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Communications in Numerical Methods in Engineering最新文献

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A combination of implicit and adaptative upwind tools for the numerical solution of incompressible free surface flows 不可压缩自由表面流动数值解的隐式和自适应迎风工具组合
Communications in Numerical Methods in Engineering Pub Date : 2006-08-14 DOI: 10.1002/CNM.900
V. G. Ferreira, C. Oishi, F. A. Kurokawa, M. K. Kaibara, J. Cuminato, A. Castelo, N. Mangiavacchi, M. F. Tomé, S. McKee
{"title":"A combination of implicit and adaptative upwind tools for the numerical solution of incompressible free surface flows","authors":"V. G. Ferreira, C. Oishi, F. A. Kurokawa, M. K. Kaibara, J. Cuminato, A. Castelo, N. Mangiavacchi, M. F. Tomé, S. McKee","doi":"10.1002/CNM.900","DOIUrl":"https://doi.org/10.1002/CNM.900","url":null,"abstract":"This paper is concerned with the numerical solutions of time dependent two-dimensional incompressible flows. By using the primitive variables of velocity and pressure, the Navier-Stokes and mass conservation equations are solved by a semi-implicit finite difference projection method. A new bounded higher order upwind convection scheme is employed to deal with the non-linear (advective) terms. The procedure is an adaptation of the GENSMAC (J. Comput. Phys. 1994; 110:171-186) methodology for calculating confined and free surface fluid flows at both low and high Reynolds numbers. The calculations were performed by using the 2D version of the Freeflow simulation system (J. Comp. Visual. Science 2000; 2:199-210). In order to demonstrate the capabilities of the numerical method, various test cases are presented. These are the fully developed flow in a channel, the flow over a backward facing step, the die-swell problem, the broken dam flow, and an impinging jet onto a flat plate. The numerical results compare favourably with the experimental data and the analytical solutions.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"23 1","pages":"419-445"},"PeriodicalIF":0.0,"publicationDate":"2006-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.900","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51600198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Efficient placement of rigid supports using finite element models, Communications in Numerical Methods in Engineering 2006; 22:205–213 基于有限元模型的刚性支撑有效定位，工程数值方法通讯，2006;22:205 - 213
Communications in Numerical Methods in Engineering Pub Date : 2006-08-14 DOI: 10.1002/CNM.896
M. Friswell
{"title":"Efficient placement of rigid supports using finite element models, Communications in Numerical Methods in Engineering 2006; 22:205–213","authors":"M. Friswell","doi":"10.1002/CNM.896","DOIUrl":"https://doi.org/10.1002/CNM.896","url":null,"abstract":"","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"59 1","pages":"333-334"},"PeriodicalIF":0.0,"publicationDate":"2006-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.896","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51600271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Partitioned formulation of frictional contact problems using localized Lagrange multipliers 用局部拉格朗日乘子的摩擦接触问题的分区公式
Communications in Numerical Methods in Engineering Pub Date : 2005-10-06 DOI: 10.1002/CNM.821
J. A. González, K. Park, C. Felippa
{"title":"Partitioned formulation of frictional contact problems using localized Lagrange multipliers","authors":"J. A. González, K. Park, C. Felippa","doi":"10.1002/CNM.821","DOIUrl":"https://doi.org/10.1002/CNM.821","url":null,"abstract":"Interface treatment methods for the contact problem between non-matching meshes have traditionally been based on a direct coupling of the contacting solids employing a master–slave strategy or classical Lagrange multipliers. These methods tend to generate strongly coupled systems that is dependent on the discretization characteristics on each side of the contact zone. In this work a displacement frame is intercalated between the interface meshes. The frame is then discretized so that the discrete frame nodes are connected to the contacting substructures using the localized Lagrange multipliers collocated at the interface nodes. The resulting methodology alleviates the need for master–slave book-keeping and provides a partitioned formulation which preserves software modularity, facilitates non-matching mesh treatment and passes the contact patch test. Frictional contact problems are used to demonstrate the salient features of the proposed method. Copyright © 2005 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"22 1","pages":"319-333"},"PeriodicalIF":0.0,"publicationDate":"2005-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.821","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51596400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Static reanalysis of structures with added degrees of freedom 增加自由度结构的静力再分析
Communications in Numerical Methods in Engineering Pub Date : 2005-09-21 DOI: 10.1002/CNM.812
Baisheng Wu, Zhengguang Li
{"title":"Static reanalysis of structures with added degrees of freedom","authors":"Baisheng Wu, Zhengguang Li","doi":"10.1002/CNM.812","DOIUrl":"https://doi.org/10.1002/CNM.812","url":null,"abstract":"This paper deals with static reanalysis of a structure with added degrees of freedom where the nodes of the original structure form a subset of the nodes of the modified structure. A preconditioned conjugate-gradient approach is developed. The preconditioner is constructed, and the implementation of the approach involves only decomposition of the stiffness matrix corresponding to the newly added degrees of freedom. In particular, the approach can adaptively monitor the accuracy of approximate solutions. The approach is applicable to the reanalysis of the structural layout modifications for the case of addition of some nodes, deletion and addition of elements and further changes in the geometry as well as to the local mesh refinements. Numerical examples show that the condition number of the selected preconditioned matrix is largely reduced. Therefore, the fast convergence and accurate results can be achieved by the approach. Copyright © 2005 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"22 1","pages":"269-281"},"PeriodicalIF":0.0,"publicationDate":"2005-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51596523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 40
An algorithm for incorporation of frictional sliding conditions within a steady state rolling framework 一种将摩擦滑动条件纳入稳态滚动框架的算法
Communications in Numerical Methods in Engineering Pub Date : 2005-09-21 DOI: 10.1002/CNM.815
T. Laursen, I. Stanciulescu
{"title":"An algorithm for incorporation of frictional sliding conditions within a steady state rolling framework","authors":"T. Laursen, I. Stanciulescu","doi":"10.1002/CNM.815","DOIUrl":"https://doi.org/10.1002/CNM.815","url":null,"abstract":"A formulation for hyperelastic steady state rolling calculations is presented, focusing on the inclusion of frictional sliding conditions between a rolling tyre and a flat roadway. Algorithmically, it is seen that traditional return mapping algorithmic strategies for treatment of the friction are often ineffective for this problem even when well-posed frictional solutions exist; accordingly, an algorithmic approach utilizing a global stick predictor is proposed to recover solutions to the sliding contact problem. Numerical examples for adherent and sliding contact cases are presented, to demonstrate the effectiveness of the approach advocated. Copyright © 2005 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"22 1","pages":"301-318"},"PeriodicalIF":0.0,"publicationDate":"2005-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.815","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51596185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Hamiltonian-based error computations 基于哈密顿误差计算
Communications in Numerical Methods in Engineering Pub Date : 2005-09-21 DOI: 10.1002/CNM.814
Y. Kuo, K. Behdinan, W. Cleghorn
{"title":"Hamiltonian-based error computations","authors":"Y. Kuo, K. Behdinan, W. Cleghorn","doi":"10.1002/CNM.814","DOIUrl":"https://doi.org/10.1002/CNM.814","url":null,"abstract":"This paper presents two sets of the Hamiltonian for checking errors of approximated solutions. The first set can be applied to those problems having any number of independent and dependent variables. This set of the Hamiltonian can effectively indicate the errors of approximated solutions when requiring a high accuracy. The second set of the Hamiltonian has the invariant property when the Lagrangian is not an explicit function of time, even for non-conservative systems. Both sets can be formulated as error indicators to check errors of approximated solutions. Three illustrative examples demonstrate the error analyses of finite element solutions. Copyright © 2005 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"22 1","pages":"283-299"},"PeriodicalIF":0.0,"publicationDate":"2005-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.814","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51596126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Hydromagnetic flow and heat transfer of a conducting Casson fluid in a rectangular channel 矩形通道中导电卡森流体的磁流与传热
Communications in Numerical Methods in Engineering Pub Date : 2005-09-01 DOI: 10.1002/CNM.807
H. A. Attia, M. Sayed-Ahmed
{"title":"Hydromagnetic flow and heat transfer of a conducting Casson fluid in a rectangular channel","authors":"H. A. Attia, M. Sayed-Ahmed","doi":"10.1002/CNM.807","DOIUrl":"https://doi.org/10.1002/CNM.807","url":null,"abstract":"The transient hydromagnetic flow of an electrically conducting viscous incompressible non-Newtonian Casson fluid bounded by two parallel non-conducting plates is studied with heat transfer considering the Hall effect. An external uniform magnetic field is applied perpendicular to the plates and the fluid motion is subjected to a pressure gradient in the axial direction. The lower plate is stationary and the upper plate is suddenly set into motion and simultaneously suddenly isothermally heated to a temperature other than the lower plate temperature. Numerical solutions are obtained for the governing momentum and energy equations taking the Joule and viscous dissipations into consideration. The effect of the Hall term and the parameter describing the non-Newtonian behaviour on both the velocity and temperature distributions are studied. Copyright © 2005 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"22 1","pages":"251-268"},"PeriodicalIF":0.0,"publicationDate":"2005-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.807","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51595911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Obituary for John Argyris 约翰·阿吉里斯的讣告
Communications in Numerical Methods in Engineering Pub Date : 2004-09-01 DOI: 10.1002/CNM.709
I. Doltsinis
{"title":"Obituary for John Argyris","authors":"I. Doltsinis","doi":"10.1002/CNM.709","DOIUrl":"https://doi.org/10.1002/CNM.709","url":null,"abstract":"","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"20 1","pages":"665-669"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.709","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51590476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on the degeneration of quadrilateral element to triangular element 四边形元向三角形元退化的研究
Communications in Numerical Methods in Engineering Pub Date : 2004-09-01 DOI: 10.1002/CNM.704
L. Li, X.-P. Han, S.-q. Xu
{"title":"Study on the degeneration of quadrilateral element to triangular element","authors":"L. Li, X.-P. Han, S.-q. Xu","doi":"10.1002/CNM.704","DOIUrl":"https://doi.org/10.1002/CNM.704","url":null,"abstract":"In this paper, the problems involved in the process of degeneration of quadrilateral element into triangular element are thoroughly analysed. The contents include the formulation of the geometry mapping induced by collapsing one side of the quadrilateral element and the construction of the shape functions. The study focuses first on a 4-node bilinear quadrilateral (Q4) element to 3-node constant strain triangular (CST) element, and then on a 8-node serendipity (Q8) element to 6-node triangular element (T6). In the analysis, the quadrilateral element and degenerate triangular element are assumed to be enclosed by straight edges. The theoretical results show that there is another better approach to realize the degeneration, and that even for conventional approach of degeneration we can give more reasonable explanation to the unclear problems like the CST property in degenerate CST element and the necessity of the additional terms in degenerate T6 element. Copyright © 2004 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"20 1","pages":"671-679"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.704","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51590715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Strip element method for shape discrimination of strip rolling 带钢轧制形状判别的带钢单元法
Communications in Numerical Methods in Engineering Pub Date : 2004-09-01 DOI: 10.1002/CNM.701
Hongmin Liu, P. Yan, Chu Yu‐Peng, Wang Ying-rui
{"title":"Strip element method for shape discrimination of strip rolling","authors":"Hongmin Liu, P. Yan, Chu Yu‐Peng, Wang Ying-rui","doi":"10.1002/CNM.701","DOIUrl":"https://doi.org/10.1002/CNM.701","url":null,"abstract":"A new method—the strip element method for discriminating the shape or the stability of the rolled strip subjected to the residual stress is proposed. The rolled strip is divided into a number of strip elements, and the deflection function model is constructed with the third-power spline function and the sine function. Based on the minimum potential energy principle, the shape discrimination is transformed into the solution of eigenvalue. The computed examples verify the reliability and the practicality of this method. Copyright © 2004 John Wiley & Sons, Ltd.","PeriodicalId":51245,"journal":{"name":"Communications in Numerical Methods in Engineering","volume":"20 1","pages":"709-720"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/CNM.701","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51589932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
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