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European Physical Journal E
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1.69
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2841
Papers 2872
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A two-dimensional (2-D) cellular automaton-finite difference method (CA-FDM) model and in situ observation experiments of directional solidification using a transparent alloy of SCN-2wt.% ACE are employed to investigate various microstructural evolution of columnar dendrites during directional solidification. In the present model, the growth of columnar dendrites is simulated using a CA technique. The solute diffusion is solved using the FDM. The model is capable of visualizing the interaction b...
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#1Mohammed Elismaili (University of Lorraine)
#2Samah Hamze (University of Lorraine)
Last. David Gonzalez-Rodriguez (University of Lorraine)H-Index: 5
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We study a two-dimensional binary mixture of active and passive colloids as an idealized model of an hybrid aggregate of living cells and inert particles. We perform molecular dynamics simulations of this system using two different thermostats, and we systematically investigate the effect of varying these two effective temperatures on the system behavior, as characterized by its density, structure and thermoelastic properties. Our results indicate that the presence of active colloids shifts the ...
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#1Yiming Fan (SEU: Southeast University)
#2Hui Fang (SEU: Southeast University)H-Index: 1
Last. Mingfang Zhu (SEU: Southeast University)H-Index: 11
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A two-dimensional multiphase cellular automaton (CA) model is proposed for the prediction of growth kinetics and microstructural evolution during peritectic transformation of Fe-C alloys. The proposed model is validated by comparing the simulation results with the experimental measurements and analytical predictions for the growth kinetics of the \gamma-phase and the concentration distributions. The simulated time evolution of the \gamma-phase thickness and the concentration distribution...
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#1Kumar Ankit (ASU: Arizona State University)H-Index: 8
#2Martin E. Glicksman (FIT: Florida Institute of Technology)H-Index: 4
The mechanisms by which interfacial instabilities instigate the growth of solidification patterns is a topic of longstanding interest. In columnar solidification of metallic melts, where the solid-liquid interfacial energy is anisotropic, evolving dendritic patterns compete depending on their relative misorientation. By contrast, organic “plastic crystals”, such as alloys based on succinonitrile, where the anisotropy in their solid-liquid interfacial energy is extremely weak, solidify forming se...
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#1J. C. Loudet (University of Bordeaux)
#2M. Qiu (UBC: University of British Columbia)
Last. J. J. Feng (UBC: University of British Columbia)
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We numerically investigate the influence of interfacial deformations on the drag force exerted on a particle straddling a fluid interface. We perform finite element simulations of the two-phase flow system in a bounded two-dimensional geometry. The fluid interface is modeled with a phase-field method which is coupled to the Navier-Stokes equations to solve for the flow dynamics. The interfacial deformations are caused by the buoyant weight of the particle, which results in curved menisci. We com...
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A capillary tube model reveals that the surface tension at the air-water interface cannot cause the instability of gravity-driven unsaturated slow flow in sandy soils.
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#1Jinyuan LiuH-Index: 1
#2Zhijuan XiongH-Index: 9
Last. Xiangyang ShiH-Index: 64
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#1Nisha KatyalH-Index: 1
#2Supravat DeyH-Index: 4
Last. Sanjay PuriH-Index: 25
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We study the flocking model introduced by Vicsek et al. (Phys. Rev. Lett. 75, 1226 (1995)) in the “coarsening” regime. At standard self-propulsion speeds, we find two distinct growth laws for the coupled density and velocity fields. The characteristic length scale of the density domains grows as L_{\rho}(t) \sim t^{\theta_\rho}(with \theta_\rho \simeq 0.25, while the velocity length scale grows much faster, viz., L_{v}(t) \sim t^{\theta_v}(with \theta_v \simeq 0.83. The spatial f...
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#1Patrick Oswald (École normale supérieure de Lyon)H-Index: 19
This paper deals with the Lehmann rotation of banded cholesteric droplets subjected to a temperature gradient when they coexist with their own isotropic liquid. I show that their angular rotation velocity increases --in absolute value-- when they are subjected to an additional AC electric field in the conducting regime. This velocity increase is correlated with a prolate distortion of the droplets and the probable presence of electrohydrodynamical toroidal circulation flows inside and outside th...
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Top fields of study
Physics
Liquid crystal
Condensed matter physics
Complex system
Soft matter
Classical mechanics