Search Results - subject:"Diffusion coefficient"

Generalized excluded volume and the diffusivity and viscosity of supercooled liquids and glasses over the entire fragility spectrum

Rah, Kyunil - In: Physica A: Statistical Mechanics and its Applications 378 (2007) 2, pp. 167-182

Arrehenius transport behavior upon onset of vitrification. To address this phenomenon a theory of the self-diffusion coefficient … excluded volume. The formulas arrived therefrom are shown to excellently account for the self-diffusion coefficient and …

Persistent link: https://www.econbiz.de/10010872295

Mapping from a fragile glass-forming system to a simpler one near their glass transitions

Tokuyama, Michio; Narumi, Takayuki; Kohira, Eri - In: Physica A: Statistical Mechanics and its Applications 385 (2007) 2, pp. 439-455

collapsed on a master curve given by MFT when DSL(φ)=DSL(T), where DSL is a long-time self-diffusion coefficient. We also …

Persistent link: https://www.econbiz.de/10011057179

A new set of Monte Carlo moves for lattice random-walk models of biased diffusion

Gauthier, Michel G.; Slater, Gary W. - In: Physica A: Statistical Mechanics and its Applications 355 (2005) 2, pp. 283-296

and with exact numerical methods to obtain the mean velocity and the diffusion coefficient of point-like particles in any …

Persistent link: https://www.econbiz.de/10010874666

A chemical response theory of the Toda lattice in an external mechanical perturbation

Horii, Zene - In: Physica A: Statistical Mechanics and its Applications 337 (2004) 3, pp. 398-410

In the preceding paper, using the so-called flow variable representation, we reported the formulation of the Korteweg-deVries (KdV) and the Burgers equations to express mass transports. The transport theories were constructed by pertaining to correspondence with the Toda lattices. Our present...

Persistent link: https://www.econbiz.de/10011057115

Pressure, dynamics, and structure of a simple particle system confined in a soft nanopore

Bandow, Bernhard; Hess, Siegfried; Kröger, Martin - In: Physica A: Statistical Mechanics and its Applications 337 (2004) 3, pp. 443-469

the confinement. Structures, pressure, and diffusion coefficient are found depending on both the pore's lateral aspect …

Persistent link: https://www.econbiz.de/10011063752

Escape times in fluctuating metastable potential and acceleration of diffusion in periodic fluctuating potentials

Spagnolo, Bernardo; A. Dubkov, Alexander; V. Agudov, Nikolay - In: Physica A: Statistical Mechanics and its Applications 340 (2004) 1, pp. 265-273

overdamped Brownian particle in a fast fluctuating symmetric periodic potential we obtain that the effective diffusion … coefficient depends on the mean first-passage time, as discovered for fixed periodic potential. The effective diffusion …

Persistent link: https://www.econbiz.de/10010589245

Brownian dynamics: divergence of mobility tensor

Wajnryb, E.; Szymczak, P.; Cichocki, B. - In: Physica A: Statistical Mechanics and its Applications 335 (2004) 3, pp. 339-358

divergence of this tensor is derived. It is then applied in calculations of long-time collective diffusion coefficient of hard …

Persistent link: https://www.econbiz.de/10010590274

Universal effects of collective interactions on long-time self-diffusion coefficients in hard-sphere systems

Tokuyama, Michio; Yamazaki, Hiroyuki; Terada, Yayoi - In: Physica A: Statistical Mechanics and its Applications 328 (2003) 3, pp. 367-379

We investigate how universal the collective behavior, due to the many-body interactions in polydisperse hard-sphere systems, is at higher volume fractions. We perform two types of computer simulations, a Brownian-dynamics simulation on colloidal suspensions of hard spheres, where the...

Persistent link: https://www.econbiz.de/10011059292

Stock market context of the Lévy walks with varying velocity

Kutner, Ryszard - In: Physica A: Statistical Mechanics and its Applications 314 (2002) 1, pp. 786-795

We developed the most general Lévy walks with varying velocity, shorter called the Weierstrass walks (WW) model, by which one can describe both stationary and non-stationary stochastic time series. We considered a non-Brownian random walk where the walker moves, in general, with a velocity that...

Persistent link: https://www.econbiz.de/10010873483

The surface diffusion coefficient for an arbitrarily curved fluid–fluid interface. (I). General expression

M.C. Sagis, Leonard - In: Physica A: Statistical Mechanics and its Applications 291 (2001) 1, pp. 89-102

In this paper, we develop a theory for the calculation of the surface diffusion coefficient for an arbitrarily curved … interface, without memory effects or yield stresses. We derive an expression for the surface diffusion coefficient in terms of …

Persistent link: https://www.econbiz.de/10011062765