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Computational Aspects of Multiscale Simulationwith the Lumped Particle Framework

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Communications in Computational Physics 2012年第9期12卷 1257-1274页

作者： Omar al-Khayat hans petter Langtangen Computational Geosciences CBCSimula Research LaboratoryP.O.Box 134NO-1325 LysakerNorway Department of Informatics University of OsloP.O.Box 1080BlindernNO-0316 OsloNorway Center for Biomedical Computing Simula Research LaboratoryP.O.Box 134NO-1325 LysakerNorway

First introduced in[2],the lumped particle framework is a flexible and numerically efficient framework for the modelling of particle transport in fluid *** this paper,the framework is expanded to simulate multicomponent particle-laden fluid *** is accomplished by introducing simulation protocols tomodel particles over a wide range of length and time ***,we present a time ordering scheme and an approximate approach for accelerating the computation of evolution of different particle constituents with large differences in physical *** apply the extended framework on the temporal evolution of three particle constituents in sandladen flow,and horizontal release of spherical ***,we evaluate the numerical error of the lumped particle *** this context,we discuss the Velocity-Verlet numerical scheme,and show how to apply this to solving Newton’s equations within the *** show that the increased accuracy of the Velocity-Verlet scheme is not lost when applied to the lumped particle framework.

关键词： Multiscale modelling lumped particle model Velocity-Verlet scheme

BUSINESS ENTERPRISES AND THE ENVIRONMENTAL INFORMATION ACT IN NORWAY

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Frontiers of Law in China-Selected Publications from Chinese Universities 2017年第1期12卷 3-23页

作者： hans petter Graver University of Oslo Oslo Norway

Making market operators responsible for having and giving access to information about their impact on the environment is an important part of changing the way the economy operates in relation to environmental sustainability. To this end, the Norwegian access to environmental information act has established a right for the public to access to environmental information from private entities such as business enterprises. In this point, the Norwegian Act goes further than international rules, such as the Aarhus Convention, and also further than any other national legislation. This article presents the rules on access to information from business enterprises, and presents and discusses examples from the implementation of these rules.

关键词： Aarhus Convention access to information corporate social responsibility,environmental information responsible business

A Lumped Particle Modeling Framework for Simulating Particle Transport in Fluids

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Communications in Computational Physics 2010年第6期8卷 115-142页

作者： Omar al-Khayat Are Magnus Bruaset hans petter Langtangen Computational Geosciences CBCSimula Research LaboratoryP.O.Box 134NO-1325 LysakerNorway Department of Informatics University of OsloP.O.Box 1080BlindernNO-0316 OsloNorway Center for Biomedical Computing Simula Research LaboratoryP.O.Box 134NO-1325 LysakerNorway

This paper presents a lumped particle model for simulating a large number of *** lumped particle model is a flexible framework in modeling particle flows,embodying fundamental features that are intrinsic in particle laden flow,including advection,diffusion and *** this paper,the particles obey a simplified version of the Bassinet-Boussinesq-Oseen equation for a single spherical ***,instead of tracking the individual dynamics of each particle,a weighted spatial averaging procedure is used where the external forces are applied to a“lump”of particles,from which an average position and velocity is *** temporal evolution of the particles is computed by partitioning the lumped particle into smaller entities,which are then transported throughout the physical *** smaller entities recombine into new particle lumps at their target *** particles prone to the effects of Brownian motion or similar phenomena,a symmetric spreading of the particles is included as *** experiments show that the lumped particle model reproduces the effects of Brownian diffusion and uniform particle transport by a fluid and *** late time scale diffusive nature of particle motion is also reproduced.

关键词： Particle modeling framework particle transport lumped particle model

Particle Collisions in a Lumped Particle Model

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Communications in Computational Physics 2011年第9期10卷 823-843页

This paper presents an extension of the lumped particle model in[1]to include the effects of particle *** lumped particle model is a flexible framework for the modeling of particle laden flows,that takes into account fundamental features,including advection,diffusion and dispersion of the *** this paper,we transform a binary collision model and concepts from kinetic theory into a collision procedure for the lumped particle *** apply this new collision procedure to investigate numerically the role of particle collisions in the hindered settling *** hindered settling effect is characterized by an increase in the effective drag coefficient CD that influences each particle in the *** coefficient is given by CD=(1−φ)−nC∗D,whereφis the volume fraction of particles,C∗D is the drag coefficient for a single particle,and n≃4.67 for creeping *** obtain an approximation for CD/C∗D by calculating the effective work done by collisions,and comparing that to the work done by the drag *** our numerical experiments,we observe a minimal value of n=***,by allowing high energy dissipation,an approximation for the classical value for creeping flow,n=4.7,is *** also obtain high values for n,up to n=6.5,which is consistent with recent physical experiments on the sedimentation of sand grains.

关键词： Lumped particle model particle collision hindered settling

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挪威的法律方法教育

师大法学

师大法学 2021年第2期 267-281页

作者： hans petter Graver 刘玥奥斯陆大学华东师范大学法学院伊利诺伊大学厄巴纳——香槟分校法学院

一、论法律方法与法律技能在过去的几十年里,如何向法学生教授法律方法一直是挪威奥斯陆(Oslo)、卑尔根(Bergen)和特罗姆瑟(Troms?)三所大学法学院讨论较多的主题。[1]长期以来主要的讨论点在于,是否应该在学习的早期就向学生教授这一...

一、论法律方法与法律技能在过去的几十年里,如何向法学生教授法律方法一直是挪威奥斯陆(Oslo)、卑尔根(Bergen)和特罗姆瑟(Troms?)三所大学法学院讨论较多的主题。[1]长期以来主要的讨论点在于,是否应该在学习的早期就向学生教授这一科目以使其具备“像律师一样思考”的必要能力,或者是正相反,学生想了解和学习复杂的法律渊源理论需要先掌握一定的法律知识。近年来,对法律方法论领域实质内容的讨论也越来越多。

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AAB—01南极和北极末次冰盛期以来的冰川消失记录：过程、时间和驱动因素17．5～***时期英格兰冰盖向北海北部的二阶段冰川推进

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海洋地质 2009年第1期25卷 65-65页

作者： Atle Nygard hans petter Sejrup Haflidi Haflidason Ivar Mardal 蔡观强（译）吴峧岐（校对）卑尔根大学挪威广州海洋地质调查局区域地质调查所不详

英格兰末次冰盖规模相对较小，而且所在的海上位置紧靠北大西洋的洋流对流中心，使其成为研究末次冰消期高频气候变化和陆一海相互作用的极具吸引力的地区。然而，由于缺乏年代学和确切的冰盖前端位置，英格兰北海部分末次冰盖的古冰河... 详细信息

英格兰末次冰盖规模相对较小，而且所在的海上位置紧靠北大西洋的洋流对流中心，使其成为研究末次冰消期高频气候变化和陆一海相互作用的极具吸引力的地区。然而，由于缺乏年代学和确切的冰盖前端位置，英格兰北海部分末次冰盖的古冰河重建受到很大的制约。根据2005和2006年在该地区新获取的海底剖面数据和岩心资料，我们提供了地震地层学和年代学方面的证据，

关键词：英格兰末次冰盛期冰盖驱动因素北海冰川北极南极

Latest development status of Qcells *** NEO technology

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