Results 11 to 20 of about 267,847 (164)

The diffusion of CO2-brine storage based on stochastic partial differential equations [PDF]

open access: yesE3S Web of Conferences, 2020
The migration of CO2 is stochastic in heterogeneous porous media. This paper considers the CO2 diffusion with the case of steady flow in heterogeneous porous media.
Bin Liu, Bo Wang, Zhuo Li, Yanfang Lv
doaj   +1 more source

Force-Induced Dispersion in Heterogeneous Media [PDF]

open access: yesPhysical Review Letters, 2015
The effect of a constant applied external force, induced for instance by an electric or gravitational field, on the dispersion of Brownian particles in periodic media with spatially varying diffusivity, and thus mobility, is studied. We show that external forces can greatly enhance dispersion in the direction of the applied force and also modify, to a ...
Guérin, Thomas, Dean, David S
openaire   +3 more sources

The analytical model of unsteady flow of incompressible monodisperse gas suspension with one-dimensional flow geometry

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2021
Background. One of the developing branches of modern fluid and gas mechanics is the mechanics of multiphase and multicomponent media. Experimental research of many dynamics processes of inhomogeneous media is difficult, therefore, mathematical modeling
D.A. Tukmakov
doaj   +1 more source

Larmor frequency in heterogeneous media [PDF]

open access: yesJournal of Magnetic Resonance, 2019
The Larmor frequency shift is found in porous media consisting of NMR-reporting fluid filling a connected pore within an NMR-invisible matrix for the case of fast diffusion in the fluid. The matrix material has a distinct location-independent anisotropic magnetic susceptibility tensor that induces a heterogeneous microscopic magnetic field when exposed
openaire   +4 more sources

Rectification and Non-Gaussian Diffusion in Heterogeneous Media

open access: yesEntropy, 2016
We show that when Brownian motion takes place in a heterogeneous medium, the presence of local forces and transport coefficients leads to deviations from a Gaussian probability distribution that make that the ratio between forward and backward ...
Paolo Malgaretti   +2 more
doaj   +1 more source

Comparative Evaluation of the Fast Marching Method and the Fast Evacuation Method for Heterogeneous Media

open access: yesApplied Artificial Intelligence, 2021
The evacuation problem is usually addressed by assuming homogeneous media where pedestrians move freely in the presence of several exits and obstacles.
Severino F. Galán
doaj   +1 more source

Hydrodynamics of a Granular Gas in a Heterogeneous Environment

open access: yesEntropy, 2017
We analyze the transport properties of a low density ensemble of identical macroscopic particles immersed in an active fluid. The particles are modeled as inelastic hard spheres (granular gas).
Francisco Vega Reyes, Antonio Lasanta
doaj   +1 more source

Nonlocal peridynamic method for porous media seepage simulation

open access: yesRock and Soil Mechanics, 2021
Based on the establishment of peridynamic nonlocal porous media seepage model, several kernel functions reflecting the degree of nonlocal effect are introduced to improve the calculation accuracy, and the peridynamic permeability coefficients ...
MA Peng-fei   +5 more
doaj   +1 more source

A simple P-wave polarization analysis: its application to earthquake location

open access: yesAnnals of Geophysics, 1994
We present a method for hypocentral location which takes into account all three components of ground motion and not only the vertical one, as it is usually done by standard least-square techniques applied to arrival times.
M. Gasperini   +4 more
doaj   +1 more source

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