Results 61 to 70 of about 267,847 (164)

Domain Decomposition for Heterogeneous Media [PDF]

, 2007
Elliptic problems with multiscale coefficients have been studied to a great extent recently. Preconditioners based on standard domain decomposition methods often perform poorly when the variation of the coefficients inside the subdomains is large. In this paper we study the behaviour of domain decomposition methods based on linear coarsening for such ...
Ivan G. Graham, Patrick O. Lechner
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Bounding of Flow and Transport Analysis in Heterogeneous Saturated Porous Media: A Minimum Energy Dissipation Principle for the Bounding and Scale-Up

Hydrology, 2019
We apply minimum kinetic energy principles from classic mechanics to heterogeneous porous media flow equations to derive and evaluate rotational flow components to determine bounding homogenous representations.
R. William Nelson, Gustavious P. Williams   +1 more
doaj   +1 more source

Highly-enhanced propagation of long-range kinks in heterogeneous media

Journal of High Energy Physics
We investigate a field-theoretical model that describes the interaction between kinks and antikinks and between kinks and other heterogeneous fields and impurities.
Jorge A. González, Alberto Bellorín, Luis E. Guerrero, Salvador Jiménez, Juan F. Marín   +4 more
doaj   +1 more source

Social media heterogeneity and preventive behaviours during the COVID-19 outbreak: a survey on online shopping

BMC Public Health
Background Residents’ adoption of preventive behaviours proved beneficial in preventing the large-scale transmission of the virus during the early stages of the COVID-19 outbreak.
Hu Xue, Xiaoning Li, Yuye Yang, Ying Liu, Xianhui Geng   +4 more
doaj   +1 more source

Heterogeneous Porous Media Simulation

, 2018
Fil: Boroni, Gustavo Adolfo. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Grupo de Plasmas Densos Magnetizados. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Grupo de Plasmas Densos Magnetizados; Argentina.
Dazeo, Nicolás Ignacio, Dottori, Javier Alejandro, Boroni, Gustavo Adolfo, Larrabide, Ignacio   +3 more
openaire   +1 more source

Ultrasonic wave propagation in heterogeneous media [PDF]

, 2012
The non-destructive testing of austenitic steel welds using ultrasound is of vital importance for assessing safety critical structures such as those found in the nuclear industry. The internal geometry of these welds is heterogeneous and highly scattering and this makes it difficult to detect and characterise any defects within them.
Cunningham, Laura, Mulholland, Anthony, Harvey, G., Bird, C.   +3 more
openaire   +1 more source

Diffusion in Heterogeneous Media with Stochastic Resetting and Pauses

Mathematics
Diffusion in heterogeneous environments is usually governed by unusual dynamics, exhibiting sub- or superdiffusive scaling depending on the structural complexity and memory effects.
Ervin K. Lenzi, Luciano R. da Silva, Marcelo K. Lenzi   +2 more
doaj   +1 more source

Estimation of Spatially Dependent Coefficients in Heterogeneous Media in Diffusive Heat Transfer Problems

Latin-American Journal of Computing
This article addresses the solution to the inverse problem in a one-dimensional transient partial differential equation with a source term, commonly encountered in heat transfer modeling for diffusion problems. The equation is utilized in a dimensionless
Lucas Lopes da Silva Costa, Eduardo Cunha Classe, Lucas da Silva Asth, Luiz Alberto da Silva Abreu, Diego Campos Knupp, Leonardo Tavares Stutz   +5 more
doaj  

A modified mixed domain method for modeling acoustic wave propagation in strongly heterogeneous media. [PDF]

J Acoust Soc Am, 2020
Gu J, Jing Y.
europepmc   +1 more source

Heterogeneous porous media in hydrology

Eos, Transactions American Geophysical Union, 1993
In natural geologic formations, flow and transport‐related processes are perturbed by multidimensional and anisotropic material heterogeneities of diverse sizes, shapes, and origins (bedding, layering, inclusions, fractures, grains, for example). Heterogeneity tends to disperse and mix transported quantities and may initiate new transfer mechanisms not
openaire   +1 more source