Search
Now showing items 331-340 of 564
A Numerical Technique for Linear Elliptic PDEs in Polygonal Domains
(Royal Society PublishingProceedings of the Royal Society A, 2015-02-11)
Integral representations for the solution of linear elliptic partial differential equations (PDEs) can be obtained using Green's theorem. However, these representations involve both the Dirichlet and the Neumann values on ...
Efficient mixing in stratified flows: experimental study of a Rayleigh-Taylor unstable interface within an otherwise stable stratification
(Cambridge University PressJournal of Fluid Mechanics, 2014-09-09)
Boussinesq salt-water laboratory experiments of Rayleigh–Taylor instability (RTI) can achieve mixing efficiencies greater than 0.75 when the unstable interface is confined between two stable stratifications. This is much ...
On the thermodynamic boundary conditions of a solidifying mushy layer with outflow
(CUPJournal of Fluid Mechanics, 2014-11-27)
The free-boundary problem between a liquid region and a mushy layer (a reactive porous medium) must respect both thermodynamic and fluid dynamical considerations. We develop a steady two-dimensional forced-flow configuration ...
A physically based parameterization of gravity drainage for sea-ice modelling
(Wiley on behalf of the American Geophysical UnionJournal of Geophysical Research: Oceans, 2014-09-02)
We incorporate a physically derived parameterization of gravity drainage,
in terms of a convective upwelling velocity, into a one-dimensional, thermodynamic sea-
ice model of the kind currently used in coupled climate ...
Vortex rings impinging on permeable boundaries
(Physics of Fluids, 2015-01-17)
Experiments with vortex rings impinging permeable and solid boundaries are presented in order to investigate the influence of permeability. Utilizing Particle Image Velocimetry, we compared the behaviour of a vortex ring ...
Resonances in coupled πK, ηK scattering from lattice QCD
(APSPhysical Review D, 2015-03-10)
Coupled-channel πK and ηK scattering amplitudes are determined by studying the finite-volume energy spectra obtained from dynamical lattice QCD calculations. Using a large basis of interpolating operators, including both ...
Minimal Massive 3D Gravity Unitarity Redux
(IOPClassical and Quantum Gravity, 2015-02-26)
A geometrical analysis of the bulk and anti-de Sitter boundary unitarity conditions
of 3D “Minimal Massive Gravity” (MMG) (which evades the “bulk/boundary clash” of
Topologically Massive Gravity) is used to extend and ...
Uniqueness of the Kerr-de Sitter spacetime as an algebraically special solution in five dimensions
(SpringerCommunications in Mathematical Physics, 2015-08-20)
We determine the most general solution of the five-dimensional vacuum Einstein equation, allowing for a cosmological constant, with (i) a Weyl tensor that is type II or more special in the classification of Coley et al., ...
Vortex-ring-induced stratified mixing
(Cambridge University PressJournal of Fluid Mechanics, 2015-09-16)
There is tantalizing evidence that some mechanically driven stratified flows tend towards a state of constant mixing efficiency. We provide insight into the energy balance leading to the constant mixing efficiency and ...