Physical Review E (Computational physics)

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Recently published articles in Phys. Rev. E in the Table of Content section "Computational physics"
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Spectral collocation method for collisional power absorption in radially inhomogeneous helicon plasmas

Mon, 03/18/2019 - 10:00

Author(s): Suwon Cho

A spectral collocation method using Chebyshev polynomials is applied to compute the electromagnetic fields and the collisional power absorption in radially inhomogeneous helicon plasmas. The governing equation has a singularity at the cylindrical axis, which has been resolved by imposing the appropr...

[Phys. Rev. E 99, 033303] Published Mon Mar 18, 2019

Electrospray molecular dynamics simulations using an octree-based Coulomb interaction method

Mon, 03/11/2019 - 10:00

Author(s): Neil A. Mehta and Deborah A. Levin

A new octree-based Coulomb interaction model is developed to model the electrospray of ionic liquids (ILs) in molecular dynamics. Using an octree-based method, Coulomb interactions are categorized as intra- and interleaf Coulomb interactions based on a criterion related to the Bjerrum length of the ...

[Phys. Rev. E 99, 033302] Published Mon Mar 11, 2019

Comparison of the lattice-Boltzmann model with the finite-difference time-domain method for electrodynamics

Fri, 03/08/2019 - 10:00

Author(s): A. Hauser and J. L. Verhey

A three-dimensional lattice-Boltzmann model (LBM) for the simulation of the Maxwell equations is presented. The inclusion of media follows an extension of a special limit described in the literature which is applicable to this LBM and does not harm the stability of simulations. The focus of the pres...

[Phys. Rev. E 99, 033301] Published Fri Mar 08, 2019

Bypassing sluggishness: SWAP algorithm and glassiness in high dimensions

Mon, 03/04/2019 - 10:00

Author(s): Ludovic Berthier, Patrick Charbonneau, and Joyjit Kundu

The recent implementation of a swap Monte Carlo algorithm (SWAP) for polydisperse glass forming mixtures bypasses computational sluggishness and closes the gap between experimental and simulation timescales in physical dimensions d=2 and 3. Here, we consider suitably optimized systems in d=2,3,⋯,8 t...

[Phys. Rev. E 99, 031301(R)] Published Mon Mar 04, 2019

Simulation of fingering behavior in smoldering combustion using a cellular automaton

Mon, 02/25/2019 - 10:00

Author(s): Nieves Fernandez-Anez, Kim Christensen, Vidar Frette, and Guillermo Rein

Smoldering is the slow, low-temperature, flameless burning of porous fuels and the most persistent type of combustion phenomena. It is a complex physical process that is not yet completely understood, but it is known that it is driven by heat transfer, mass transfer, and fuel chemistry. A specific c...

[Phys. Rev. E 99, 023314] Published Mon Feb 25, 2019

Maxwell-Stefan-theory-based lattice Boltzmann model for diffusion in multicomponent mixtures

Tue, 02/19/2019 - 10:00

Author(s): Zhenhua Chai, Xiuya Guo, Lei Wang, and Baochang Shi

The phenomena of diffusion in multicomponent (more than two components) mixtures are universal in both science and engineering, and from the mathematical point of view, they are usually described by the Maxwell-Stefan (MS)-theory-based diffusion equations where the molar average velocity is assumed ...

[Phys. Rev. E 99, 023312] Published Tue Feb 19, 2019

Variational schemes and geometric simulations for a hydrodynamic-electrodynamic model of surface plasmon polaritons

Tue, 02/19/2019 - 10:00

Author(s): Qiang Chen, Lifei Geng, Xiang Chen, Xiaojun Hao, Chuanchuan Wang, and Xiaoyang Wang

A class of variational schemes for the hydrodynamic-electrodynamic model of lossless free-electron gas in a quasineutral background is developed for high-quality simulations of surface plasmon polaritons. The Lagrangian density of lossless free-electron gas with a self-consistent electromagnetic fie...

[Phys. Rev. E 99, 023313] Published Tue Feb 19, 2019

Network inference in stochastic systems from neurons to currencies: Improved performance at small sample size

Fri, 02/15/2019 - 10:00

Author(s): Danh-Tai Hoang, Juyong Song, Vipul Periwal, and Junghyo Jo

The fundamental problem in modeling complex phenomena such as human perception using probabilistic methods is that of deducing a stochastic model of interactions between the constituents of a system from observed configurations. Even in this era of big data, the complexity of the systems being model...

[Phys. Rev. E 99, 023311] Published Fri Feb 15, 2019

Efficient immersed-boundary lattice Boltzmann scheme for fluid-structure interaction problems involving large solid deformation

Thu, 02/14/2019 - 10:00

Author(s): Yunan Cai, Shuangqiang Wang, Jianhua Lu, Sheng Li, and Guiyong Zhang

A hybrid numerical method which couples the immersed-boundary lattice Boltzmann method with the smoothed point interpolation method (S-PIM) is presented in this paper for the fluid-structure interaction problems involving large solid deformation. In the method, the lattice Boltzmann method is adopte...

[Phys. Rev. E 99, 023310] Published Thu Feb 14, 2019

Finite-size scaling for a first-order transition where a continuous symmetry is broken: The spin-flop transition in the three-dimensional $XXZ$ Heisenberg antiferromagnet

Wed, 02/13/2019 - 10:00

Author(s): Jiahao Xu, Shan-Ho Tsai, D. P. Landau, and K. Binder

Finite-size scaling for a first-order phase transition where a continuous symmetry is broken is developed using an approximation of Gaussian probability distributions with a phenomenological “degeneracy” factor included. Predictions are compared with data from Monte Carlo simulations of the three-di...

[Phys. Rev. E 99, 023309] Published Wed Feb 13, 2019

Angular-momentum conservation in discretization of the Navier-Stokes equation for viscous fluids

Mon, 02/11/2019 - 10:00

Author(s): Hiroshi Noguchi

Although the Navier-Stokes equation (NSE) is derived under angular-momentum conservation (AMC), numerical simulation methods often lack it. Here we reveal that AMC violations result from implementation of the degenerated viscous terms of NSE. To maintain AMC, these degenerated terms must be separate...

[Phys. Rev. E 99, 023307] Published Mon Feb 11, 2019

Lattice Boltzmann simulation of free surface flow impact on a structure

Mon, 02/11/2019 - 10:00

Author(s): E. Dinesh Kumar, S. A. Sannasiraj, and V. Sundar

Liquid impact on a rigid wall is a common feature in the context of marine structures, as most of them are exposed continuously to breaking waves. In the present paper, a comparison and analysis of the impact load estimates obtained from free surface lattice Boltzmann (LB) simulation with the experi...

[Phys. Rev. E 99, 023308] Published Mon Feb 11, 2019

Theoretical and numerical analysis of the lattice kinetic scheme for complex-flow simulations

Fri, 02/08/2019 - 10:00

Author(s): S. A. Hosseini, N. Darabiha, and D. Thévenin

The lattice kinetic scheme (LKS) is a modified version of the classical single relaxation time lattice Boltzmann method. Although used for many applications, especially when large variations in viscosity are involved, a thorough analysis of the scheme has not been provided yet. In the context of thi...

[Phys. Rev. E 99, 023305] Published Fri Feb 08, 2019

Custom flow in overdamped Brownian dynamics

Fri, 02/08/2019 - 10:00

Author(s): Daniel de las Heras, Johannes Renner, and Matthias Schmidt

When an external field drives a colloidal system out of equilibrium, the ensuing colloidal response can be very complex, and obtaining a detailed physical understanding often requires case-by-case considerations. To facilitate systematic analysis, here we present a general iterative scheme for the d...

[Phys. Rev. E 99, 023306] Published Fri Feb 08, 2019

Interpretable machine learning for inferring the phase boundaries in a nonequilibrium system

Wed, 02/06/2019 - 10:00

Author(s): C. Casert, T. Vieijra, J. Nys, and J. Ryckebusch

Still under debate is the question of whether machine learning is capable of going beyond black-box modeling for complex physical systems. We investigate the generalizing and interpretability properties of learning algorithms. To this end, we use supervised and unsupervised learning to infer the pha...

[Phys. Rev. E 99, 023304] Published Wed Feb 06, 2019

Strategy for solving difficulties in spin-glass simulations

Mon, 02/04/2019 - 10:00

Author(s): Tota Nakamura

A spin-glass transition has been investigated for a long time but we have not reached a conclusion yet due to difficulties in the simulation studies. They are slow dynamics, strong finite-size effects, and sample-to-sample dependencies. We found that a size of the spin-glass order reaches a lattice ...

[Phys. Rev. E 99, 023301] Published Mon Feb 04, 2019

Hybrid Allen-Cahn-based lattice Boltzmann model for incompressible two-phase flows: The reduction of numerical dispersion

Mon, 02/04/2019 - 10:00

Author(s): Yang Hu, Decai Li, Licong Jin, Xiaodong Niu, and Shi Shu

In this work a phase field-lattice Boltzmann model for incompressible two-phase flows is presented. In this model, the interface tracking equation is a linear combination of the local and nonlocal Allen-Cahn equations. We also propose a multiple-relaxation-time lattice Boltzmann model for solving th...

[Phys. Rev. E 99, 023302] Published Mon Feb 04, 2019

Lattice Boltzmann model with self-tuning equation of state for multiphase flows

Mon, 02/04/2019 - 10:00

Author(s): Rongzong Huang, Huiying Wu, and Nikolaus A. Adams

A lattice Boltzmann (LB) model for multiphase flows is developed that complies with the thermodynamic foundations of kinetic theory. By directly devising the collision term for the LB equation at the discrete level, a self-tuning equation of state is achieved, which can be interpreted as the incorpo...

[Phys. Rev. E 99, 023303] Published Mon Feb 04, 2019

<i>Ab initio</i> computational analysis of spectral properties of dielectric spheroidal resonators interacting with a subwavelength nanoparticle

Tue, 01/22/2019 - 10:00

Author(s): Vladimir Shuvayev and Lev Deych

An efficient numerical method for determining the spectral characteristics and spatial distribution of the field of a spheroidal whispering-gallery-mode (WGM) resonator interacting with a dielectric nanoparticle is presented. The developed approach is based on a combination of T-matrix formalism app...

[Phys. Rev. E 99, 013310] Published Tue Jan 22, 2019

Estimating physical properties from liquid crystal textures via machine learning and complexity-entropy methods

Tue, 01/22/2019 - 10:00

Author(s): H. Y. D. Sigaki, R. F. de Souza, R. T. de Souza, R. S. Zola, and H. V. Ribeiro

Imaging techniques are essential tools for inquiring a number of properties from different materials. Liquid crystals are often investigated via optical and image processing methods. In spite of that, considerably less attention has been paid to the problem of extracting physical properties of liqui...

[Phys. Rev. E 99, 013311] Published Tue Jan 22, 2019

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