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Fluctuating hydrodynamic methods for fluid-structure interactions in confined channel geometries

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Applied Mathematics and Mechanics(English Edition) 2018年第1期39卷 125-152页

作者： Y. WANG H. LEI p.j. ATZBERGER Department of Mathematics University of California Santa Barbara Santa Barbara CA 93106 U. S. A. pacific Northwestern National Laboratories Richland WA 99354 U. S. A.

We develop computational teractions subject to thermal fluctuations geometry. The methods take into account methods for the study of fluid-structure in- when confined within channels with slit-like the hydrodynamic coupling and diffusivity of microstructures when influenced by their proximity to no-slip walls. We develop stochas- tic numerical methods subject to no-slip boundary conditions using a staggered finite volume discretization. We introduce techniques for discretizing stochastic systems in a manner that ensures results consistent with statistical mechanics. We show how an exact fluctuation-dissipation condition can be used for this purpose to discretize the stochastic driving fields and combined with an exact projection method to enforce incompressibil- ity. We demonstrate our computational methods by investigating how the proximity of ellipsoidal colloids to the channel wall affects their active hydrodynamic responses and passive diffusivity. We also study for a large number of interacting particles collective drift-diffusion dynamics and associated correlation h/actions. We expect the introduced stochastic computational methods to be broadly applicable to applications in which con- finement effects play an important role in the dynamics of microstructures subject to hydrodynamic coupling and thermal fluctuations.

关键词： fluctuating Eulerian-Lagrangian method hydrodynamics immersed (SELM) ellipsoidal colloid boundary method stochastic mobility nanochannel

Si-SiO_2 interface passivation by plasma NH_3 and atomic H

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Rare Metals 2006年第z1期25卷 146-149页

作者： WEBER K.j. jAYApRASAD A. SMITH p.j. BLAKERS A. Centre for Sustainable Energy Systems Faculty of Engineering and Information Technology North Road the Australian National University Canberra ACT 0200 Australia Department of physics Faculty of Sciences University of Konstanz Germany Department of Chemistry The Australian National University Canberra ACT 0200 Australia 0200 Australia

plasma ammonia treatment at 400 ℃ leads to de-passivation of a fully hydrogenated Si-SiO2 interface, and to passivation of a fully de-hydrogenated Si-SiO2 interface. plasma NH3 exposure causes irreversible Si surface damage and degradation of thermal stability. Atomic hydrogen exposure, although it results in similar effects on the Si-SiO2 interface, does not introduce additional defects or a decrease of the Si surface thermal stability. The difference between plasma NH3 exposure and atomic H exposure is speculated to be due to either the nitridation of Si-SiO2 interface or radiation damage resulting from plasma NH3 exposure. EpR measurements indicate changes of the paramagnetic defect properties and an increase in the paramagnetic defect density generated by plasma NH3 exposure.

关键词： plasma NH3 atomic H SiO2 EpR

Comments on ‘Enhanced piezoresistivity in Ni-silicone rubber composites’

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Chinese physics B 2010年第1期19卷 431-432页

作者： D.Bloor A.Graham p.j. Laughlin D.Lussey Department of physics Durham University peratech Ltd Old Repeater StationBrompton-on-SwaleDL10 7JHUK

This paper describes the accepted meaning of the term ＇negative resistance＇ and its use in the literature, and discusses the features in the previously published data on QTC^TM （market name of a metal-polymer composite） that show that the non-linear, hysteretic current voltage characteristics are not caused by joule heating. The benefit of the high metal filler loading in QTC^TM and other unique features of this composite are reviewed.

关键词： I V characteristics quantum tunnelling oiezoresitivity

A linear regression model (LRM) for groundwater chemistry in and around the Vaniyambadi industrial area, Tamil Nadu, India

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Chinese journal Of Geochemistry 2013年第1期32卷 19-26页

作者： Sajil Kumar p.j. Davis Delson p. Vernon j.G. james E.j. Brandenburg Technical University Cottbus-03046 Germany ITALCONSULT Riyadh-11421 Saudi Arabia Budapest University of Technology and Economics (BME) Budapest-Pf. 91 H-152 Hungary Water Institute Karunya UniversityCoimbatore-641114 India

A linear regression model in conjunction with cluster analysis was applied to the groundwater quality parameters for the Vaniyambadi industrial area, Tamil Nadu, India. These physico-chemical parameters were collected from 25 wells by intensive groundwater sampling conducted during january 2010. All the major ions, pH and electrical conductivity were analyzed. The abundances of cations were in the order of Na pectively. This was in agreement with the water types, Na-Cl and Na-Ca-HCO3, determined by the piper plot. High concentrations of the ions Na, Cl and SO4 were recorded near the tanneries that operate within the study area. While the elevated concentrations of HCO3 and F were observed away from the tanneries. This peculiar hydrochemical behaviour suggests that the chemistry of water is predominantly influenced by tannery effluents and weathering of silicate minerals. Results of the linear regression model yielded 11 regression equations for the 5 most correlated parameters. A dendrogram from the cluster analysis showed 2 major clusters representing the influence of tanneries and geological formations in the study area, which confirmed the results of major ion chemistry.

关键词：线性回归模型地下水化学工业区印度 LRM 聚类分析物理化学参数研究区域

Analysis of mesoscale effects in high-shear granulation through a computational fluid dynamics-population balance coupled compartment model

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particuology 2018年第1期16卷 1-12页

作者： p.j. Abrahamsson p. Kvist G. Reynolds X. Yu I. Niklasson Bjorn M.j. Hounslow A. Rasmuson Department of Chemical and Biological Engineering Chalmers University of Technology SE-412 96 Gothenburg Sweden pharmaceutical Development AstraZeneca Macclesfield SK10 2NA UK European Bioenergy Research Institute (EBRI) School of Engineering and Applied Science Aston University Birmingham B4 7ET UK AstraZeneca pharmaceutical and Analytical R&D Molndal SE-431 83 Moldnal Sweden Department of Chemical and Biological Engineering University of Sheffield Sheffield SI 3JD UK

There is a need for mesoscale resolution and coupling between flow-field information and the evolution of particle properties in high-shear granulation. We have developed a modelling framework that com- partmentalizes the high-shear granulation process based on relevant process parameters in time and space. The model comprises a coupled-flow-field and population-balance solver and is used to resolve and analyze the effects of mesoscales on the evolution of particle properties. A Diosna high-shear mixer was modelled with microcrystalline cellulose powder as the granulation material. An analysis of the flow-field solution and compartmentalization allows for a resolution of the stress and collision peak at the impeller blades. Different compartmentalizations showed the importance of resolving the impeller region, for aggregating systems and systems with breakage. An independent study investigated the time evolution of the flow field by changing the particle properties in three discrete steps that represent pow- der mixing, the initial granulation stage mixing and the late stage granular mixing. The results of the temporal resolution study show clear changes in collision behavior, especially from powder to granular mixing, which indicates the importance of resolving mesoscale phenomena in time and space.

关键词： High-shear wet granulation population-balance model Compartment model Computational fluid dynamics

Biopsychology / 6th ed. 6th ed.

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2006年

作者： john p.j. pinel.

来源：畅想之星图书光盘版（南... 评论

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无粘性土堤的溃堤模型

长江科学院院报 2003年第3期20卷 35-38页

作者： p.j. Visser 朱勇辉 Faculty of Civil Engineering and Geosciences Delft University of Technology 河海大学水电学院江苏南京210098

以实验室及现场模型试验中观察到的溃堤机理为基础,开发了一个无粘性土(沙)堤的溃堤模型。模型用现场试验的数据校准,又用实验室试验的数据进行验证,计算与观测值间的拟合结果令人满意。模型还对一个溃堤实例进行了模拟,计算结果与目测... 详细信息

以实验室及现场模型试验中观察到的溃堤机理为基础,开发了一个无粘性土(沙)堤的溃堤模型。模型用现场试验的数据校准,又用实验室试验的数据进行验证,计算与观测值间的拟合结果令人满意。模型还对一个溃堤实例进行了模拟,计算结果与目测报告基本一致。

关键词：无粘性土堤溃堤模拟馈堤模型实验室

Field Relationships,Geochemistry,Zircon Ages and Evolution of a Late Archaean to palaeoproterozoic Lower Crustal Section in the Hengshan Terrain of Northern China

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 605-632页

作者： A. KRONER S.A. WILDE p.j. O＇BRIEN LI jianghai C.W. pASSCHIER N.p. WALTE LIU Dunyi Institut fiir Geowissenschafien Universitat Mainz D-55099 Mainz Germany School of Applied Geology Curtin University of Technology GPO Box U1987 Perth WA 6845 Australia Institut fiir Geowissenschafien Universitat Potsdam Postfach 601553 D-01553 Potsdam Germany Department of Geology Peking University Beijing 109009 China Chinese Academy of Geological Sciences 26 Baiwanzhuang Road Beijing 100037 China

The Hengshan complex forms part of the central zone of the North China Craton and consists predominantly of ductilely-deformed late Archaean to palaeoproterozoic high-grade, partly migmatitic, granitoid orthogneisses, intruded by mafic dykes of gabbroic composition. Many highly strained rocks were previously misinterpreted as supracrustal sequences and represent mylonitized granitoids and sheared dykes. Our single zircon dating documents magmatic granitoid emplacement ages between 2.52 Ga and 2.48 Ga, with rare occurrences of 2.7 Ga gneisses, possibly reflecting an older basement. A few granitic gneisses have emplacement ages between 2.35 and 2.1 Ga and show the same structural features as the older rocks, indicating that the main deformation occurred after -2.1 Ga. Intrusion of gabbroic dykes occurred at -1920 Ma, and all Hengshan rocks underwent granulite-facies metamorphism at 1.88-1.85 Ga, followed by retrogression, sheafing and uplift. We interpret the Hengshan and adjacent Fuping granitoid gneisses as the lower, plutonic, part of a late Archaean to early palaeoproterozoic japan-type magmatic arc, with the upper, volcanic part represented by the nearby Wutai complex. Components of this arc may have evolved at a continental margin as indicated by the 2.7 Ga zircons. Major deformation and Hp metamorphism occurred in the late palaeoproterozoic during the Luliang orogeny when the Eastern and Western blocks of the North China Craton collided to form the Trans-North China orogen. Shear zones in the Hengshan are interpreted as major lower crustal discontinuities post-dating the peak of Hp metamorphism, and we suggest that they formed during orogenic collapse and uplift of the Hengshan complex in the late palaeoproterozoic （〈1.85 Ga）.

关键词： Archaean to palaeoproterozoic geology zircon age Hengshan terrain North China Craton

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转型期中国的环境与现代化

国外理论动态 2006年第11期 20-25页

作者：阿瑟.p.j.莫尔庞娟中共中央编译局

一、导言西方(尤其是欧洲)工业化国家的环保制度化已经成为社会科学家进行'生态现代化'研究的目标.生态现代化就是建构现代制度,以符合环保的利益、视角和原则.

关键词：生态现代化理论中国当代环境政策转型期公民社会新兴工业化政治现代化国际一体化