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

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-03 DOI: 10.1146/annurev-fluid-120720-011833

Silvana S.S. Cardoso, Julyan H.E. Cartwright

引用次数: 0

The Fluid Mechanics of Female Reproduction: A Review of the Biofluid Mechanics of Pregnancy and Delivery 女性生殖的流体力学:妊娠和分娩的生物流体力学综述

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-09-27 DOI: 10.1146/annurev-fluid-121021-033738

Megan C. Leftwich, Alexa C. Baumer

{"title":"The Fluid Mechanics of Female Reproduction: A Review of the Biofluid Mechanics of Pregnancy and Delivery","authors":"Megan C. Leftwich, Alexa C. Baumer","doi":"10.1146/annurev-fluid-121021-033738","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-033738","url":null,"abstract":"Reproductive biomechanics, a broad and developing field, contains fluid mechanics problems at every stage. In particular, the human female reproductive system is a complex and dynamic fluid-structure system. Until recently, the majority of this research focused on the early moments of reproduction—namely, the transport phenomena that dominate fertilization and implantation. However, in the past two decades, fluid mechanics has begun to be used in investigations of all aspects surrounding pregnancy, labor, and delivery. In this review, we discuss human reproduction starting with the nonpregnant uterus through implantation, delivery, and lactation and breastfeeding. We cover physiologic changes from the transformation of the uterus and the cervical remodeling process to the development of the placenta and the beginning of lactation. We examine the role of reproductive fluids such as amniotic fluid and vernix caseosa, and how force is transferred during labor.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":"2 10","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49697176","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

Vortices and Forces in Biological Flight: Insects, Birds, and Bats 生物飞行中的涡旋和力:昆虫、鸟类和蝙蝠

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-09-22 DOI: 10.1146/annurev-fluid-120821-032304

Hao Liu, Shizhao Wang, Tianshu Liu

{"title":"Vortices and Forces in Biological Flight: Insects, Birds, and Bats","authors":"Hao Liu, Shizhao Wang, Tianshu Liu","doi":"10.1146/annurev-fluid-120821-032304","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120821-032304","url":null,"abstract":"Insects, birds, and bats that power and control flight by flapping their wings perform excellent flight stability and maneuverability by rapidly and continuously varying their wing motions. This article provides an overview of the state of the art of vortex-dominated, unsteady flapping aerodynamics from the viewpoint of diversity and uniformity associated with dominant vortices, particularly of the relevant physical aspects of the flight of insects and vertebrates in the low- and intermediate-Reynolds-number ( Re) regime of 100 to 106. After briefly describing wing morphology and kinematics, we discuss the main vortices generated by flapping wings and the aerodynamic forces associated with these structures, focusing on leading-edge vortices (LEVs), wake vortices, and vortices generated by wing motions over a broad Re range. The LEVs are intensified by dynamic wing morphing in bird and bat flight, producing a significantly elevated vortex lift. The complex wake vortices are the footprints of lift generation; thus, the time-averaged vortex lift can be estimated from wake velocity data. Computational fluid dynamics modeling, quasi-steady models, and vortex lift models are useful tools to elucidate the intrinsic relationships between the lift and the dominant vortices in the near- and far-fields in flapping flight.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":"7 12","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49697551","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

Fluid Dynamics of Squirmers and Ciliated Microorganisms 蠕动体和纤毛微生物的流体动力学

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-09-22 DOI: 10.1146/annurev-fluid-121021-042929

Takuji Ishikawa

{"title":"Fluid Dynamics of Squirmers and Ciliated Microorganisms","authors":"Takuji Ishikawa","doi":"10.1146/annurev-fluid-121021-042929","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-042929","url":null,"abstract":"The fluid dynamics of microswimmers has received attention from the fields of microbiology, microrobotics, and active matter. Microorganisms have evolved organelles termed cilia for propulsion through liquids. Each cilium periodically performs effective and recovery strokes, creating a metachronal wave as a whole and developing a propulsive force. One well-established mathematical model of ciliary swimming is the squirmer model, which focuses on surface squirming velocities. This model is also useful when studying active colloids and droplets. The squirmer model has been recently used to investigate the behaviors of microswimmers in complex environments, their collective dynamics, and the characteristics of active fluids. Efforts have also been made to broaden the range of applications beyond the assortment permitted by the squirmer model, which was established to specifically represent ciliary flow and incorporate biological features. The stress swimmer model imposes stresses above the cell body surface that enforce the no-slip condition. The ciliated swimmer model precisely reproduces the behaviors of each cilium that engages in mutual hydrodynamic interactions. Mathematical models have improved our understanding of various microbial phenomena, including cell–cell and cell–wall interactions and energetics. Here, I review recent advances in the hydrodynamics of ciliary swimming and then discuss future challenges.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":"8 1","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49697550","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

Flows Over Rotating Disks and Cones 流动在旋转的圆盘和锥上

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-09-15 DOI: 10.1146/annurev-fluid-121021-043651

P. Henrik Alfredsson, Kentaro Kato, R.J. Lingwood

引用次数: 0

Turbulent Drag Reduction by Streamwise Traveling Waves of Wall-Normal Forcing 沿流行波的壁法向力减少湍流阻力

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-08-24 DOI: 10.1146/annurev-fluid-120720-021445

K. Fukagata, K. Iwamoto, Y. Hasegawa

引用次数: 1

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":" ","pages":""},"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

{"title":"Statistical Models for the Dynamics of Heavy Particles in Turbulence","authors":"J. Bec, K. Gustavsson, B. Mehlig","doi":"10.1146/annurev-fluid-032822-014140","DOIUrl":"https://doi.org/10.1146/annurev-fluid-032822-014140","url":null,"abstract":"When very small particles are suspended in a fluid in motion, they tend to follow the flow. How such tracer particles are mixed, transported, and dispersed by turbulent flow has been successfully described by statistical models. Heavy particles, with mass densities larger than that of the carrying fluid, can detach from the flow. This results in preferential sampling, small-scale fractal clustering, and large collision velocities. To describe these effects of particle inertia, one must consider both particle positions and velocities in phase space. In recent years, statistical phase-space models have significantly contributed to our understanding of inertial-particle dynamics in turbulence. These models help to identify the key mechanisms and nondimensional parameters governing the particle dynamics and have made qualitative and, in some cases, quantitative predictions. This article reviews statistical phase-space models for the dynamics of small, yet heavy, spherical particles in turbulence. We evaluate their effectiveness by comparing their predictions with results from numerical simulations and laboratory experiments, and we summarize their successes and failures. 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":" ","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49632461","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: 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