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An Analytic Solution for Gust-Aerofoil Interaction Noise Including Effects of Geometry
(Oxford University PressIMA Journal of Applied Mathematics, 2016)
An analytic solution is obtained for the sound generated by gust-aerofoil interaction for aerofoils with thickness, camber, and angle of attack. The model is based on the linearisation of the Euler equations about a steady ...
Particle organization after viscous sedimentation in tilted containers
(American Institute of PhysicsPhysics of Fluids, 2016-07-19)
A series of sedimentation experiments and numerical simulations have been conducted
to understand the factors that control the final angle of a static sediment
layer formed by quasi-monodisperse particles settling in an ...
Volume preservation by Runge–Kutta methods
(ElsevierApplied Numerical Mathematics, 2016-07-12)
It is a classical theorem of Liouville that Hamiltonian systems preserve volume in phase space. Any symplectic Runge–Kutta method will respect this property for such systems, but it has been shown by Iserles, Quispel and ...
Turbulent mixing, restratification, and phytoplankton growth at a submesoscale eddy
(WileyGeophysical Research Letters, 2016-05-13)
High-resolution large-eddy simulations are used to study the influence of submesoscale mixed layer instability and small-scale turbulence on phytoplankton growth in light-limited conditions. Four simulations are considered ...
Near-wall diffusion tensor of an axisymmetric colloidal particle
(American Institute of Physics PublishingThe Journal of Chemical Physics, 2016-07-21)
Hydrodynamic interactions with confining boundaries often lead to drastic changes in the diffusive behaviour of microparticles in suspensions. For axially symmetric particles, earlier numerical studies have suggested a ...
On the quadratic invariant of binary sextics
(Cambridge University PressMathematical Proceedings of the Cambridge Philosophical Society, 2016-07-28)
We provide a geometric characterisation of binary sextics with vanishing quadratic invariant.
Turbulent mixing due to the Holmboe wave instability at high Reynolds number
(Cambridge University PressJournal of Fluid Mechanics, 2016)
We consider numerically the transition to turbulence and associated mixing in stratified shear flows with initial velocity distribution $\bar U$(z, 0)e$_{x}$ = U$_{0}$e$_{x}$ tanh(z/d) and initial density distribution $\bar ...
Density diagnostics derived from the O IV and S IV intercombination lines observed by IRIS
(EDP SciencesAstronomy & Astrophysics, 2016)
The intensity of the O IV 2s$^{2}$ 2p $^{2}$P-2s2p$^{2}$ $^{4}$P and S IV 3 s$^{2}$ 3p $^{2}$P- 3s 3p$^{2}$ $^{4}$ P intercombination lines around 1400 Å observed with the Interface Region Imaging Spectrograph (IRIS) provide ...
On the nature of the magnetic Rayleigh–Taylor instability in astrophysical plasma: the case of uniform magnetic field strength
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-07-28)
The magnetic Rayleigh–Taylor instability has been shown to play a key role in many astrophysical systems. The equation for the growth rate of this instability in the incompressible limit, and the most-unstable mode that ...
Tunable shear thickening in suspensions
(National Academy of SciencesProceedings of the National Academy of Sciences, 2016-09-12)
Shear thickening, an increase of viscosity with shear rate, is a ubiquitous phenomenon in suspended materials that has implications for broad technological applications. Controlling this thickening behavior remains a major ...