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Cellular Automata and Lattice Gases papers — page 2

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Turbulent channel flow simulations using a coarse-grained extension of the Lattice Boltzmann method
A coarse-grained version of the Lattice Boltzmann (LB) method is developed with the intent of enhancing its geometrical flexibility so as to be able to tackle a wider class of flows of engineering…
Giorgio Amati, Sauro Succi, Roberto BenziOct 2, 1996
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Lattice kinetic theory for numerical combustion
A simple extension of the Lattice Boltzmann equation is proposed, which permits to handle reactive flow dynamics in the limit of fast chemistry at virtually no extra-cost with respect to the purely…
S. Succi, G. Bella, F. PapettiSep 20, 1996
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Lattice Boltzmann Equation: Failure or Success?
The lattice Boltzmann equation (LBE) is a microscopically-inspired method designed to solve macroscopic fluid dynamics problems. As a such, it lives at the interface between the microscopic…
Sauro SucciSep 19, 1996
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Parallel Algorithm and Dynamic Exponent for Diffusion-limited Aggregation
A parallel algorithm for ``diffusion-limited aggregation'' (DLA) is described and analyzed from the perspective of computational complexity. The dynamic exponent z of the algorithm is defined…
K. Moriarty, J. Machta, R. GreenlawSep 9, 1996
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Adaptive Mesh Refinement for Singular Current Sheets in Incompressible Magnetohydrodynamic Flows
The formation of current sheets in ideal incompressible magnetohydrodynamic flows in two dimensions is studied numerically using the technique of adaptive mesh refinement. The growth of current…
Holger Friedel, Rainer Grauer, Christiane MarlianiAug 12, 1996
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Non-Gaussian statistics in space plasma turbulence, fractal properties and pitfalls
Magnetic field fluctuations in the vicinity of the Earth's bow shock have been investigated with the aim to characterize the intermittent behaviour of strong plasma turbulence. The observed…
T. Dudok de Wit, V. V. Krasnosel'skikhJul 27, 1996
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Computer simulations of domain growth and phase separation in two-dimensional binary immiscible fluids using dissipative particle dynamics
We investigate the dynamical behavior of binary fluid systems in two dimensions using dissipative particle dynamics. We find that following a symmetric quench the domain size R(t) grows with time t…
Peter V. Coveney, Keir E. NovikJul 16, 1996
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The Computational Complexity of the Lorentz Lattice Gas
The Lorentz lattice gas is studied from the perspective of computational complexity theory. It is shown that using massive parallelism, particle trajectories can be simulated in a time that scales…
J. Machta, K. MoriartyJul 14, 1996
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Long-range correlations in non-equilibrium systems: Lattice gas automaton approach
In systems removed from equilibrium, intrinsic microscopic fluctuations become correlated over distances comparable to the characteristic macroscopic length over which the external constraint is…
Alberto Suarez, Jean Pierre Boon, Patrick GrosfilsJun 1, 1996
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Diffusion in a multi-component Lattice Boltzmann Equation model
Diffusion phenomena in a multiple component lattice Boltzmann Equation (LBE) model are discussed in detail. The mass fluxes associated with different mechanical driving forces are obtained using a…
Xiaowen Shan, Gary DoolenMay 28, 1996
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Two-Dimensional Navier-Stokes Simulation of Breaking Waves
Numerical simulations describing plunging breakers including the splash-up phenomenon are presented. The motion is governed by the classical, incompressible, two-dimensional Navier-Stokes equation.…
G. Chen, C. Kharif, S. Zaleski et al.May 23, 1996
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Estimating the Fractal Dimension, K2-entropy, and the Predictability of the Atmosphere
The series of mean daily temperature of air recorded over a period of 215 years is used for analysing the dimensionality and the predictability of the atmospheric system. The total number of data…
Ales RaidlMay 13, 1996
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Lattice-gas simulations of Domain Growth, Saturation and Self-Assembly in Immiscible Fluids and Microemulsions
We investigate the dynamical behavior of both binary fluid and ternary microemulsion systems in two dimensions using a recently introduced hydrodynamic lattice-gas model of microemulsions. We find…
Andrew N. Emerton, Peter V. Coveney, Bruce M. BoghosianMar 15, 1996
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Constrained-Realization Monte-Carlo Method for Hypothesis Testing
We compare two theoretically distinct approaches to generating artificial (or ``surrogate'') data for testing hypotheses about a given data set. The first and more straightforward approach is…
James Theiler, Dean PrichardMar 8, 1996
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State Space Reconstruction Parameters in the Analysis of Chaotic Time Series - the Role of the Time Window Length
The most common state space reconstruction method in the analysis of chaotic time series is the Method of Delays (MOD). Many techniques have been suggested to estimate the parameters of MOD, i.e. the…
Dimitris KugiumtzisFeb 29, 1996
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Integer Lattice Gases
We generalize the hydrodynamic lattice gas model to include arbitrary numbers of particles moving in each lattice direction. For this generalization we derive the equilibrium distribution function…
Bruce M. Boghosian, Jeffrey Yepez, Francis J. Alexander et al.Feb 15, 1996
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Generating high-dimensional chaotic signals by the sum
The method of generating of high-dimensional oscillations on the basis of summing of low-dimensional chaotic signals of noncoupled dynamical systems is investigated. It is shown that the correlation…
A. A. Kipchatov, L. V. KrasichkovJan 11, 1996
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Coarse-grained entropy rates for characterization of complex time series
A method for classification of complex time series using coarse-grained entropy rates (CER's) is presented. The CER's, which are computed from information-theoretic functionals --…
Milan PalusDec 13, 1995
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Lattice Gas Automata for Reactive Systems
Reactive lattice gas automata provide a microscopic approachto the dynamics of spatially-distributed reacting systems. After introducing the subject within the wider framework of lattice gas automata…
Jean Pierre Boon, David Dab, Raymond Kapral et al.Dec 12, 1995
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Investigations of a Two-Phase Fluid Model
We study an interface-capturing two-phase fluid model in which the interfacial tension is modelled as a volumetric stress. Since these stresses are obtainable from a Van der Waals-Cahn-Hilliard free…
B. T. Nadiga, S. ZaleskiDec 1, 1995
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Mutual Information as a Bayesian Measure of Independence
The problem of hypothesis testing is examined from both the historical and Bayesian points of view in the case that sampling is from an underlying joint probability distribution and the hypotheses…
David WolfNov 6, 1995
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A Lattice Boltzmann Model of Binary Fluid Mixture
We introduce a lattice Boltzmann for simulating an immiscible binary fluid mixture. Our collision rules are derived from a macroscopic thermodynamic description of the fluid in a way motivated by the…
Enzo Orlandini, Michael R. Swift, J. M. YeomansNov 3, 1995
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Parallel Algorithms on the ASTRA SIMD Machine
In view of the tremendous computing power jump of modern RISC processors the interest in parallel computing seems to be thinning out. Why use a complicated system of parallel processors, if the…
G. Odor, F. Rohrbach, G. Vesztergombi et al.Oct 4, 1995
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The developing structure of dynamical systems
In order to investigate the evolutionary process of many deterministic Dynamical systems with unfixed parameter, a set of dynamical models with parameter changing continuously and the accumulation of…
H. P. FangSep 17, 1995
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On Surrogate Data Testing for Linearity based on the Periodogram
The method of surrogate data is a tool to test whether data were generated by some class of model. Tests based on the periodogram have been proposed to decide if linear systems driven by Gaussian…
J. TimmerSep 11, 1995
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