Annual Review of Fluid Mechanics最新文献_第3页

Advances in Modeling Dense Granular Media 致密颗粒介质建模的进展

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2024-01-19 DOI: 10.1146/annurev-fluid-121021-022045

Ken Kamrin, Kimberly M. Hill, Daniel I. Goldman, Jose E. Andrade

引用次数: 0

Deformation and Breakup of Bubbles and Drops in Turbulence 湍流中气泡和液滴的变形和破裂

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-11-28 DOI: 10.1146/annurev-fluid-121021-034541

Rui Ni

{"title":"Deformation and Breakup of Bubbles and Drops in Turbulence","authors":"Rui Ni","doi":"10.1146/annurev-fluid-121021-034541","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-034541","url":null,"abstract":"Fragmentation of bubbles and droplets in turbulence produces a dispersed phase spanning a broad range of scales, encompassing everything from droplets in nanoemulsions to centimeter-sized bubbles entrained in breaking waves. Along with deformation, fragmentation plays a crucial role in enhancing interfacial area, with far-reaching implications across various industries, including food, pharmaceuticals, and ocean engineering. However, understanding and modeling these processes are challenging due to the complexity of anisotropic and inhomogeneous turbulence typically involved, the unknown residence time in regions with different turbulence intensities, and difficulties arising from the density and viscosity ratios. Despite these challenges, recent advances have provided new insights into the underlying physics of deformation and fragmentation in turbulence. This review summarizes existing works in various fields, highlighting key results and uncertainties, and examining the impact on turbulence modulation, drag reduction, and heat and mass transfer.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":"76 1","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138449706","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: 1

Learning Nonlinear Reduced Models from Data with Operator Inference 利用算子推理从数据中学习非线性约简模型

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-11-02 DOI: 10.1146/annurev-fluid-121021-025220

Boris Kramer, Benjamin Peherstorfer, Karen E. Willcox

{"title":"Learning Nonlinear Reduced Models from Data with Operator Inference","authors":"Boris Kramer, Benjamin Peherstorfer, Karen E. Willcox","doi":"10.1146/annurev-fluid-121021-025220","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-025220","url":null,"abstract":"This review discusses Operator Inference, a nonintrusive reduced modeling approach that incorporates physical governing equations by defining a structured polynomial form for the reduced model, and then learns the corresponding reduced operators from simulated training data. The polynomial model form of Operator Inference is sufficiently expressive to cover a wide range of nonlinear dynamics found in fluid mechanics and other fields of science and engineering, while still providing efficient reduced model computations. The learning steps of Operator Inference are rooted in classical projection-based model reduction; thus, some of the rich theory of model reduction can be applied to models learned with Operator Inference. This connection to projection-based model reduction theory offers a pathway toward deriving error estimates and gaining insights to improve predictions. Furthermore, through formulations of Operator Inference that preserve Hamiltonian and other structures, important physical properties such as energy conservation can be guaranteed in the predictions of the reduced model beyond the training horizon. This review illustrates key computational steps of Operator Inference through a large-scale combustion example.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":"6 16","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71418005","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 Airtanker Firefighting 空中加油机灭火的流体动力学

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-31 DOI: 10.1146/annurev-fluid-121021-041642

Dominique Legendre

{"title":"Fluid Dynamics of Airtanker Firefighting","authors":"Dominique Legendre","doi":"10.1146/annurev-fluid-121021-041642","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-041642","url":null,"abstract":"Airtanker firefighting is the most spectacular tool used to fight wildland fires. However, it employs a rudimentary large-scale spraying technology operating at a high speed and a long distance from the target. This review gives an overview of the fluid dynamics processes that govern this practice, which are characterized by rich and varied physical phenomena. The liquid column penetration in the air, its large-scale fragmentation, and an intense surface atomization give shape to the rainfall produced by the airtanker and the deposition of the final product on the ground. The cloud dynamics is controlled by droplet breakup, evaporation, and wind dispersion. The process of liquid deposition onto the forest canopy is full of open questions of great interest for rainfall retention in vegetation. Of major importance, but still requiring investigation, is the role of the complex non-Newtonian viscoelastic and shear-thinning behavior of the retardant dropped to stop the fire propagation. The review describes the need for future research devoted to the subject.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":"3 7","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71417587","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

The Early Days and Rise of Turbulence Simulation 湍流模拟的早期和兴起

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-10 DOI: 10.1146/annurev-fluid-120821-025116

John Kim, Anthony Leonard

引用次数: 0

Multiscale Velocity Gradients in Turbulence 湍流中的多尺度速度梯度

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-10 DOI: 10.1146/annurev-fluid-121021-031431

Perry L. Johnson, Michael Wilczek

{"title":"Multiscale Velocity Gradients in Turbulence","authors":"Perry L. Johnson, Michael Wilczek","doi":"10.1146/annurev-fluid-121021-031431","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-031431","url":null,"abstract":"Understanding and predicting turbulent flow phenomena remain a challenge for both theory and applications. The nonlinear and nonlocal character of small-scale turbulence can be comprehensively described in terms of the velocity gradients, which determine fundamental quantities like dissipation, enstrophy, and the small-scale topology of turbulence. The dynamical equation for the velocity gradient succinctly encapsulates the nonlinear physics of turbulence; it offers an intuitive description of a host of turbulence phenomena and enables establishing connections between turbulent dynamics, statistics, and flow structure. The consideration of filtered velocity gradients enriches this view to express the multiscale aspects of nonlinearity and flow structure in a formulation directly applicable to large-eddy simulations. Driven by theoretical advances together with growing computational and experimental capabilities, recent activities in this area have elucidated key aspects of turbulence physics and advanced modeling capabilities.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":"3 4","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49696788","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: 1

Fluid-Elastic Interactions near Contact at Low Reynolds Number 低雷诺数下近接触流体-弹性相互作用

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-10 DOI: 10.1146/annurev-fluid-120720-024426

Bhargav Rallabandi

引用次数: 1

Large-Scale Eddy-Mean Flow Interaction in the Earth's Extratropical Atmosphere 地球温带大气中大尺度涡旋-平均流相互作用

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-03 DOI: 10.1146/annurev-fluid-121021-035602

Noboru Nakamura

引用次数: 0

The Dynamics of Jupiter's and Saturn's Weather Layers: A Synthesis After Cassini and Juno 木星和土星天气层的动力学:卡西尼号和朱诺号之后的综合

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-03 DOI: 10.1146/annurev-fluid-121021-040058

Peter L. Read

{"title":"The Dynamics of Jupiter's and Saturn's Weather Layers: A Synthesis After Cassini and Juno","authors":"Peter L. Read","doi":"10.1146/annurev-fluid-121021-040058","DOIUrl":"https://doi.org/10.1146/annurev-fluid-121021-040058","url":null,"abstract":"Until recently, observations of the giant planets of our Solar System were confined to sampling relatively shallow regions of their atmospheres, leaving many uncertainties as to the dynamics of deeper layers. The Cassini and Juno missions to Saturn and Jupiter, however, have begun to address these issues, for example, by measuring their gravity and magnetic fields. The results show that the zonally coherent jets and cloud bands extend to levels where the electrical conductivity of the fluid becomes significant, whereas large-scale vortices, such as the Great Red Spot, are relatively shallow but may have deep-seated roots. The polar regions also exhibit intense cyclonic vortices that, on Jupiter, arrange themselves into remarkably regular “vortex crystals.” Numerical models seem able to capture some of this complexity, but many issues remain unresolved, suggesting a need for models that can represent both deep and shallow processes sufficiently realistic ally to compare with observations.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":"4 6","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49697134","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

Building Ventilation: The Consequences for Personal Exposure 建筑物通风:个人暴露的后果

IF 27.7 1区工程技术

Annual Review of Fluid Mechanics Pub Date : 2023-10-03 DOI: 10.1146/annurev-fluid-120720-015857

Rajesh K. Bhagat, Stuart B. Dalziel, M.S. Davies Wykes, P.F. Linden

{"title":"Building Ventilation: The Consequences for Personal Exposure","authors":"Rajesh K. Bhagat, Stuart B. Dalziel, M.S. Davies Wykes, P.F. Linden","doi":"10.1146/annurev-fluid-120720-015857","DOIUrl":"https://doi.org/10.1146/annurev-fluid-120720-015857","url":null,"abstract":"Ventilation is central to human civilization. Without it, the indoor environment rapidly becomes uncomfortable or dangerous, but too much ventilation can be expensive. We spend much of our time indoors, where we are exposed to pollutants and can be infected by airborne diseases. Ventilation removes pollution and bioaerosols from indoor sources but also brings in pollution from outdoors. To determine an appropriate level of ventilation and an appropriate way of providing it, one must understand that the needs for ventilation extend beyond simple thermal comfort; the quality of indoor air is at least as important. An effective ventilation system will remove unwanted contaminants, whether generated within the space by activities or by the simple act of breathing, and ensure that the ventilation system does not itself introduce or spread contaminants from elsewhere. This review explores how ventilation flow in buildings influences personal exposure to indoor pollutants and the spread of airborne diseases.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":"4 10","pages":""},"PeriodicalIF":27.7,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49697131","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