Annual Review of Fluid Mechanics最新文献_第4页

Gas Microfilms in Droplet Dynamics: When Do Drops Bounce? 液滴动力学中的气体微膜:液滴何时反弹?

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-08-22 DOI: 10.1146/annurev-fluid-121021-021121

J. Sprittles

{"title":"Gas Microfilms in Droplet Dynamics: When Do Drops Bounce?","authors":"J. Sprittles","doi":"10.1146/annurev-fluid-121021-021121","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-021121","url":null,"abstract":"In the last ten years, advances in experimental techniques have enabled remarkable discoveries of how the dynamics of thin gas films can profoundly influence the behavior of liquid droplets. Drops impacting onto solids can skate on a film of air so that they bounce off solids. For drop–drop collisions, this effect, which prevents coalescence, has been long recognized. Notably, the precise physical mechanisms governing these phenomena have been a topic of intense debate, leading to a synergistic interplay of experimental, theoretical, and computational approaches. This review attempts to synthesize our knowledge of when and how drops bounce, with a focus on ( a) the unconventional microscale and nanoscale physics required to predict transitions to/from merging and ( b) the development of computational models. This naturally leads to the exploration of an array of other topics, such as the Leidenfrost effect and dynamic wetting, in which gas films also play a prominent role. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 56 is January 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":27.7,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45720858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial Dynamics Pioneer Stephen H. Davis (1939–2021) 界面动力学先驱Stephen H.Davis（1939–2021）

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-08-17 DOI: 10.1146/annurev-fluid-121621-034932

M. Miksis, G. Neitzel, P. Voorhees

引用次数: 0

Statistical Models for the Dynamics of Heavy Particles in Turbulence 湍流中重粒子动力学的统计模型

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-04-03 DOI: 10.1146/annurev-fluid-032822-014140

J. Bec, K. Gustavsson, B. Mehlig

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引用次数: 3

Gas–Particle Dynamics in High-Speed Flows 高速流动中的气体-颗粒动力学

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-03-01 DOI: 10.1146/annurev-fluid-121021-015818

J. Capecelatro, J. Wagner

引用次数: 5

Flow Computation Pioneer Irmgard Flügge-Lotz (1903–1974) 流计算先驱Irmgard flge - lotz (1903-1974)

1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-01-19 DOI: 10.1146/annurev-fluid-030822-112654

Jonathan B. Freund

引用次数: 0

Particle Rafts and Armored Droplets 粒子筏和装甲液滴

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-01-19 DOI: 10.1146/annurev-fluid-030322-015150

S. Protière

{"title":"Particle Rafts and Armored Droplets","authors":"S. Protière","doi":"10.1146/annurev-fluid-030322-015150","DOIUrl":"https://doi.org/10.1146/annurev-fluid-030322-015150","url":null,"abstract":"Particles floating at interfaces are commonly observed in nature, as well as in industrial processes. When the particles are non-Brownian particles, large deformations of the interface are created that induce long-ranged capillary interactions and lead to the formation of particle rafts with unique characteristics. In this review we discuss recent efforts in investigating particle raft formation and the role of the rafts’ own weight during dynamic clustering. Under specific conditions, these rafts can ultimately collapse and sink. When subjected to external or internal forces, the raft undergoes large deformations that test the mechanical characteristics of this interfacial composite material. It can behave as a continuous elastic sheet under compression, although its discrete nature can also trigger its fragmentation via interparticle interactions. Finally, armored droplets, drops covered by a protective shell of particles, can lose their integrity when submitted to dynamic deformations, resulting in the ejection of particles or the fracturing of the armor. Open questions to understand the properties of this material are highlighted and future research to understand the fundamental physics of particle rafts, the customization of the cluster formation, or the disassembly of this collective material is suggested.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":27.7,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41271597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Transition to Turbulence in Pipe Flow 管道流动向湍流的过渡

1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-01-19 DOI: 10.1146/annurev-fluid-120720-025957

Marc Avila, Dwight Barkley, Björn Hof

引用次数: 12

A Perspective on the State of Aerospace Computational Fluid Dynamics Technology 航空航天计算流体力学技术发展现状展望

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-01-19 DOI: 10.1146/annurev-fluid-120720-124800

M. Mani, A. J. Dorgan

引用次数: 12

Elasto-Inertial Turbulence Elasto-Inertial动荡

1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-01-19 DOI: 10.1146/annurev-fluid-032822-025933

Yves Dubief, Vincent E. Terrapon, Björn Hof

{"title":"Elasto-Inertial Turbulence","authors":"Yves Dubief, Vincent E. Terrapon, Björn Hof","doi":"10.1146/annurev-fluid-032822-025933","DOIUrl":"https://doi.org/10.1146/annurev-fluid-032822-025933","url":null,"abstract":"The dissolution of minute concentration of polymers in wall-bounded flows is well-known for its unparalleled ability to reduce turbulent friction drag. Another phenomenon, elasto-inertial turbulence (EIT), has been far less studied even though elastic instabilities have already been observed in dilute polymer solutions before the discovery of polymer drag reduction. EIT is a chaotic state driven by polymer dynamics that is observed across many orders of magnitude in Reynolds number. It involves energy transfer from small elastic scales to large flow scales. The investigation of the mechanisms of EIT offers the possibility to better understand other complex phenomena such as elastic turbulence and maximum drag reduction. In this review, we survey recent research efforts that are advancing the understanding of the dynamics of EIT. We highlight the fundamental differences between EIT and Newtonian/inertial turbulence from the perspective of experiments, numerical simulations, instabilities, and coherent structures. Finally, we discuss the possible links between EIT and elastic turbulence and polymer drag reduction, as well as the remaining challenges in unraveling the self-sustaining mechanism of EIT.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135250842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Sharp Interface Methods for Simulation and Analysis of Free Surface Flows with Singularities: Breakup and Coalescence 具有奇点的自由表面流动模拟与分析的锐界面方法:破裂与聚并

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2022-10-21 DOI: 10.1146/annurev-fluid-120720-014714

Christopher R. Anthony, Hansol Wee, Vishrut Garg, Sumeet S. Thete, Pritish M. Kamat, Brayden W. Wagoner, E. Wilkes, P. Notz, Alvin U. Chen, Ronald Suryo, Krishnaraj Sambath, J. Panditaratne, Y. Liao, O. Basaran

{"title":"Sharp Interface Methods for Simulation and Analysis of Free Surface Flows with Singularities: Breakup and Coalescence","authors":"Christopher R. Anthony, Hansol Wee, Vishrut Garg, Sumeet S. Thete, Pritish M. Kamat, Brayden W. Wagoner, E. Wilkes, P. Notz, Alvin U. Chen, Ronald Suryo, Krishnaraj Sambath, J. Panditaratne, Y. Liao, O. Basaran","doi":"10.1146/annurev-fluid-120720-014714","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-014714","url":null,"abstract":"A common feature of many free surface flows—drop/bubble breakup or coalescence and film/sheet rupture—is the occurrence of hydrodynamic singularities. Accurately computing such flows with continuum mechanical, multidimensional free surface flow algorithms is a challenging task given these problems’ multiscale nature, which necessitates capturing dynamics occurring over disparate length scales across 5–6 orders of magnitude. In drop breakup, the thinning of fluid threads that form and eventually pinch-off must be simulated until the thread's radius is about 10 nm. When two drops approach one another, the thickness of the fluid film separating them must fall below 10 nm before coalescence is said to have occurred. If the initial drop radii are 1 mm, simulations must remain faithful to the physics as thread radius or film thickness falls from 10−3 m to below 10−8 m. Here we review significant findings in interfacial flows with hydrodynamic singularities spearheaded by sharp interface algorithms. These multidimensional algorithms can achieve resolution that to date has only been possible with the use of simple 1D evolution equations. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 55 is January 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":null,"pages":null},"PeriodicalIF":27.7,"publicationDate":"2022-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47469011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6