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Thermodynamique des interfaces et mécanique des fluides最新文献

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Le feu des armes 武器之火
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2021-06-25 DOI: 10.21494/iste.op.2021.0681
R. Prud’homme
{"title":"Le feu des armes","authors":"R. Prud’homme","doi":"10.21494/iste.op.2021.0681","DOIUrl":"https://doi.org/10.21494/iste.op.2021.0681","url":null,"abstract":"On fait dans ce court article un bilan sommaire des armes a base de combustion et de leurs effets. Sont evoques les lance-flammes et l'arme thermobarique, les bombes : napalm, engins explosifs, bombes au phosphore. Puis il est question de missiles, d'armee de l'espace et de pollution due aux armes.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":" 31","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132010624","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
Notions de base sur la combustion 燃烧的基本概念
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-04-25 DOI: 10.21494/ISTE.OP.2019.0376
R. Prud’homme
{"title":"Notions de base sur la combustion","authors":"R. Prud’homme","doi":"10.21494/ISTE.OP.2019.0376","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0376","url":null,"abstract":"La decouverte du feu a contribue a l'emergence de l'humanite. C'est ensuite la maitrise scientifique de cette meme combustion qui a permis a l'homme de se propulser sur la lune ou plus modestement de faire fonctionner le mo-teur de votre voiture. Qui n'a pas ete fascine par un feu d'artifice, une simple bougie ou un feu de bois ? De nombreux phenomenes physiques et chimiques s'y produisent que cet article va vous permettre de decouvrir.2 La combustion resulte d'un ensemble de reactions chimiques qui libere de l'energie. Les differents corps chimiques qui interviennent sont essentiellement un oxydant, un reducteur et les produits de combustion. Ces corps sont en mouve-ment, diffusent les uns dans les autres et la chaleur produite par les reactions chimiques se propage. La combustion est d'abord abordee en milieu gazeux. On distingue des flammes de diffusion et des flammes de premelange. On etudie d'abord le cas laminaire, puis l'action de la turbulence sur ces flammes. Sont presentes ensuite sommairement quelques cas heterogenes tels que la combustion de plaques, de sprays et de poudres.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117252805","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
Brownian motion in strongly fluctuating liquid 强波动液体中的布朗运动
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-04-25 DOI: 10.21494/ISTE.OP.2019.0377
D. Beysens
{"title":"Brownian motion in strongly fluctuating liquid","authors":"D. Beysens","doi":"10.21494/ISTE.OP.2019.0377","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0377","url":null,"abstract":"In this paper is reported how the Brownian motion of colloids (beads) immersed in a liquid can be affected by the local properties of the fluid and how, in turn, it can alter them. Near- critical binary mixtures are known to exhibit important concentration fluctuations when nearing their liquid-liquid critical point (CP). Photon-beating spectroscopy measurements show that colloids immersed in such a critical mixture of isobutyric acid and water exhibit a slow-down of their Brownian motion due to the fluctuation-induced critical enhancement of viscosity. However, as the mixture temperature is brought close to the CP temperature, the fluctuations lifetime becomes large enough such that the fluctuations can be in turn strongly deformed by the shear flow around the colloids. Mean-field behavior, where the influence of fluctuations can be ignored, follows. Viscosity does not increase anymore and colloids motion ceases to slow down.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115974777","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
Etude de l’écoulement tridimensionnel et instationnaire dans un rotor d’une éolienne Savonius 萨伏尼乌斯风力涡轮机转子三维和稳态流动的研究
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-04-12 DOI: 10.21494/ISTE.OP.2019.0357
F. Raveloson, Delphin Tomboravo, Roger Vony
{"title":"Etude de l’écoulement tridimensionnel et instationnaire dans un rotor d’une éolienne Savonius","authors":"F. Raveloson, Delphin Tomboravo, Roger Vony","doi":"10.21494/ISTE.OP.2019.0357","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0357","url":null,"abstract":"L'objet de la presente etude est d'elaborer un code de calcul pour la resolution des equations regissant l'ecoulement des fluides dans une eolienne a axe vertical. Afin de verifier l'efficacite de notre code, nous avons fait une application sur le rotor Savonius. L'ecoulement des fluides dans une roue tournante est defini par les equations de continuite, de Navier-Stokes et de l'energie. Ces equations sont resolues numeriquement par la methode de difference finie explicite de Lax-Wendroff suivi de l'addition d'une viscosite artificielle corrigee suivant le temps. La precision spatio-temporelle de notre schema est d'ordre deux et la stabilite du calcul numerique est assuree par la condition CFL qui impose une contrainte sur le pas de temps. Les resultats sont presentes par des courbes de pression et de Mach.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125336470","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: 2
Interfaces et fluides critiques 接口和关键流体
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-02-26 DOI: 10.21494/ISTE.OP.2019.0338
R. Prud’homme
{"title":"Interfaces et fluides critiques","authors":"R. Prud’homme","doi":"10.21494/ISTE.OP.2019.0338","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0338","url":null,"abstract":"Pour les corps purs, l'interface de separation de phases liquide-vapeur disparait au point critique. Cette propriete et d'autres encore ont suscite l'interet de nombreux scientifiques. Cet article est une mise a jour du texte de la conference invitee sur les Fluides Critiques presentee a un seminaire de Saint-Gobain-Recherche Aubervilliers le 14 juin 2007. Sont presentes successivement : la thermostatique, puis la thermodynamique des fluides au voisinage du point critique ; l'effet piston, mode specifique de transmission de la chaleur ; l'expansion d'une “goutte” a la pression critique ; le comportement d'une poche de fluide supercritique plongee dans un environnement a haute temperature ; enfin l'ebullition pres du point critique. Il s'agit pour partie d'une reprise de textes emis par differents auteurs cites.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132595183","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
Some Aspects of Turbulence in Discrete Mechanics 离散力学中湍流的几个方面
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-02-05 DOI: 10.21494/ISTE.OP.2019.0328
J. Caltagirone, S. Vincent
{"title":"Some Aspects of Turbulence in Discrete Mechanics","authors":"J. Caltagirone, S. Vincent","doi":"10.21494/ISTE.OP.2019.0328","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0328","url":null,"abstract":"The discrete mechanics formalism and equations are considered in the present work in order to establish the role played by representative motion equations on the study of turbulence in fluids. In particular, a set of differences related to the turbulent pressure, the dynamics of vorticity in two spatial dimensions, the turbulent dissipation or the divergence of acceleration are discussed compared to the classical continuous media and Navier-Stokes equations. A second part is devoted to presenting on a first example, the rigid rotational motion, the differences between discrete and continuum mechanics. A last section is devoted to simulating the turbulent channel flow at turbulent Reynolds number of Reτ = 590. It is demonstrated that discrete mechanics allow to recover accurately the mean velocity profiles of reference DNS and also to provide scale laws of the whole mean velocity profile from the wall to the center of the channel.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132832248","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: 2
LES of turbulent non-isothermal two-phase flows within a multifield approach 湍流非等温两相流在多场方法中的LES
Thermodynamique des interfaces et mécanique des fluides Pub Date : 2019-01-01 DOI: 10.21494/ISTE.OP.2019.0320
S. Vincent, Solène Gouénard, S. Mimouni
{"title":"LES of turbulent non-isothermal two-phase flows within a multifield approach","authors":"S. Vincent, Solène Gouénard, S. Mimouni","doi":"10.21494/ISTE.OP.2019.0320","DOIUrl":"https://doi.org/10.21494/ISTE.OP.2019.0320","url":null,"abstract":"Safety issues in nuclear power plant involve complex turbulent bubbly flows. To predict the behavior of these flows, the two-fluid approach is often used. Nevertheless, this model has been developed for the simulation of small spherical bubbles, considered as a dispersed field. To deal with bubbles with a large range of sizes, a multifield approach based on this two-fluid model has been proposed. A special treatment, called the Large Bubble Model (LBMo), has been implemented and coupled to the dispersed model. However, only laminar and isothermal flows were considered in previous papers. Thus, here, Large Eddy Simulations (LES) are investigated to model turbulence effects. For this purpose, the two-fluid model equations are filtered to highlight the specific subgrid terms. Then, an a priori LES study using filtered Direct Numerical Simulation (DNS) results is detailed. This analysis allows classifying these terms according to their relative weight and then concentrating the modelling efforts on the predominant ones. Five different turbulence models are compared. These results are finally used to perform true LES on a turbulent two-phase flow. Moreover, in order to tackle non-isothermal flows occurring in industrial studies, a new heat transfer model is implemented and validated to deal with phase change at large interfaces using the Large Bubble Model.","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130861572","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
Quadri interfaces 表示“四”界面
Thermodynamique des interfaces et mécanique des fluides Pub Date : 1900-01-01 DOI: 10.21494/iste.op.2021.0665
R. Prud’homme
{"title":"Quadri interfaces","authors":"R. Prud’homme","doi":"10.21494/iste.op.2021.0665","DOIUrl":"https://doi.org/10.21494/iste.op.2021.0665","url":null,"abstract":"HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Quadri interfaces Roger Prud’Homme","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122886979","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
Simulation numérique d’un écoulement moyen dans un canal inter aube d’une éolienne à axe horizontal 水平轴风力涡轮机叶片间通道平均流量的数值模拟
Thermodynamique des interfaces et mécanique des fluides Pub Date : 1900-01-01 DOI: 10.21494/iste.op.2023.0997
Delphin Tomboravo, Roger Vony, F. Raveloson, Tsialefitry Aly Saandy
{"title":"Simulation numérique d’un écoulement moyen dans un canal inter aube d’une éolienne à axe horizontal","authors":"Delphin Tomboravo, Roger Vony, F. Raveloson, Tsialefitry Aly Saandy","doi":"10.21494/iste.op.2023.0997","DOIUrl":"https://doi.org/10.21494/iste.op.2023.0997","url":null,"abstract":"RÉSUMÉ . Cet article expose une méthode numérique de différences finies, permettant de calculer les variables décrivant un écoulement moyen, non visqueux et non pesant, à travers une roue mobile d’éolienne à axe horizontal, pour en déduire ses performances, en utilisant un maillage à pas irréguliers. Des schémas de discrétisations spatiales centrés à l’intérieur du domaine de calcul et décentrés vers l’intérieur pour les nœuds placés sur les frontières sont utilisés. La discrétisation temporelle utilise un schéma explicite à deux pas de temps, avec une précision de l’ordre de deux. Les calculs sont faits en deux étapes : une étape de","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121694746","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
Considérations sur le vortex de Hill 对希尔涡旋的考虑
Thermodynamique des interfaces et mécanique des fluides Pub Date : 1900-01-01 DOI: 10.21494/iste.op.2021.0747
R. Prud’homme
{"title":"Considérations sur le vortex de Hill","authors":"R. Prud’homme","doi":"10.21494/iste.op.2021.0747","DOIUrl":"https://doi.org/10.21494/iste.op.2021.0747","url":null,"abstract":"","PeriodicalId":170726,"journal":{"name":"Thermodynamique des interfaces et mécanique des fluides","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114916914","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
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