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

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Eclatement tourbillonnaire dans une cavité rotor–stator cylindrique 在圆柱形转子-定子腔内的旋转爆裂
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-09-01 DOI: 10.1016/S1620-7742(01)01385-X
Eric Serre, Patrick Bontoux
{"title":"Eclatement tourbillonnaire dans une cavité rotor–stator cylindrique","authors":"Eric Serre,&nbsp;Patrick Bontoux","doi":"10.1016/S1620-7742(01)01385-X","DOIUrl":"10.1016/S1620-7742(01)01385-X","url":null,"abstract":"<div><p>The rotating flow inside an enclosed cylindrical rotor–stator cavity is studied. Within a certain range of governing parameters, vortex breakdown phenomenon can arise along the axis. Very recent papers exhibiting some particular three-dimensional effects, have concentrated new interest on this topic. The study is carried out by a numerical resolution of the 3D Navier–Stokes equations, based on spectral approximations. Three-dimensional behaviours of the flow and in the structure of the associated vortex breakdown are numerically exhibited for the first time in a cavity of large axial aspect ratio.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 9","pages":"Pages 671-677"},"PeriodicalIF":0.0,"publicationDate":"2001-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01385-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81294596","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
High sensitivity moiré interferometry and incremental hole-drilling method for residual stress measurement 高灵敏度干涉法和增量钻孔法测量残余应力
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01371-X
Zhu Wu, Guillaume Montay, Jian Lu
{"title":"High sensitivity moiré interferometry and incremental hole-drilling method for residual stress measurement","authors":"Zhu Wu,&nbsp;Guillaume Montay,&nbsp;Jian Lu","doi":"10.1016/S1620-7742(01)01371-X","DOIUrl":"10.1016/S1620-7742(01)01371-X","url":null,"abstract":"<div><p>The theoretical development of a combined method of moiré interferometry, Twyman–Green interferometry and incremental hole-drilling method is presented. The relationship between the three-dimensional surface displacements produced by introducing a blind hole and the corresponding residual stress is established by employing the existing theoretical solution containing a set of undetermined coefficients. The in-plane surface displacements <span><math><mtext>U</mtext><msub><mi></mi><mn>x</mn></msub></math></span> and <span><math><mtext>U</mtext><msub><mi></mi><mn>y</mn></msub></math></span> and out of plane surface displacement <span><math><mtext>U</mtext><msub><mi></mi><mn>z</mn></msub></math></span> produced by the relaxation of residual stresses are obtained from moiré interferometry and Twyman–Green interferometry respectively. The accuracy of the method and the experimental procedure to determine the signs of residual stresses are described. A typical examp1e is presented.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 585-593"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01371-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81981568","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
Mesure de la température de gouttelettes en combustion par fluorescence induite par laser à deux couleurs : résultats préliminaires et perspectives 用双色激光诱导荧光测量燃烧液滴的温度:初步结果和展望
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01361-7
Pascal Lavieille , Fabrice Lemoine , Michel Lebouché , Gérard Lavergne
{"title":"Mesure de la température de gouttelettes en combustion par fluorescence induite par laser à deux couleurs : résultats préliminaires et perspectives","authors":"Pascal Lavieille ,&nbsp;Fabrice Lemoine ,&nbsp;Michel Lebouché ,&nbsp;Gérard Lavergne","doi":"10.1016/S1620-7742(01)01361-7","DOIUrl":"10.1016/S1620-7742(01)01361-7","url":null,"abstract":"<div><p>Two color laser-induced fluorescence technique is able to measure mean temperature of flying droplets, in the evaporation regime without combustion. This paper presents preliminary results about the use of this technique in reactive media.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 557-564"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01361-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83875823","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: 10
Sur une méthode de pénalisation tensorielle pour la résolution des équations de Navier–Stokes 求解Navier - Stokes方程的张量惩罚方法
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01374-5
Jean-Paul Caltagirone, Stéphane Vincent
{"title":"Sur une méthode de pénalisation tensorielle pour la résolution des équations de Navier–Stokes","authors":"Jean-Paul Caltagirone,&nbsp;Stéphane Vincent","doi":"10.1016/S1620-7742(01)01374-5","DOIUrl":"10.1016/S1620-7742(01)01374-5","url":null,"abstract":"<div><p>An original reformulation of the viscous stress tensor is proposed for the motion equations dedicated to an incompressible fluid. Four different tensors appear in this decomposition, associated with viscosities of compression, elongation, shearing and rotation. This new model allows us to build a numerical solver of the Navier–Stokes equations based on a technique of tensorial penalization which is generalized with all the stresses acting on a flow. The processing of incompressibility and the rotation of a rigid body in a flow are described thanks to the model. Several numerical applications are proposed to illustrate the abilities of the new penalization method.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 607-613"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01374-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80907960","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: 28
On boundary effects in electrophoresis 电泳中的边界效应
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01367-8
Antoine Sellier
{"title":"On boundary effects in electrophoresis","authors":"Antoine Sellier","doi":"10.1016/S1620-7742(01)01367-8","DOIUrl":"10.1016/S1620-7742(01)01367-8","url":null,"abstract":"<div><p>Wall effects on electrophoretic motion of a non-conducting particle are investigated by resorting to a boundary integral approach. Contrary to available works in the field, our method applies to a particle of arbitrary shape and zeta potential. Morevover, it circumvents calculating the perturbation potential and the fluid flow. Enclosed numerical results emphasize that, near the plane boundary, wall–particle interactions may strongly modify the electrophoretic motion taking place for a single sphere.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 565-570"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01367-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82963035","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
Bounds on the self-consistent approximation for nonlinear media and implications for the second-order method 非线性介质自洽逼近的界及其对二阶方法的启示
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01369-1
Yohann Leroy , Pedro Ponte Castañeda
{"title":"Bounds on the self-consistent approximation for nonlinear media and implications for the second-order method","authors":"Yohann Leroy ,&nbsp;Pedro Ponte Castañeda","doi":"10.1016/S1620-7742(01)01369-1","DOIUrl":"10.1016/S1620-7742(01)01369-1","url":null,"abstract":"<div><p>It is shown in this note that the recently proposed ‘second-order’ homogenization method can violate a rigorous bound, when used together with the self-consistent approximation for the relevant ‘linear comparison composite.’ Although the second-order method is known to yield quite accurate results for small to moderate volume fractions of the phases, even for high nonlinearity and high contrast situations, it is shown here to fail near the percolation limit, where it can violate the bound for any level of nonlinearity. This suggests that the second-order method should be amenable to improvement to account for the effect of strong field fluctuations near the percolation threshold.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 571-577"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01369-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83198336","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
Effet du couplage thermomécanique sur la propagation d'un front de changement de phase 热机械耦合对相变前沿传播的影响
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01376-9
Xavier Balandraud , André Chrysochoos , Sylvain Leclercq , Robert Peyroux
{"title":"Effet du couplage thermomécanique sur la propagation d'un front de changement de phase","authors":"Xavier Balandraud ,&nbsp;André Chrysochoos ,&nbsp;Sylvain Leclercq ,&nbsp;Robert Peyroux","doi":"10.1016/S1620-7742(01)01376-9","DOIUrl":"10.1016/S1620-7742(01)01376-9","url":null,"abstract":"<div><p>Calorimetric effects related to the propagation of a phase change front in a monocrystalline shape memory alloy CuZnAl were derived from thermographic data analysis. At constant load, the displacement of the front induces a creep of the sample strongly depending on thermal exchanges with the surroundings. The main role played by the thermomechanical couplings can be pointed out by reversing the heat flux at the boundary of the sample: this leads to an inversion of the front propagation way associated with a recovery of the creep strain.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 621-626"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01376-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80413156","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: 19
Un nouveau modèle de plaque multicouche épaisse 一种新型的厚多层板
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01372-1
Jean-François Caron , Karam Sab
{"title":"Un nouveau modèle de plaque multicouche épaisse","authors":"Jean-François Caron ,&nbsp;Karam Sab","doi":"10.1016/S1620-7742(01)01372-1","DOIUrl":"10.1016/S1620-7742(01)01372-1","url":null,"abstract":"<div><p>We propose a new model for laminated plates which can handle high transverse shear effects. The assumptions of the model are stated on the 3D strains. The stress field is in exact equilibrium with prescribed forces except near free boundaries. The stress-strain law is fulfilled. An iterative scheme is used to solve the problem. A comparison with finite elements computations is performed.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 595-600"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01372-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87581115","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: 18
Bending vibrations of a rectangular poroelastic plate 矩形多孔弹性板的弯曲振动
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01375-7
Manuel Etchessahar, Sohbi Sahraoui, Bruno Brouard
{"title":"Bending vibrations of a rectangular poroelastic plate","authors":"Manuel Etchessahar,&nbsp;Sohbi Sahraoui,&nbsp;Bruno Brouard","doi":"10.1016/S1620-7742(01)01375-7","DOIUrl":"10.1016/S1620-7742(01)01375-7","url":null,"abstract":"<div><p>This paper presents the equations of motion of an air saturated rectangular porous plate. The model is based on a mixed displacement–pressure formulation of the Biot–Allard theory [1]. We obtain a system of equations which describe the coupling beetween the solid and fluid phases of the plate. This system is solved by applying the Galerkin method.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 615-620"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01375-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75575565","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: 25
Hystérésis et réduction de sons auto-entretenus commandées par effet Coanda 由Coanda效果控制的延迟和自维持声音减少
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics Pub Date : 2001-08-01 DOI: 10.1016/S1620-7742(01)01370-8
Sébastien Guérin , Cyrille Allery , Anas Sakout
{"title":"Hystérésis et réduction de sons auto-entretenus commandées par effet Coanda","authors":"Sébastien Guérin ,&nbsp;Cyrille Allery ,&nbsp;Anas Sakout","doi":"10.1016/S1620-7742(01)01370-8","DOIUrl":"10.1016/S1620-7742(01)01370-8","url":null,"abstract":"<div><p>An air flow crossing two baffles in tandem inside a duct, generates strong self-sustained tones. Four radial slots created on the upstream baffle, leads to a large hysteresis loop of the sound pressure level when velocity varies, the second branch of which corresponds with a reduction of the self-sustained tones. Measurements of velocity show that a Coanda effect happens on the jets issued from the slots, which induces this flow behaviour.</p></div>","PeriodicalId":100302,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics","volume":"329 8","pages":"Pages 579-584"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1620-7742(01)01370-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76949852","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
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