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Communications in Computational Physics 2011年第5期9卷 1284-1292页

作者： Alessandro De Maio Silvia Palpacelli Sauro Succi Numidia s.r.l. via Berna 3100144 RomaItaly istituto applicazioni calcolo CNRvia dei Taurini 1900185 RomaItaly Freiburg Institute for Advanced Studies School of Soft Matter ResearchAlbertstr.1979104 Freiburg im BreisgauFreiburgGermany

A new boundary condition,aimed at inhibiting near-wall condensation effects in lattice Boltzmann simulations of capillary flows in micro-corrugated channels,is *** new boundary condition is validated against analytical solutions for smooth channels and demonstrated for the case of three-dimensional microflows over randomly corrugated walls.

关键词： Microfluidics capillary flows lattice Boltzmann simulation

Lattice Boltzmann Analysis of Fluid-Structure Interaction with Moving Boundaries

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Communications in Computational Physics 2013年第3期13卷 823-834页

作者： Alessandro De Rosis Giacomo Falcucci Stefano Ubertini Francesco Ubertini Sauro Succi Department of Civil Environmental and Materials EngineeringUniversity of BolognaBologna 40136Italy Department of Technologies University of Naples“Parthenope”NaplesItaly DEIM-Industrial Engineering School University of TusciaLargo dell’Universit`a s.n.c.01100ViterboItaly istituto per le applicazioni del calcolo-cnr Via dei Taurini00100 RomaItaly

This work is concerned with the modelling of the interaction of fluid flow with flexibly supported rigid *** fluid flow is modelled by Lattice-Boltzmann Method,coupled to a set of ordinary differential equations describing the dynamics of the solid body in terms its elastic and damping *** time discretization of the body dynamics is performed via the Time Discontinuous Galerkin *** numerical examples are presented and highlight the robustness and efficiency of the proposed methodology,by means of comparisons with previously published *** examples show that the present fluid-structure method is able to capture vortexinduced oscillations of flexibly-supported rigid body.

关键词： Lattice-Boltzmann method fluid-structure interaction

Lattice Boltzmann Simulation of Cavitating Flows

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Communications in Computational Physics 2013年第3期13卷 685-695页

作者： Giacomo Falcucci Stefano Ubertini Gino Bella Sauro Succi Department of Technologies University of Naples“Parthenope”Centro Direzionale-Isola C480143 NaplesItaly DEIM-Industrial Engineering School University of TusciaLargo dell’Universita s.n.c.01100ViterboItaly Department of Mechanical Engineering University of“Tor Vergata”Viale PolitecnicoRomeItaly istituto per le applicazioni del calcolo-cnr Via dei Taurini00100 RomaItaly

The onset of cavitating conditions inside the nozzle of liquid injectors is known to play a major role on spray characteristics,especially on jet penetration and *** this work,we present a Direct Numerical Simulation(DNS)based on the Lattice Boltzmann Method(LBM)to study the fluid dynamic field inside the nozzle of a cavitating *** formation of the cavitating region is determined via a multi-phase approach based on the Shan-Chen equation of *** results obtained by the LBM simulation show satisfactory agreement with both numerical and experimental *** addition,numerical evidence of bubble break-up,following upon flow-induced cavitation,is also reported.

关键词： Lattice Boltzmann multiphase flows cavitation liquid spray nozzle

Lattice Boltzmann Models with Mid-Range Interactions

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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.

Prospective Merger Between Car-Parrinello and Lattice Boltzmann Methods for Quantum Many-Body Simulations

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Communications in Computational Physics 2011年第5期9卷 1137-1151页

作者： Sauro Succi Silvia Palpacelli istituto applicazioni calcolo CNRvia dei Taurini 1900185 RomaItaly Freiburg Institute for Advanced Studies Albert-Ludwigs-Universität Freiburg Albertstraβe 19D-79104 Freiburg i.Br.Germany Numidia s.r.l. via Berna 3100144 RomaItaly

Formal analogies between the Car-Parrinello(CP)ab-initio molecular dynamics for quantum many-body systems,and the Lattice Boltzmann(LB)method for classical and quantum fluids,are pointed out.A theoretical scenario,whereby the quantum LB would be coupled to the CP framework to speed-up many-body quantum simulations,is also discussed,together with accompanying considerations on the computational efficiency of the prospective CP-LB scheme.

关键词： Quantum many-body problems Car-Parrinello ab-initio molecular dynamics lattice Boltzmann method

Factors influencing the drug release from calcium phosphate cements

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Bioactive Materials 2022年第1期7卷 341-363页

作者： Marco Fosca Julietta V.Rau Vuk Uskokovi istituto di Struttura della Materia Consiglio Nazionale delle Ricerche(ISM-CNR)Via del Fosso del Cavaliere 10000133RomeItaly I.M.Sechenov First Moscow State Medical University Institute of PharmacyDepartment of AnalyticalPhysical and Colloid ChemistryTrubetskaya 8build.2119991MoscowRussia Advanced Materials and Nanobiotechnology Laboratory TardigradeNano LLCIrvineCA 92604United States

Thanks to their biocompatibility,biodegradability,injectability and self-setting properties,calcium phosphate cements(CPCs)have been the most economical and effective biomaterials of choice for use as bone void *** have also been extensively used as drug delivery carriers owing to their ability to provide for a steady release of various organic molecules aiding the regeneration of defective bone,including primarily antibiotics and growth *** review provides a systematic compilation of studies that reported on the controlled release of drugs from CPCs in the last 25 *** chemical,compositional and microstructural characteristics of these systems through which the control of the release rates and mechanisms could be achieved have been *** doing so,the effects of(i)the chemistry of the matrix,(ii)porosity,(iii)additives,(iv)drug types,(v)drug concentrations,(vi)drug loading methods and(vii)release media have been distinguished and discussed *** specificities of in vivo release of drugs from CPCs have been reviewed,*** the kinetic and mechanistic correlations between the CPC properties and the drug release is a prerequisite for the design of bone void fillers with drug release profiles precisely tailored to the application area and the clinical *** goal of this review has been to shed light on these fundamental correlations.

关键词： Calcium phosphate cements Drug release Release rate Antibiotics release Bone fillers

Comparison of Lattice Boltzmann,Finite Element and Volume of Fluid Multicomponent Methods for Microfluidic Flow Problems and the Jetting of Microdroplets

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Communications in Computational Physics 2023年第3期33卷 912-936页

作者： Karun P.N.Datadien Gianluca Di Staso Christian Diddens Herman M.A.Wijshoff Federico Toschi Department of Applied Physics and Science Education Eindhoven University of Technology5600MB EindhovenNetherlands FLOW Matters Consultancy B.V. 5612AEEindhovenThe Netherlands Physics of Fluids group Department of Science and TechnologyMesa+InstituteMax Planck Center for Complex Fluid Dynamics and J.M.Burgers Centre for Fluid DynamicsUniversity of TwenteP.O.Box 2177500 AE EnschedeThe Netherlands Canon Production Printing Netherlands B.V. 5914 HHVenloThe Netherlands Department of Mathematics and Computer Science Eindhoven University of Technology5600MB EindhovenNetherlands istituto per le applicazioni del calcolo Consiglio Nazionale delle Ricerche00185 RomeItaly.

We show that the lattice Boltzmann method(LBM)based color-gradient model with a central moments formulation(CG-CM)is capable of accurately simulating the droplet-on-demand inkjetting process on a micrometer length scale by comparing it to the Arbitrary Lagrangian Eulerian Finite Element Method(ALE-FEM).A full jetting cycle is simulated using both CG-CM and ALE-FEMand results are quantitatively compared by measuring the ejected ink velocity,volume and contraction *** also show that the individual relevant physical phenomena are accurately captured by considering three test-cases;droplet oscillation,ligament contraction and capillary *** first two cases test accuracy for a dynamic system where surface tension is the driving force and the third case is designed to test wetting boundary *** the first two cases we also compare the CG-CM and ALE-FEM results to Volume of Fluid(VOF)*** of the three methods shows close agreement when compared to each other and analytical solutions,where *** we demonstrate that asymmetric jetting is achievable using 3D CG-CM simulations utilizing asymmetric wetting conditions inside the *** allows for systematic investigation into the physics of asymmetric jetting,*** to jet-nozzle manufacturing imperfections or due to other disturbances.

关键词： Lattice Boltzmann method multiphase flow multicomponent flow inkjet printing

Molecular Dynamics Simulations of Nanoparticle Interactions with a Planar Wall:Does Shape Matter?

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Communications in Computational Physics 2013年第3期13卷 900-915页

作者： Andreas Fuchs David Kauzlaric Andreas Greiner Sauro Succi Jan.G.Korvink Laboratory for Simulation Department of Microsystems Engineering(IMTEK)University of FreiburgGeorges-Kohler-Allee 10379110 FreiburgGermany School of Soft Matter Research Freiburg Institute for Advanced StudiesUniversity of FreiburgAlbertstr.1979104 FreiburgGermany istituto applicazioni calcolo CNRvia dei Taurini 900185RomaItaly

We investigate the hydrodynamic interactions of spherical colloidal nano particles and nano tetrahedra near a planar wall by means of molecular dynamics(MD)simulations of rigid particles within an all-atom *** both spherical and nano-tetrahedral particles,we find that the parallel and perpendicular components of the local diffusion coefficient and viscosity,show good agreement with hydrodynamic theory of Fax´en and *** provides further evidence that low perturbations from sphericality of a nanoparticle’s shape has little influence on its local diffusive behaviour,and that for this particular case,the continuum theory fluid dynamics is valid even down to molecular scales.

关键词： Molecular dynamics simulation nanoparticle hydrodynamic interaction

A Lattice Boltzmann Study of Phase Separation in Liquid-Vapor Systems with Gravity

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Communications in Computational Physics 2010年第2期7卷 350-361页

作者： Artur Cristea Giuseppe Gonnella Antonio Lamura Victor Sofonea Center for Fundamental and Advanced Technical Research Romanian AcademyBd.Mihai Viteazul 24300223 Timi¸soaraRomania Dipartimento di Fisica Universita di Bari and INFNSezione di BariVia Amendola 17370126 BariItaly istituto applicazioni calcolo CNRVia Amendola 122/D70126 BariItaly

Phase separation of a two-dimensional van der Waals fluid subject to a grav-itational force is studied by numerical simulations based on lattice Boltzmann methodsimplemented with a finite difference scheme. A growth e... 详细信息

关键词： Lattice Boltzmann phase separation liquid-vapor gravity

On Spiral Waves Arising in Natural Systems

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Communications in Computational Physics 2010年第8期8卷 610-622页

作者： D.Bini C.Cherubini S.Filippi A.Gizzi P.E.Ricci istituto per le applicazioni del calcolo“M.Picone” CNR I-00161 RomeItaly International Center for Relativistic Astrophysics-I.C.R.A. University of Rome“La Sapienza”I-00185 RomeItaly Nonlinear Physics and Mathematical Modeling Lab Faculty of EngineeringUniversity Campus Bio-MedicoI-00128 RomeItaly Alberto Sordi Foundation-Research Institute on Aging I-00128 RomeItaly Mathematics Department University of Rome“La Sapienza”I-00185 RomeItaly

Spiral waves appear in many different natural contexts:excitable biological tissues,fungi and amoebae colonies,chemical reactions,growing crystals,fluids and gas eddies as well as in *** the existing theories explain the presence of spirals in terms of nonlinear parabolic equations,it is explored here the fact that selfsustained spiral wave regime is already present in the linear heat operator,in terms of integer Bessel functions of complex *** solutions,even if commonly not discussed in the literature because diverging at spatial infinity,play a central role in the understanding of the universality of spiral *** particular,we have studied how in nonlinear reaction-diffusion models the linear part of the equations determines the wave front appearance while nonlinearities are mandatory to cancel out the blowup of *** spiral wave pattern still requires however at least two cross-reacting species to be physically *** implications of such a results are discussed.

关键词： Reaction-diffusion equations biophysics crystal growth heat transfer