Results 21 to 30 of about 3,974 (207)

Impact of Pore Geometry and Water Saturation on Gas Effective Diffusion Coefficient in Soil

Applied Sciences, 2018
Gas flow in soil plays a crucial role in terrestrial ecosystems, and numerical simulation of their movement needs to know their effective diffusion coefficients.
Wulong Hu, Yao Jiang, Daoyi Chen, Yongshui Lin, Qiang Han, Yifei Cui   +5 more
doaj   +1 more source

Characterization of the Macroscopic Impact of Diverse Microscale Transport Mechanisms of Gas in Micro-Nano Pores and Fractures

Energies
The objective of this study is to construct a refined microscopic transport model that elucidates the transport mechanisms of gas flow within micro-nano pores and fractures.
Yintao Dong, Laiming Song, Fengpeng Lai, Qianhui Zhao, Chuan Lu, Guanzhong Chen, Qinwan Chong, Shuo Yang, Junjie Wang   +8 more
doaj   +1 more source

Multiscale Apparent Permeability Model of Shale Nanopores Based on Fractal Theory

Energies, 2019
Based on fractal geometry theory, the Hagen−Poiseuille law, and the Langmuir adsorption law, this paper established a mathematical model of gas flow in nano-pores of shale, and deduced a new shale apparent permeability model.
Qiang Wang, Yongquan Hu, Jinzhou Zhao, Lan Ren, Chaoneng Zhao, Jin Zhao   +5 more
doaj   +1 more source

Modified experimental method to investigate micro transport in the shale matrix for shale gas production

Frontiers in Energy Research, 2023
Matrix permeability is the primary transport property for shale gas recovery, due to the special production process of gas from matrix to wellbore. With the micro pore size of shale matrix, it is necessary to consider micro transport mechanisms for the ...
Zantong Hu, Yonghong Deng, Jingxuan Li, Xiaojun Wu, Xiaojun Wu, Jinmei Bai, Junqiang Tian   +6 more
doaj   +1 more source

The Steady State Characteristics of Multicomponent Diffusion in Micro- and Mesoporous Media for Adsorbable and Nonadsorbable Species

Membranes, 2022
The study addresses one of the fundamental issues in the mathematical modeling and quantitative process analysis of complex multicomponent diffusion in meso- and microporous materials.
Katarzyna Bizon, Dominika Boroń, Bolesław Tabiś   +2 more
doaj   +1 more source

A Modern Formulation of Knudsen Diffusion with Applications to Nanofabrication

2023 IEEE 23rd International Conference on Nanotechnology (NANO), 2023
Knudsen diffusion is a transport process characterized by a diffusivity being derived from molecule-geometry interactions instead of molecule-molecule collisions. It is a well-established theory, having been introduced in the early 20th century. Nonetheless, in its earliest days, the development of the Knudsen diffusion theory was troubled with ...
Aguinsky, Luiz Felipe, Toifl, Alexander, Rodrigues, Francio, Hössinger, Andreas, Weinbub, Josef   +4 more
openaire   +2 more sources

Study of Concrete Moisture Transfer Characteristics in the Presence of the Concrete Micro–Meso Structure Effect

Applied Sciences
Water and water transfer are the keys of the concrete durability problem; the non-uniform moisture transfer caused by the concrete micro–meso structure has a great effect on the drying shrinkage crack, transfers of inimical ions, etc. For the non-uniform
Xiaogang Zhang, Shuhua Zhang, Bofu Chen, Bin Tian, Xiaochun Lu, Bobo Xiong, Zhao Pan   +6 more
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

Exchange‐Coupled Two‐Dimensional MOFs

Advanced Functional Materials, EarlyView.
Graphene mediates ferromagnetic coupling between two‐dimensional metal‐organic frameworks and cobalt. Fe‐tetracyanobenzene develops a remanent magnetic response whose orientation follows the cobalt magnetization direction and persists up to room temperature, whereas Ni‐TCNB remains only field‐polarized.
Iulia Cojocariu, Pierluigi Gargiani, Manuel Valvidares, Frederik Schirdewahn, Matthias Muntwiler, Matteo Jugovac   +5 more
wiley   +1 more source

Analysis of gas transport behavior in organic and inorganic nanopores based on a unified apparent gas permeability model

Petroleum Science, 2019
Different from the conventional gas reservoirs, gas transport in nanoporous shales is complicated due to multiple transport mechanisms and reservoir characteristics.
Qi Zhang, Wen-Dong Wang, Yilihamu Kade, Bo-Tao Wang, Lei Xiong   +4 more
doaj   +1 more source