Sub-grid modelling for a diffusive lattice gas

Modelling Dynamical Geometry with Lattice Gas Automata

Conventional lattice gas automata consist of particles moving discretely on a xed lattice. While such models have been quite successful for a variety of uid ow problems, there are other systems, e.g., ow in a exible membrane or chemical self-assembly, in which the geometry is dynamical and coupled to the particle ow. Systems of this type seem to call for lattice gas models with dynamical geomet...

A Grid-Enabled Lattice-Boltzmann-Based Modelling System

Lattice-Boltzmann (LB) methods are a well-known technique in the context of computational fluid dynamics. By nature, they can easily be parallelized but their adaptation to the Grid environment is not trivial due to hardware heterogeneity (CPU, memory. . . ) in a Grid. A load balancing method to dynamically handle the differences in terms of CPU number and power among the machines of a Grid is ...

Crossover in the power spectrum of a driven diffusive lattice-gas model.

Inequivalence of dynamical ensembles in a generalized driven diffusive lattice gas

We generalize the driven diffusive lattice gas model by using a combination of Kawasaki and Glauber dynamics. We find via Monte Carlo simulations and perturbation studies that the simplest possible generalization of the equivalence of the canonical and grand-canonical ensembles, which holds in equilibrium, does not apply for this class of nonequilibrium systems.

Effect of negative differential conductivity in a driven diffusive lattice gas.

A model of hopping conductivity is proposed that takes into account the nonlinear dependence of the mobility of the charge carriers on an externally applied field. The latter is known to be the main origin of the creation of high-field domains in n-type polar semiconductors and is responsible there for the current oscillations observed in the so-called Gunn effect. In this paper we study the ef...