منابع مشابه
Viscosity in disordered media
The paper addresses the properties of glassforming melts in an attempt to predict the dependence of viscosity on temperature and on pressure. A review on the main viscosity models (free volume model, the Adam and Gibbs model etc.) is given. It is demonstrated that the activation energy can be expressed through the glass-transition temperature Tg. The main attention is concentrated on the jump f...
متن کاملWatersheds in disordered media
Nuno A. M. Araújo*, K. Julian Schrenk, Hans J. Herrmann and José S. Andrade Jr. 1 Departamento de Física, Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal 2 Department of Chemistry, University of Cambridge, Cambridge, UK 3 Departamento de Física, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil 4 Computational Physics, Institute fo...
متن کاملFatigue in disordered media
We obtain the Paris law of fatigue crack propagation in a disordered solid using a fuse network model where the accumulated damage in each resistor increases with time as a power law of the local current amplitude. When a resistor reaches its fatigue threshold, it burns irreversibly. Over time, this drives cracks to grow until the system is fractured in two parts. We study the relation between ...
متن کاملAnalytical and numerical investigations of spontaneous imbibition in porous media
We present semianalytical solutions for cocurrent displacements with some degree of countercurrent flow. The solution assumes a one-dimensional horizontal displacement of two immiscible incompressible fluids with arbitrary viscosities and saturation-dependent relative permeability and capillary pressures. We address the impact of the system length on the degree of countercurrent flow when there...
متن کاملShock waves in disordered media.
We experimentally investigate the interplay between spatial shock waves and the degree of disorder during nonlinear optical propagation in a thermal defocusing medium. We characterize the way the shock point is affected by the amount of disorder and scales with wave amplitude. Evidence for the existence of a phase diagram in terms of nonlinearity and amount of randomness is reported. The result...
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ژورنال
عنوان ژورنال: Advances in Physics
سال: 2004
ISSN: 0001-8732,1460-6976
DOI: 10.1080/00018730410001687363