An Experimental Study Of The Effects Of Liquid Properties In The Breakup Of A Two Dimensional Liquid Sheet
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An Experimental Study Of The Effects Of Liquid Properties In The Breakup Of A Two Dimensional Liquid Sheet
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Author : B. E. Stapper
language : en
Publisher:
Release Date : 1990
An Experimental Study Of The Effects Of Liquid Properties In The Breakup Of A Two Dimensional Liquid Sheet written by B. E. Stapper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Atomization categories.
The breakup of a liquid sheet is of fundamental interest in the atomization of liquid fuels. The present study explores the breakup of a two-dimensional liquid sheet in the presence of co-flow air with emphasis on the extent to which liquid properties affect breakup. Three liquids, selected with varying values of viscosity and surface tension, are introduced through a twin-fluid, two-dimensional nozzle. A pulsed laser imaging system is used to determine the sheet structure at breakup, the distance and time to breakup, and the character of the ligaments and droplets formed. Experiments are conducted at two liquid flow rates with five flow rates of co-flowing air. Liquid properties affect the residence time required to initiate sheet breakup, and alter the time and length scales in the breakup mechanism.
An Experimental Study Of The Breakup Of A Two Dimensional Liquid Sheet In The Presence Of Co Flow Air Shear
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Author : B. E. Stapper
language : en
Publisher:
Release Date : 1990
An Experimental Study Of The Breakup Of A Two Dimensional Liquid Sheet In The Presence Of Co Flow Air Shear written by B. E. Stapper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Proceedings Of The 5th Asia Pacific Drying Conference The In 2 Volumes
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Author : Guohua Chen
language : en
Publisher: World Scientific
Release Date : 2007-08-07
Proceedings Of The 5th Asia Pacific Drying Conference The In 2 Volumes written by Guohua Chen and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-08-07 with Technology & Engineering categories.
This volume consists of the papers presented at the 5th Asia-Pacific Drying Conference, held 13-15 August, 2007 China. The articles feature the most recent progress of drying R&D in the Asia-Pacific region. The proceedings is useful for graduate students, researchers and professionals in the field of drying research and development.
Numerical Study Of Primary Breakup Of Liquid Sheets
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Author : Mohammad Movassat
language : en
Publisher:
Release Date : 2007
Numerical Study Of Primary Breakup Of Liquid Sheets written by Mohammad Movassat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
The primary breakup of liquid sheets into ligaments has a great effect on the size, velocity, and penetration of the droplets produced further by the disintegration of ligaments. The generated ligaments can be categorized in two general types based on their orientation with respect to the flow field; span-wise and stream-wise ligaments. This work contains a two- and three-dimensional computational study of the primary breakup of a viscous liquid sheet. A Volume of Fluid (VOF) based code is used to solve the governing equations and capture the interface between the liquid sheet and the surrounding gas. Since the interaction between the liquid and gas is the major source of the breakup, the liquid-gas interface boundary is modified in this work and it is implemented using linear stability analysis. The variation in the breakup time and breakup length of liquid sheets with fluid properties is investigated by a two-dimensional study. Fluid properties are stated in three non-dimensional numbers: Weber number, Ohnesorge number and the gas to liquid density ratio. The liquid surface tension shows a stabilizing effect by increasing both the breakup time and breakup length of liquid sheets. The liquid viscosity has more complicated effects; it increases the breakup length while at a certain range of Weber numbers, increasing the viscosity decreases the breakup time. Increasing the surrounding gas density decreases both breakup length and time. The study is extended to three-dimension to capture the stream-wise ligaments as well as span-wise ligaments captured in two-dimension. The effect of fluid parameters on the formation of stream-wise ligaments is presented. A mesh refinement study is conducted which demonstrates that providing at least 7 computational cells per sheet thickness would lead to results which are not dependent on the mesh size.
Paper
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Author :
language : en
Publisher:
Release Date : 1998
Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Mechanical engineering categories.
Droplets And Sprays
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Author : Sergei Sazhin
language : en
Publisher: Springer
Release Date : 2014-05-19
Droplets And Sprays written by Sergei Sazhin and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-19 with Technology & Engineering categories.
Providing a clear and systematic description of droplets and spray dynamic models, this book maximises reader insight into the underlying physics of the processes involved, outlines the development of new physical and mathematical models and broadens understanding of interactions between the complex physical processes which take place in sprays. Complementing approaches based on the direct application of computational fluid dynamics (CFD), Droplets and Sprays treats both theoretical and practical aspects of internal combustion engine process such as the direct injection of liquid fuel, subcritical heating and evaporation. Including case studies that illustrate the approaches relevance to automotive applications, it is also anticipated that the described models can find use in other areas such as in medicine and environmental science.
Asme Technical Papers
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Author :
language : en
Publisher:
Release Date :
Asme Technical Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Mechanical engineering categories.
Annual Research Briefs
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Author : Center for Turbulence Research (U.S.)
language : en
Publisher:
Release Date : 2009
Annual Research Briefs written by Center for Turbulence Research (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Turbulence categories.
Small Scale Modeling And Simulation Of Incompressible Turbulent Multi Phase Flow
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Author : Stéphane Vincent
language : en
Publisher: Springer Nature
Release Date : 2022-10-06
Small Scale Modeling And Simulation Of Incompressible Turbulent Multi Phase Flow written by Stéphane Vincent and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-06 with Technology & Engineering categories.
The book provides basic and recent research insights concerning the small scale modeling and simulation of turbulent multi-phase flows. By small scale, it has to be understood that the grid size for the simulation is smaller than most of the physical time and space scales of the problem. Small scale modeling of multi-phase flows is a very popular topic since the capabilities of massively parallel computers allows to go deeper into the comprehension and characterization of realistic flow configurations and at the same time, many environmental and industrial applications are concerned such as nuclear industry, material processing, chemical reactors, engine design, ocean dynamics, pollution and erosion in rivers or on beaches. The work proposes a complete and exhaustive presentation of models and numerical methods devoted to small scale simulation of incompressible turbulent multi-phase flows from specialists of the research community. Attention has also been paid to promote illustrations and applications, multi-phase flows and collaborations with industry. The idea is also to bring together developers and users of different numerical approaches and codes to share their experience in the development and validation of the algorithms and discuss the difficulties and limitations of the different methods and their pros and cons. The focus will be mainly on fixed-grid methods, however adaptive grids will be also partly broached, with the aim to compare and validate the different approaches and models.
Droplets And Sprays Simple Models Of Complex Processes
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Author : Sergei S. Sazhin
language : en
Publisher: Springer Nature
Release Date : 2022-06-28
Droplets And Sprays Simple Models Of Complex Processes written by Sergei S. Sazhin and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-28 with Technology & Engineering categories.
This book acts as a guide to simple models that describe some of the complex fluid dynamics, heat/mass transfer and combustion processes in droplets and sprays. Attention is focused mainly on the use of classical hydrodynamics, and a combination of kinetic and hydrodynamic models, to analyse the heating and evaporation of mono- and multi-component droplets. The models were developed for cases when small and large numbers of components are present in droplets. Some of these models are used for the prediction of time to puffing/micro-explosion of composite water/fuel droplets — processes that are widely used in combustion devices to stimulate disintegration of relatively large droplets into smaller ones. The predictions of numerical codes based on these models are validated against experimental results where possible. In most of the models, droplets are assumed to be spherical; some preliminary results of the generalisation of these models to the case of non-spherical droplets, approximating them as spheroids, are presented.