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Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy最新文献

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Variational self-consistent estimates for viscoplastic polycrystals with highly anisotropic grains 具有高度各向异性晶粒的粘塑性多晶体的变分自洽估计
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88410-0
Michael V. Nebozhyn , Pierre Gilormini , Pedro Ponte Castañeda
{"title":"Variational self-consistent estimates for viscoplastic polycrystals with highly anisotropic grains","authors":"Michael V. Nebozhyn ,&nbsp;Pierre Gilormini ,&nbsp;Pedro Ponte Castañeda","doi":"10.1016/S1287-4620(00)88410-0","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88410-0","url":null,"abstract":"<div><p>A recently established variational procedure is used to compute self-consistent estimates for viscoplastic polycrystals with highly anisotropic ionic and HCP grains. For large values of the grain anisotropy <em>M</em>, the predictions for the macroscopic flow stress are found to scale as <em>M<sup>γ</sup></em>, where <em>γ</em> depends on the number (less than 5) of independent slip systems that are available for plastic flow, but not on the strain-rate sensitivity. The predictions of other nonlinear extensions of the self-consistent scheme are inconsistent with this scaling law, suggesting that they may be less accurate than the variational estimates proposed here.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 11-17"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88410-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759864","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: 26
Editorial pour janvier 2000 2000年1月社论
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88407-0
É. Sanchez-Palencia (Rédacteur en Chef)
{"title":"Editorial pour janvier 2000","authors":"É. Sanchez-Palencia (Rédacteur en Chef)","doi":"10.1016/S1287-4620(00)88407-0","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88407-0","url":null,"abstract":"","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Page i"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88407-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759865","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: 0
Résolution lagrangienne d'écoulements bidimensionnels turbulents 湍流二维流动的拉格朗日分辨率
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88422-7
Stéphane Etienne , Yves-Marie Scolan
{"title":"Résolution lagrangienne d'écoulements bidimensionnels turbulents","authors":"Stéphane Etienne ,&nbsp;Yves-Marie Scolan","doi":"10.1016/S1287-4620(00)88422-7","DOIUrl":"10.1016/S1287-4620(00)88422-7","url":null,"abstract":"<div><p>Turbulent two-dimensional incompressible flows are studied by means of a mixed Euler-Lagrange method. Transported properties are the vorticity ζ the turbulent kinetic energy k, and a turbulent characteristic frequency ω. This approach avoids the use of a permanent grid and the discretization of the convective terms. It is suitable for multibody configurations, particularly when wake/body interaction occurs.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 91-96"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88422-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89617862","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
Efficacité de l'estimateur d'erreur de Verfürt h pour la solution EF de l'équation de Helmholtz verfurt h误差估计器对亥姆霍兹方程EF解的有效性
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88418-5
Simona Iremie, Philippe Bouillard
{"title":"Efficacité de l'estimateur d'erreur de Verfürt h pour la solution EF de l'équation de Helmholtz","authors":"Simona Iremie,&nbsp;Philippe Bouillard","doi":"10.1016/S1287-4620(00)88418-5","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88418-5","url":null,"abstract":"<div><p>The finite element solution of Helmholtz equation is dispersive and the existent a posteriori error estimators underestimate the pollution error implied by this phenomenon. In this paper, a new type of residual estimator for the Helmholtz operator is proposed and tested on a one-dimensional model problem. The numerical results show that the error is correctly estimated but new difficulties appear in the exact evaluation of problem dependent constants.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 67-71"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88418-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759861","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: 0
Sur l'utilisation de traceurs fluorescents pour mesurer la température de gouttelettes 使用荧光示踪剂测量液滴温度
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88416-1
Pascal Lavieille, Fabrice Lemoine, Michel Lebouché
{"title":"Sur l'utilisation de traceurs fluorescents pour mesurer la température de gouttelettes","authors":"Pascal Lavieille,&nbsp;Fabrice Lemoine,&nbsp;Michel Lebouché","doi":"10.1016/S1287-4620(00)88416-1","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88416-1","url":null,"abstract":"<div><p>A measurement technique of heated droplets temperature, based on two tracers laserinduced fluorescence is presented. This method appears particularly interesting in the field of experimental studies carried out in spray combustion, where fuel is injected in the combustion chamber on a droplet form.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 55-60"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88416-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759849","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: 3
Solutions analytiques planes de l'équation de transfert radiatif en milieu semi-transparent hétérogène axisymétrique 轴对称非均质半透明介质中辐射传输方程的平面解析解
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88415-X
Philippe Ben-Abdallah , Mohamed Sakami , Vital Le Dez , Jean-Bernard Saulnier , André Charette
{"title":"Solutions analytiques planes de l'équation de transfert radiatif en milieu semi-transparent hétérogène axisymétrique","authors":"Philippe Ben-Abdallah ,&nbsp;Mohamed Sakami ,&nbsp;Vital Le Dez ,&nbsp;Jean-Bernard Saulnier ,&nbsp;André Charette","doi":"10.1016/S1287-4620(00)88415-X","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88415-X","url":null,"abstract":"<div><p>We present the two-dimensional solutions of the radiative transfer equation for any inhomogeneous rotationally symmetrical and isotropic semitransparent medium. The medium is considered non-scattering and limited by a purely specular boundary.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 47-54"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88415-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759862","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: 0
Numerical solving of incompressible Navier-Stokes equations using an original local multigrid refinement method 不可压缩Navier-Stokes方程的原始局部多网格细化方法数值求解
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88419-7
Stéphane Vincent, Jean-Paul Caltagirone
{"title":"Numerical solving of incompressible Navier-Stokes equations using an original local multigrid refinement method","authors":"Stéphane Vincent,&nbsp;Jean-Paul Caltagirone","doi":"10.1016/S1287-4620(00)88419-7","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88419-7","url":null,"abstract":"<div><p>Numerical simulation of complex flows involving unsteady structures, boundary layers or free surfaces on a unique grid is very greedy in time and CPU because a great number of calculation point is needed to ensure a satisfactory description of the different scales of the problem. An original local multigrid method, able to refine the grid at the cell scale, is proposed to solve the Navier-Stokes and energy equations. The results obtained for the natural convection in a square cavity are compared to the one of the literature for Rayleigh numbers in the range 10<sup>5</sup>–10<sup>8</sup>.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 73-80"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88419-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90126389","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: 7
Electrophorèse d'une particule allongée sous l'action d'un champ électrostatique axisymétrique 在轴对称静电场作用下细长粒子的电泳
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88414-8
Antoine Sellier
{"title":"Electrophorèse d'une particule allongée sous l'action d'un champ électrostatique axisymétrique","authors":"Antoine Sellier","doi":"10.1016/S1287-4620(00)88414-8","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88414-8","url":null,"abstract":"<div><p>We consider a slender particle of straight centre-line (the line to which it collapses as its slenderness ratio <em>ɛ</em> vanishes) and of possibly non-uniform zeta potential. The body, not necessarily of circular cross-section, is embedded in a given electric field of revolution about the centre-line. Under those assumptions, this work asymptotically approximates, with respect to <em>ɛ</em>, the electrophoretic motion of the particle.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 41-46"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88414-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90126391","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: 0
Une méthode multidomaine/ multirésolution avec application à la simulation des grandes échelles 多域/多分辨率方法在大尺度模拟中的应用
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88421-5
Patrick Quéméré, Pierre Sagaut, Vincent Couaillier
{"title":"Une méthode multidomaine/ multirésolution avec application à la simulation des grandes échelles","authors":"Patrick Quéméré,&nbsp;Pierre Sagaut,&nbsp;Vincent Couaillier","doi":"10.1016/S1287-4620(00)88421-5","DOIUrl":"10.1016/S1287-4620(00)88421-5","url":null,"abstract":"<div><p>A multidomain/multiresolution technique is developed, with application to large-eddy simulation. A general framework for the definition of the exchange of information at the interface is proposed. It relies on the definition of some interface variables, which enables the construction of the transfer operator at the interface. The method is successfully assessed on a subsonic plane channel flow.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 87-90"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88421-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77346167","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
Un nouveau modèle de la zone de contact outil copeau 一种新型的接触区域芯片工具
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88408-2
Olivier Cahuc, Didier Toulouse, Yves Couétard, Alain Gérard
{"title":"Un nouveau modèle de la zone de contact outil copeau","authors":"Olivier Cahuc,&nbsp;Didier Toulouse,&nbsp;Yves Couétard,&nbsp;Alain Gérard","doi":"10.1016/S1287-4620(00)88408-2","DOIUrl":"10.1016/S1287-4620(00)88408-2","url":null,"abstract":"<div><p>In the study of the cutting, we develop a model for the contact between ship and tool based on the notion of stress couple. We present the main hypotheses for the associated 3D analytic model and the results arising premil.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 1-4"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88408-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82917069","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
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