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Annual Review of Fluid Mechanics最新文献

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New Insights into Turbulent Spots 对湍流点的新见解
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-09-21 DOI: 10.1146/annurev-fluid-120720-021813
Xiaohua Wu
{"title":"New Insights into Turbulent Spots","authors":"Xiaohua Wu","doi":"10.1146/annurev-fluid-120720-021813","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-021813","url":null,"abstract":"Transitional–turbulent spots bridge the deterministic laminar state with the stochastic turbulent state and affect the transition zone length in engineering flows. Turbulent spot research over the past four decades has expanded from incompressible flat-plate boundary layer and pipe flow to hypersonic boundary layer flow, turbomachinery flow, channel flow, plane Couette flow, and a range of more complex flows. Progress has been made on the origination, composition, demarcation, growth, mutual interaction, reproduction, sustainability, and self-organization of turbulent spots. The hypothesis that transitional–turbulent spots are a basic module of the fully turbulent boundary layer has been proven through the discovery of locally generated turbulent–turbulent spots dominating the wall layer. Splitting of transitional–turbulent spots in pipe flow has been linked to a life cycle localized in the spot frontal section. This review discusses these advances and outlines future research directions. 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":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48844465","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: 4
Fluid Mechanics in France in the First Half of the Twentieth Century 20世纪上半叶法国的流体力学
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-06-30 DOI: 10.1146/annurev-fluid-120720-010041
F. Charru
{"title":"Fluid Mechanics in France in the First Half of the Twentieth Century","authors":"F. Charru","doi":"10.1146/annurev-fluid-120720-010041","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-010041","url":null,"abstract":"If one opens today a textbook on fluid mechanics, it seems that whereas French scientists of the eighteenth and nineteenth centuries are frequently mentioned, those from more recent times occur rarely; in particular, French contributions to the major breakthroughs of the first half of the twentieth century (boundary layers and turbulence) would appear quite modest. However, study of contemporary documents (PhD theses, journals, correspondence, etc.) reveals remarkable work undertaken by outstanding personalities. A key instigator of these achievements was the French Air Ministry, which, starting in 1929, and with great open-mindedness, created and generously financed four Institutes of Fluid Mechanics and five teaching centers in faculties of science. This reveals the 1930s in their true light as a fruitful decade, with achievements that explain the prominent role played by France in the creation of the International Union of Theoretical and Applied Mechanics (IUTAM) in 1946. This review recounts the story of fluid mechanics in France, with emphasis on the connection between scientific questions and social and cultural issues, in a period marked by two world wars and great strengthening of international relationships. 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":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46930722","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
Recent Developments in Theories of Inhomogeneous and Anisotropic Turbulence 非均匀和各向异性湍流理论的最新进展
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-05-11 DOI: 10.1146/annurev-fluid-120720-031006
J. Marston, S. Tobias
{"title":"Recent Developments in Theories of Inhomogeneous and Anisotropic Turbulence","authors":"J. Marston, S. Tobias","doi":"10.1146/annurev-fluid-120720-031006","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-031006","url":null,"abstract":"Understanding inhomogeneous and anisotropic fluid flows require mathematical and computational tools that are tailored to such flows and distinct from methods used to understand the canonical problem of homogeneous and isotropic turbulence. We review some recent developments in the theory of inhomogeneous and anisotropic turbulence, placing special emphasis on several kinds of quasi-linear approximations and their corresponding statistical formulations. Aspects of quasi-linear theory that have received insufficient attention in the literature are discussed, and open questions are framed. 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":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44926975","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: 14
Self-Propulsion of Chemically Active Droplets 化学活性液滴的自推进
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-04-19 DOI: 10.1146/annurev-fluid-120720-012204
S. Michelin
{"title":"Self-Propulsion of Chemically Active Droplets","authors":"S. Michelin","doi":"10.1146/annurev-fluid-120720-012204","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-012204","url":null,"abstract":"Microscopic active droplets are able to swim autonomously in viscous flows. This puzzling feature stems from solute exchanges with the surrounding fluid via surface reactions or their spontaneous solubilization and from the interfacial flows resulting from these solutes’ gradients. Contrary to asymmetric active colloids, these isotropic droplets swim spontaneously by exploiting the nonlinear coupling of solute transport with self-generated Marangoni flows; such coupling is also responsible for secondary transitions to more complex individual and collective dynamics. Thanks to their simple design and their sensitivity to physico-chemical signals, these droplets are fascinating to physicists, chemists, biologists, and fluid dynamicists alike in analyzing viscous self-propulsion and collective dynamics in active-matter systems, developing synthetic cellular models, or performing targeted biomedical or engineering applications. I review here the most recent and significant developments of this rapidly growing field, focusing on the mathematical and physical modeling of these intriguing droplets, together with their experimental design and characterization. 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":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43844153","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: 41
FLEET Velocimetry for Aerodynamics 用于空气动力学的FLEET速度计
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-01-05 DOI: 10.1146/annurev-fluid-032321-025544
P. Danehy, R. Burns, D. Reese, Jonathan E Retter, S. Kearney
{"title":"FLEET Velocimetry for Aerodynamics","authors":"P. Danehy, R. Burns, D. Reese, Jonathan E Retter, S. Kearney","doi":"10.1146/annurev-fluid-032321-025544","DOIUrl":"https://doi.org/10.1146/annurev-fluid-032321-025544","url":null,"abstract":"Long-lasting emission from femtosecond excitation of nitrogen-based flows shows promise as a useful mechanism for a molecular tagging velocimetry instrument. The technique, known as femtosecond laser electronic excitation tagging (FLEET), was invented at Princeton a decade ago and has quickly been adopted and used in a variety of high-speed ground test flow facilities. The short temporal scales offered by femtosecond amplifiers permit nonresonant multiphoton excitation, dissociation, and weak ionization of a gaseous medium near the beam's focus without the generation of a laser spark observed with nanosecond systems. Gated, intensified imaging of the resulting emission enables the tracking of tagged molecules, thereby measuring one to three components of velocity. Effects of local heating and acoustic disturbances can be mitigated with the selection of a shorter-wavelength excitation source. This review surveys the development of FLEET over the decade since its inception, as it has been implemented in several test facilities to make accurate, precise, and seedless velocimetry measurements for studying complex high-speed flows.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49496325","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: 8
The Influence of Boundaries on Gravity Currents and Thin Films: Drainage, Confinement, Convergence, and Deformation Effects 边界对重力流和薄膜的影响：排水、约束、收敛和变形效应
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2022-01-05 DOI: 10.1146/annurev-fluid-030121-025957
Z. Zheng, H. Stone
{"title":"The Influence of Boundaries on Gravity Currents and Thin Films: Drainage, Confinement, Convergence, and Deformation Effects","authors":"Z. Zheng, H. Stone","doi":"10.1146/annurev-fluid-030121-025957","DOIUrl":"https://doi.org/10.1146/annurev-fluid-030121-025957","url":null,"abstract":"Thin film flows, whether driven by gravity, surface tension, or the relaxation of elastic boundaries, occur in many natural and industrial processes. Applications span problems of oil and gas transport in channels to hydraulic fracture, subsurface propagation of pollutants, storage of supercritical CO2 in porous formations, and flow in elastic Hele–Shaw configurations and their relatives. We review the influence of boundaries on the dynamics of thin film flows, with a focus on gravity currents, including the effects of drainage into the substrate, and the role of the boundaries to confine the flow, force its convergence to a focus, or deform, and thus feedback to alter the flow. In particular, we highlight reduced-order models. In many cases, self-similar solutions can be determined and describe the behaviors in canonical problems at different timescales and length scales, including self-similar solutions of both the first and second kind. Additionally, the time transitions between different solutions are summarized. Where possible, remarks about various applications are provided.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46372961","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: 13
WITHDRAWN: Strategic evaluation of local ethics and culture in shaping entrepreneurial economic development in various businesses and its impact on finance management during COVID-19 outbreaks. 撤回：对当地道德和文化在塑造各种企业的创业经济发展方面的战略评估及其对 COVID-19 爆发期间财务管理的影响。
1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2021-12-17 DOI: 10.1016/j.matpr.2021.12.201
S Vijayalakshmi, M S Priyadarshini, Vivek Verma, Mohammed Faez Hasan, S Durga, Venkateswararao Podile
{"title":"WITHDRAWN: Strategic evaluation of local ethics and culture in shaping entrepreneurial economic development in various businesses and its impact on finance management during COVID-19 outbreaks.","authors":"S Vijayalakshmi, M S Priyadarshini, Vivek Verma, Mohammed Faez Hasan, S Durga, Venkateswararao Podile","doi":"10.1016/j.matpr.2021.12.201","DOIUrl":"10.1016/j.matpr.2021.12.201","url":null,"abstract":"<p><p>This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.</p>","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8975220/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86408170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Continuum and Molecular Dynamics Studies of the Hydrodynamics of Colloids Straddling a Fluid Interface 跨越流体界面的胶体流体动力学的连续体和分子动力学研究
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2021-11-18 DOI: 10.1146/annurev-fluid-032621-043917
C. Maldarelli, Nicole T. Donovan, Subramaniam Chembai Ganesh, Subhabrata Das, J. Koplik
{"title":"Continuum and Molecular Dynamics Studies of the Hydrodynamics of Colloids Straddling a Fluid Interface","authors":"C. Maldarelli, Nicole T. Donovan, Subramaniam Chembai Ganesh, Subhabrata Das, J. Koplik","doi":"10.1146/annurev-fluid-032621-043917","DOIUrl":"https://doi.org/10.1146/annurev-fluid-032621-043917","url":null,"abstract":"Colloid-sized particles (10 nm–10 μm in characteristic size) adsorb onto fluid interfaces, where they minimize their interfacial energy by straddling the surface, immersing themselves partly in each phase bounding the interface. The energy minimum achieved by relocation to the surface can be orders of magnitude greater than the thermal energy, effectively trapping the particles into monolayers, allowing them freedom only to translate and rotate along the surface. Particles adsorbed at interfaces are models for the understanding of the dynamics and assembly of particles in two dimensions and have broad technological applications, importantly in foam and emulsion science and in the bottom-up fabrication of new materials based on their monolayer assemblies. In this review, the hydrodynamics of the colloid motion along the surface is examined from both continuum and molecular dynamics frameworks. The interfacial energies of adsorbed particles is discussed first, followed by the hydrodynamics, starting with isolated particles followed by pairwise and multiple particle interactions. The effect of particle shape is emphasized, and the role played by the immersion depth and the surface rheology is discussed; experiments illustrating the applicability of the hydrodynamic studies are also examined. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 54 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47871774","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
Moisture in Textiles 纺织品中的水分
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2021-11-08 DOI: 10.1146/annurev-fluid-030121-034728
C. Duprat
{"title":"Moisture in Textiles","authors":"C. Duprat","doi":"10.1146/annurev-fluid-030121-034728","DOIUrl":"https://doi.org/10.1146/annurev-fluid-030121-034728","url":null,"abstract":"The interactions of textiles with moisture have been thoroughly studied in textile research, while fluid mechanists and soft matter physicists have partially investigated the underlying physics phenomena. A description of liquid morphologies in fibrous assemblies allows one to characterize the associated capillary forces and their impact on textiles, and to organize their complex moisture transport dynamics. This review gathers some of the common features and fundamental mechanisms at play in textile–liquid interactions, with selected examples ranging from knitted fabrics to nonwoven paper sheets, associated with experiments on model systems. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 54 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45898734","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: 9
Physics and Modeling of Large Flow Disturbances: Discrete Gust Encounters for Modern Air Vehicles 大气流扰动的物理和建模:现代飞行器的离散阵风遭遇
IF 27.7 1区 工程技术
Annual Review of Fluid Mechanics Pub Date : 2021-11-01 DOI: 10.1146/annurev-fluid-031621-085520
Anya R. Jones, O. Cetiner, M.J. Smith
{"title":"Physics and Modeling of Large Flow Disturbances: Discrete Gust Encounters for Modern Air Vehicles","authors":"Anya R. Jones, O. Cetiner, M.J. Smith","doi":"10.1146/annurev-fluid-031621-085520","DOIUrl":"https://doi.org/10.1146/annurev-fluid-031621-085520","url":null,"abstract":"Gusts of moderate and large magnitude induce flow separation and other complexities when they interact with the lifting surfaces of air vehicles. The presence of these nonlinear gusts are becoming ubiquitous in twenty-first-century air vehicles, where the classic potential flow–based methodologies applied in the past may no longer be valid. In this review, we define the parameter space for the presence of large-amplitude gusts and describe where and when these gusts may primarily be found. Recent research using modern experimental and computational techniques to define the limits of classical unsteady and indicial aerodynamic theories is summarized, with a focus on discrete transverse, streamwise (longitudinal), and vortex gust encounters. We propose areas where future research is needed to transition these studies of large-amplitude gust physics to real-time prediction and mitigation during flight. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 54 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50754,"journal":{"name":"Annual Review of Fluid Mechanics","volume":"1 1","pages":""},"PeriodicalIF":27.7,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41930377","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: 32
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