Search Results - subject:"Transport processes"

A continuous variant for Grünwald–Letnikov fractional derivatives

Néel, Marie-Christine; Abdennadher, Ali; Solofoniaina, … - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 12, pp. 2750-2760

The names of Grünwald and Letnikov are associated with discrete convolutions of mesh h, multiplied by h−α. When h tends to zero, the result tends to a Marchaud’s derivative (of the order of α) of the function to which the convolution is applied. The weights wkα of such discrete...

Persistent link: https://www.econbiz.de/10011057495

Slowly rocking symmetric, spatially periodic Hamiltonians: The role of escape and the emergence of giant transient directed transport

Hennig, D.; Schimansky-Geier, L.; Hänggi, P. - In: The European Physical Journal B - Condensed Matter and … 62 (2008) 4, pp. 493-503

The nonintegrable Hamiltonian dynamics of particles placed in a symmetric, spatially periodic potential and subjected to a periodically varying field is explored. Such systems can exhibit a rich diversity of unusual transport features. In particular, depending on the setting of the initial phase...

Persistent link: https://www.econbiz.de/10009280567

Perturbation theory for large Stokes number particles in random velocity fields

Olla, P.; Vuolo, M. - In: The European Physical Journal B - Condensed Matter and … 65 (2008) 2, pp. 279-288

Persistent link: https://www.econbiz.de/10009280684

State-dependent diffusion in a periodic potential for a nonequilibrium open system

Chaudhuri, J. R.; Barik, D. - In: The European Physical Journal B - Condensed Matter and … 63 (2008) 1, pp. 117-126

The state dependent diffusion concerns with the Brownian motion of a particle in inhomogeneous media. Based on a system reservoir nonlinear coupling model, when the bath is modulated by an external Gaussian random noise with arbitrary decaying correlation time, we present a microscopic approach...

Persistent link: https://www.econbiz.de/10009280822

Interacting random walkers and non-equilibrium fluctuations

Agliari, E.; Casartelli, M.; Vezzani, A. - In: The European Physical Journal B - Condensed Matter and … 65 (2008) 2, pp. 257-264

Persistent link: https://www.econbiz.de/10009280956

Modeling an efficient Brownian heat engine

Asfaw, Mesfin - In: The European Physical Journal B - Condensed Matter and … 65 (2008) 1, pp. 109-116

Persistent link: https://www.econbiz.de/10009281400

Acceleration statistics of inertial particles in turbulent flow

Qureshi, N. M.; Arrieta, U.; Baudet, C.; Cartellier, A.; … - In: The European Physical Journal B - Condensed Matter and … 66 (2008) 4, pp. 531-536

Persistent link: https://www.econbiz.de/10009282411

Exploring the operation of a tiny heat engine

Asfaw, Mesfin; Bekele, Mulugeta - In: Physica A: Statistical Mechanics and its Applications 384 (2007) 2, pp. 346-358

We model a tiny heat engine as a Brownian particle that moves in a viscous medium in a sawtooth potential (with or without load) assisted by alternately placed hot and cold heat baths along its path. We find closed form expression for the steady-state current as a function of the model...

Persistent link: https://www.econbiz.de/10010873922

Transport processes: Perturbations propagation, the local time concept and experimental data for perturbations propagation in plasma

Shnaid, Isaac - In: Physica A: Statistical Mechanics and its Applications 386 (2007) 1, pp. 12-30

Classical equations for transport processes predict infinite speed of the perturbations propagation. From molecular … form. As a result of statistical analysis, for transport processes in the systems with zero or small hydrodynamic velocity … propagation, must be modified in order to describe transport processes with finite speed of the perturbations propagation. I also …

Persistent link: https://www.econbiz.de/10010589369

Statistical equilibrium in simple exchange games II. The redistribution game

Garibaldi, U.; Scalas, E.; Viarengo, P. - In: The European Physical Journal B - Condensed Matter and … 60 (2007) 2, pp. 241-246

We propose a simple stochastic exchange game mimicking taxation and redistribution. There are g agents and n coins; taxation is modeled by randomly extracting some coins; then, these coins are redistributed to agents following Polya's scheme. The individual wealth equilibrium distribution for...

Persistent link: https://www.econbiz.de/10009280407