of zero solid fraction -- in a mushy layer formed during directional solidification of a binary alloy in two-dimensions. A large suite of ...
Heat transport by turbulent Rayleigh-Bénard convection for $\Pra\ \simeq 0.8$ and $3\times 10^{12} \alt \Ra\ \alt 10^{15}$: Aspect ratio $Γ= 0.50$
turbulent Rayleigh-Bénard convection Heat transport Fluid Dynamics
2012/5/17
We report experimental results for heat-transport measurements, in the form of the Nusselt number \Nu, by turbulent Rayleigh-B\'enard convection in a cylindrical sample of aspect ratio $\Gamma \equiv ...
Heat transport and flow structure in rotating Rayleigh-Benard convection
Rotating Rayleigh-Benard convection direct numerical simulation experiments heat transfer different turbulent states flow structure
2012/4/24
Here we summarize the results from our direct numerical simulations (DNS) and experimental measurements on rotating Rayleigh-B\'enard (RB) convection. Our experiments and simulations are performed in ...
Downward Causation in Fluid Convection
causation fluid dynamics convection nonlinear dynamics
2011/9/6
Recent developments in nonlinear dynamics have found wide application in many areas of science from physics to neuroscience. Nonlinear phenomena such as feedback loops, inter-level relations, wholes c...
Fluid Convection, Constraint and Causation
Complexity nonlinear dynamics contextual emergence causal foundationalism laws
2011/9/6
Complexity–nonlinear dynamics for my purposes in this essay–is rich with metaphysical and epistemological implications but is only recently receiving sustained philosophical analysis. I will explore s...
Numerical simulations of convection in a layer filled with ideal gas are presented. The control parameters are chosen such that there is a significant variation of density of the gas in going from the...
Gas dynamics in high-luminosity polarized He-3 targets using diffusion and convection
University of Virginia, Charlottesville
2011/8/3
Abstract: The dynamics of the movement of gas is discussed for two-chambered polarized He-3 target cells of the sort that have been used successfully for many electron scattering experiments. A detail...
Destabilization of free convection by weak rotation
Destabilization free convection weak rotation Fluid Dynamics
2011/8/3
Abstract: This study offers an explanation of a recently observed effect of destabilization of free convective flows by weak rotation. After studying several models where flows are driven by a simulta...
Low-dimensional model of turbulent Rayleigh-Benard convection in a Cartesian cell with square domain
Low-dimensional model Rayleigh-Benard convection Cartesian cell
2011/9/5
A low-dimensional model (LDM) for turbulent Rayleigh-B磂nard convection in a Cartesian cell with square domain, based on the Galerkin projection of the Boussinesq equations onto a finite set of empiric...
Scaling laws prediction from a solvable model of turbulent thermal convection
Turbulent flows, convection and heat transfer Turbulence simulation and modeling
2011/8/31
A solvable turbulent model is used to predict both the structure of the boundary layer and the scaling laws in thermal convection. The transport of heat depends on the interplay between the thermal, v...
Momentum transport and torque scaling in Taylor-Couette flow from an analogy with turbulent convection
Convection and heat transfer Taylor-Couette flow
2011/8/31
We generalize an analogy between rotating and strati ed shear ows. This analogy is summarized in Table 1. We use this analogy in the unstable case (centrifugally unstable ow v.s. convection)to compute...
Scaling in large Prandtl number turbulent thermal convection
Turbulent fiows convection and heat transfer Turbulence simulation and modeling
2011/9/13
We study the scaling properties of heat transfer Nu in turbulent thermal convection at large Prandtl number Pr using a quasi-linear theory. We show that two regimes arise, depending on the Reynolds nu...
Natural convection flow of a Couple stress fluid between two vertical parallel plates with Hall and Ion-slip effects
Free convection Couple stress fluid Magnetohydrodynamics Hall and ion-slip effects HAM
2012/2/24
The Hall and ion-slip effects on fully developed electrically conducting couple stress fluid flow between vertical parallel plates in the presence of a temperature dependent heat source are investigat...
Effect of rotation on thermosolutal convection in a Rivlin-Ericksen fluid permeated with suspended particles in porous medium
Rivlin-Ericksen fluid suspended particles rotation
2010/9/26
The thermosolutal convection in Rivlin-Ericksen elastico-viscous fluid in porous medium is considered to include the effect of suspended particles and rotation. The sufficient conditions for the valid...
Steady thermocapillary-buoyant convection in a shallow annular pool. Part 2: Two immiscible fluids
Thermocapillary-buoyant flow Asymptotic solution Shallow annular pool Two-layer system
2012/2/29
This work is devoted to the study of steady thermocapillary-buoyant convection in a system of two horizontal superimposed immiscible liquid layers filling a lateral heated thin annular pool. The gover...