Department of Materials Science and Metallurgy: Recent submissions

Now showing items 141-160 of 648

  • Growth of eccentric modes in disc–planet interactions 

    Teyssandier, Jean Adrien; Ogilvie, Gordon Ian (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-03-07)
    We formulate a set of linear equations that describe the behaviour of small eccentricities in a protoplanetary system consisting of a gaseous disc and a planet. Eccentricity propagates through the disc by means of pressure ...

  • Asymptotic analysis of cold sandwich rolling 

    Cawthorn, Christopher John; Minton, Jeremy; Brambley, Edward James (ElsevierInternational Journal of Mechanical Sciences, 2015-12-22)
    An analytical model for the cold rolling of sandwich sheets is proposed, assuming a rigid-plastic flow rule and Coulomb friction. Asymptotic analysis is used to solve the equations based on the assumptions of small aspect ...

  • Energy requirement for a working dynamo 

    Proctor, Michael Richard (Taylor & FrancisGeophysical & Astrophysical Fluid Dynamics, 2015-10-13)
    There has for many years been interest in finding necessary conditions for dynamo action. These are usually expressed in terms of bounds on integrated properties of the flow. The bounds can clearly be improved when the ...

  • Dynamics of laterally confined marine ice sheets 

    Kowal, Katarzyna N; Pegler, Samuel S; Worster, Michael Grae (Cambridge University PressJournal of Fluid Mechanics, 2016-02-03)
    We present an experimental and theoretical study of the dynamics of laterally confined marine ice sheets in the natural limit in which the long, narrow channel into which they flow is wider than the depth of the ice. A ...

  • Assessment of ice flow dynamics in the zone close to the calving front of Antarctic ice shelves 

    Wearing, Martin G; Hindmarsh, Richard CA; Worster, Michael Grae (International Glaciological SocietyJournal of Glaciology, 2015-12-01)
    We investigate the relationship between four ice-shelf characteristics in the area close to the calving front: ice flow speed, strain rate, ice thickness and shelf width. Data are compiled for these glaciological parameters ...

  • Enhanced active swimming in viscoelastic fluids 

    Riley, Emily E; Lauga, Eric Jean-Marie (IOP PublishingEurophysics Letters, 2014-11-05)
    Swimming microorganisms often self-propel in fluids with complex rheology. While past theoretical work indicates that fluid viscoelasticity should hinder their locomotion, recent experiments on waving swimmers suggest a ...

  • Quantum communication complexity advantage implies violation of a Bell inequality 

    Buhrman, Harry; Czekaj, Lukasz; Grudka, Andrzej; Horodecki, Michal; Horodecki, Pawel; Markiewicz, Marcin; Speelman, Florian; Strelchuk, Sergii (National Academy of SciencesProceedings of the National Academy of Sciences, 2016-03-08)
    We obtain a general connection between a large quantum advantage in communication complexity and Bell non-locality. We show that given any protocol offering a sufficiently large quantum advantage in communication complexity, ...

  • Propulsion of Bubble-Based Acoustic Microswimmers 

    Bertin, Nicolas; Spelman, Tamsin A; Stephan, Olivier; Gredy, Laetitia; Bouriau, Michel; Lauga, Eric Jean-Marie; Marmottant, Philippe (American Physical SocietyPhysical Review Applied, 2015-12-29)
    Acoustic microswimmers present a great potential for microfluidic applications and targeted drug delivery. Here, we introduce armored microbubbles (size range, 10–20 μm) made by three-dimensional microfabrication, which ...

  • Evaporation effects in elastocapillary aggregation 

    Hadjittofis, Andreas; Lister, John Ronald; Singh, Kiran; Vella, Dominic (Cambridge University PressJournal of Fluid Mechanics, 2016)
    We consider the effect of evaporation on the aggregation of a number of elastic objects due to a liquid’s surface tension. In particular, we consider an array of spring–block elements in which the gaps between blocks are ...

  • End point of Black Ring Instabilities and the Weak Cosmic Censorship Conjecture 

    Figueras, Pau; Kunesch, Markus; Tunyasuvunakool, Saran (American Physical SocietyPhysical Review Letters, 2016-02-18)
    We produce the first concrete evidence that violation of the weak cosmic censorship conjecture can occur in asymptotically flat spaces of five dimensions by numerically evolving perturbed black rings. For certain thin ...

  • Diffusion tensor imaging with deterministic error bounds 

    Gorokh, Artur; Korolev, Yury; Valkonen, Tuomo (SpringerJournal of Mathematical Imaging and Vision, 2016)
    Errors in the data and the forward operator of an inverse problem can be handily modelled using partial order in Banach lattices. We present some existing results of the theory of regularisation in this novel framework, ...

  • Distinguishing black-hole spin-orbit resonances by their gravitational wave signatures. II: Full parameter estimation 

    Trifirò, Daniele; O'Shaughnessy, Richard; Gerosa, Davide; Berti, Emanuele; Kesden, Michael; Littenberg, Tyson; Sperhake, Ulrich (American Physical Society, 2016)
    Gravitational waves from coalescing binary black holes encode the evolution of their spins prior to merger. In the post-Newtonian regime and on the precession timescale, this evolution has one of three morphologies, with ...



  • Classical and quantum solutions in Brans-Dicke cosmology with a perfect fluid 

    Paliathanasis, Andronikos; Tsamparlis, Michael; Basilakos, Spyros; Barrow, John David (American Physical SocietyPhysical Review D, 2016)
    We consider the application of group invariant transformations in order to constrain a flat isotropic and homogeneous cosmological model, containing of a Brans-Dicke scalar field and a perfect fluid with a constant equation ...

  • Slender-ribbon theory 

    Koens, Lyndon Mathijs; Lauga, Eric Jean-Marie (American Institute of PhysicsPhysics of Fluids, 2016-01-11)
    Ribbons are long narrow strips possessing three distinct material length scales (thickness, width, and length) which allow them to produce unique shapes unobtainable by wires or filaments. For example, when a ribbon has ...

  • Separable projection integrals for higher-order correlators of the cosmic microwave sky: Acceleration by factors exceeding 100 

    Briggs, JP; Pennycook, SJ; Fergusson, James Robert; Jäykkä, J; Shellard, Edward Paul (ElsevierJournal of Computational Physics, 2016-01-19)
    We present a case study describing efforts to optimise and modernise “Modal”, the simulation and analysis pipeline used by the Planck satellite experiment for constraining general non-Gaussian models of the early universe ...

  • ATLAS diboson excess could be an R-parity violating dismuon excess 

    Allanach, Benjamin Christopher; Dev, PS Bhupal; Sakurai, Kazuki (American Physical SocietyPhysical Review D, 2016-02-09)
    We propose a new possible explanation of the ATLAS diboson excess: that it is due to heavy resonant slepton production, followed by decay into dismuons. The smuon has a mass not too far from the W and Z masses, and so it ...

  • Stability of saddle points via explicit coderivatives of pointwise subdifferentials 

    Clason, Christian; Valkonen, Tuomo (Springer, 2016)
    We derive stability criteria for saddle points of a class of nonsmooth optimization problems in Hilbert spaces arising in PDE-constrained optimization, using metric regularity of infinite-dimensional set-valued mappings. ...

  • Linear and nonlinear wave propagation in booming sand dunes 

    Vriend, Nathalie Maria; Hunt, ML; Clayton, RW (AIPPhysics of Fluids, 2015-10-27)
    The current field study examines linear and non-linear acoustic waves found in large desert sand dunes using field measurements of wave speed, frequency content, dispersion, and polarization. At the dune fields visited, ...