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Lattice Boltzmann Models with Mid-Range Interactions

Communications in Computational Physics 2007年第6期2卷 1071-1084页

作者： Giacomo Falcucci Gino Bella Giancarlo Chiatti Sergio Chibbaro mauro sbragaglia Sauro Succi Department of Mechanical and Industrial Engineering University of“Roma Tre”Via della Vasca Navale 7900146 RomeItaly Department of Mechanical Engineering University of“Tor Vergata”Viale PolitecnicoRomeItaly Istituto Applicazioni Calcolo CNRV.le del Policlinico 13700161RomeItaly Faculty of Applied Sciences Impact and BurgerscentrumUniversity of TwenteP.O.Box 217AE 7500 EnschedeThe Netherlands.

An extension of the standard Shan-Chen model for non ideal-fluids,catering for mid-range,soft-core and hard-core repulsion,is *** is shown that the inclusion of such mid-range interactions does not yield any visible enhancement of the density jump across the dense and light *** an enhancement can however be obtained by tuning the exponents of the effective *** results also indicate that the inclusion of soft-core repulsion can prevent the coalescence of neighborhood bubbles,thereby opening the possibility of tailoring the size of multi-droplet configurations,such as sprays and related phase-separating fluids.

关键词： Lattice-Boltzmann pseudopotential phase-separation.

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Daily activity rhythms, chronotypes, and risk-taking behavior in the signal crayfish

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Current Zoology 2022年第2期68卷 177-183页

作者： Valerio sbragaglia Thomas BREITHAUPT Department of Marine Renewable Resources Marine Science Institute(ICM-CSIC)Passeig Maritim de la Barceloneta3708003 BarcelonaSpain Department of Biology and Ecology of Fishes Leibniz-lnstitute of Freshwater Ecology and Inland FisheriesMüggelseedamm 31012587 BerlinGermany Department of Biological and Marine Sciences University of HullCottingham RoadHull HU67RXUK

Consistent inter-individual differences in daily activity rhythms(i.e.,chronotypes)can have ecological consequences in determining access to food resources and avoidance of *** most common measure to characterize chronotypes in animals as well as humans is the onset of activity(i.e.,early or late chronotypes).However,daily activity rhythms may also differ in the relative amount of activity displayed at particular time ***,chronotypes may also be linked to other consistent inter-individual differences in behavior(i.e.,personality),such as the propensity to take ***,we used the signal crayfish Pacifastacus leniusculusto test the presence of chronotypes and risk-taking personality traits and a potential behavioral syndrome between these *** first exposed crayfish to 5 days of light-darkness to measure daily activity rhythms and then we applied a visual predator-simulating stimulus in 2 different contexts(neutral and food).Our results showed consistent(i.e.,across 5 days)inter-individual differences in the relative nocturnal activity displayed in the early and middle,but not in the late part of darkness ***,while crayfish displayed inter-individual differences in risk-taking behavior,these were not found to be consistent across 2 ***,we were not able to formally test a behavioral syndrome between these 2 *** conclusion,our study provides the first evidence of chronotypes in the relative amount of activity displayed at particular time *** could be a valuable information for applied ecological aspects related to the signal crayfish,which is a major invasive species of freshwater ecosystems.

关键词： behavioral syndrome biological rhythms boldness feeding locomotor activity

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Simulations of Boiling Systems Using a Lattice Boltzmann Method

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Communications in Computational Physics 2013年第3期13卷 696-705页

作者： L.Biferale P.Perlekar M.sbragaglia F.Toschi Department of Physics and INFN University of Tor VergataVia della Ricerca Scientifica 100133 RomeItaly Department of Physics and Department of Mathematics and Computer Science Eindhoven University of Technology5600 MB EindhovenThe Netherlands

We report about a numerical algorithm based on the lattice Boltzmann method and its applications for simulations of turbulent convection in multi-phase *** discuss the issue of’latent heat’definition using a thermodynamically consistent pseudo-potential on the *** present results of numerical simulations in 3D with and without boiling,showing the distribution of pressure,density and temperature fluctuations inside a convective cell.

关键词： Lattice Boltzmann equation boiling thermal convection

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A Study of Fluid Interfaces and Moving Contact Lines Using the Lattice Boltzmann Method

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Communications in Computational Physics 2013年第3期13卷 725-740页

作者： S.Srivastava P.Perlekar L.Biferale M.sbragaglia J.H.M.ten Thije Boonkkamp F.Toschi Department of Applied Physics Eindhoven University of TechnologyPO Box 5135600 MB EindhovenThe Netherlands Department of Mathematics and Computer Science Eindhoven University of TechnologyPO Box 5135600 MB EindhovenThe Netherlands Department of Physics and INFN University of Rome Tor VergataVia della Ricerca Scientifica 100133 RomeItaly

We study the static and dynamical behavior of the contact line between two fluids and a solid plate by means of the Lattice Boltzmann method(LBM).The different fluid phases and their contact with the plate are simulated by means of standard Shan-Chen *** investigate different regimes and compare the multicomponent *** multiphase LBM models near the contact line.A static interface profile is attained with the multiphase model just by balancing the hydrostatic pressure(due to gravity)with a pressure jump at the *** order to study the same problem with the multicomponent case we propose and validate an idea of a body force acting only on one of the two fluid *** order to reproduce results matching an infinite bath,boundary conditions at the bath side play a key *** quantitatively compare open and wall boundary conditions and study their influence on the shape of the meniscus against static and lubrication theory solution.

关键词： Lattice-Boltzmann multiphase flow multicomponent flow plunging plate problem Landau-Levich

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