Influence of Phase Orientation on Dynamic Interfacial Tension Measured by Drop Volume Tensiometry PDF Download
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Author: Dongmin Wu
Publisher:
ISBN:
Category : Interfaces (Physical sciences)
Languages : en
Pages : 0
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Author: Dongmin Wu
Publisher:
ISBN:
Category : Interfaces (Physical sciences)
Languages : en
Pages : 0
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Author:
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 560
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Book Description
Author: A.I. Rusanov
Publisher: Elsevier
ISBN: 9780080544656
Category : Technology & Engineering
Languages : en
Pages : 406
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Book Description
This is the first monograph devoted to interfacial tensiometry and is therefore the definitive source of information on measuring surface tension. More than 40 methods for measuring surface tension both at the liquid-fluid and solid-fluid boundaries are described including methods using computational techniques, tele- and video-apparatus, and laser techniques. A central place in the book has been given to methods based on the investigation of properties of liquid and gaseous menisci both in the presence or absence of a gravitational field and a rotational one. Their description is preceded by a chapter on the theory of menisci including the derivation of various forms of the Laplace formula. The application of the methods for studying the equilibrium and dynamic surface tension has been considered. Dynamic methods used for very small surface life-times are described and a separate chapter is devoted to the theory of surface tension which will ensure a better understanding of the material. A systematic analysis of the material embracing all kinds of interfaces including solid surfaces, the history of each method, its theoretical foundation, characterization of measuring procedures and setups, a large number of numeric tables and plots and representative illustrations make the book encyclopedic in character.
Author:
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 828
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Book Description
Author: Adriana L. Holguin
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
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Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2540
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Author: Ala Moradian
Publisher:
ISBN: 9780494395721
Category :
Languages : en
Pages : 390
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Book Description
Surface tension is the dominant parameter in many fundamental studies in fluid mechanics and plays a major role in many industrial processes. Methods for measuring surface tension of liquids may vary according to different temperature ranges. The objective of this study is to propose a new methodology for measuring surface tension of materials with high melting point. In this new containerless method, an atmospheric radio-frequency Inductively Coupled Plasma (RF-ICP) torch melts horizontal metallic rods, and a high-speed camera records the drop formation process caused by melting. The drop shapes are fitted by the theoretical Young-Laplace (YL) profiles to determine the surface tension. In addition to the measurements based on the drop shapes, this methodology provides the possibility of validating the results with three other methods for measuring surface tension: the drop weight, pendant drop, and drop oscillation method. The drop oscillation method was used to measure the surface tension and viscosity, based on the resonance frequency and damping rate of the oscillations, respectively. From the photographs of the melting process, the solid-liquid interface was found to be inclined at an angle to the horizontal. The effect of this inclination on surface tension measurement is investigated. The dynamics of drop formation are modeled numerically as drop ejection from a nozzle. The numerical model solves the axisymmetric Navier-Stokes equations, for both the melt and the surrounding gas. The numerical pendant drops are compared with the theoretical YL profiles. A detailed study of the differences between numerical and theoretical profiles demonstrates some of the hydrodynamic effects influencing the surface tension measurement methods that are based on drop profiles. Good agreement between the numerical and the theoretical drop profiles validated the procedure of fitting YL profiles on dynamic drop profiles during drop formation. In addition, using the proposed methodology, surface tension values measured based on the drop shapes can be incorporated into the numerical code. Therefore, experimental drops and numerical drops can be compared and the viscosity of the melt can be determined. This method is established based on copper and nickel; however, it can be applied to metals, alloys, and ceramics.
Author: Miller
Publisher: VSP
ISBN: 9004174958
Category : Science
Languages : en
Pages : 567
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Book Description
The book aims at describing the most important experimental methods for characterizing liquid interfaces, such as drop profile analysis, bubble pressure and drop volume tensiometry, capillary pressure technique, and oscillating drops and bubbles.
Author: Pierre Lambert
Publisher: MDPI
ISBN: 3039215647
Category : Technology & Engineering
Languages : en
Pages : 240
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Book Description
Building on advances in miniaturization and soft matter, surface tension effects are a major key to the development of soft/fluidic microrobotics. Benefiting from scaling laws, surface tension and capillary effects can enable sensing, actuation, adhesion, confinement, compliance, and other structural and functional properties necessary in micro- and nanosystems. Various applications are under development: microfluidic and lab-on-chip devices, soft gripping and manipulation of particles, colloidal and interfacial assemblies, fluidic/droplet mechatronics. The capillary action is ubiquitous in drops, bubbles and menisci, opening a broad spectrum of technological solutions and scientific investigations. Identified grand challenges to the establishment of fluidic microrobotics include mastering the dynamics of capillary effects, controlling the hysteresis arising from wetting and evaporation, improving the dispensing and handling of tiny droplets, and developing a mechatronic approach for the control and programming of surface tension effects. In this Special Issue of Micromachines, we invite contributions covering all aspects of microscale engineering relying on surface tension. Particularly, we welcome contributions on fundamentals or applications related to: Drop-botics: fluidic or surface tension-based micro/nanorobotics: capillary manipulation, gripping, and actuation, sensing, folding, propulsion and bio-inspired solutions; Control of surface tension effects: surface tension gradients, active surfactants, thermocapillarity, electrowetting, elastocapillarity; Handling of droplets, bubbles and liquid bridges: dispensing, confinement, displacement, stretching, rupture, evaporation; Capillary forces: modelling, measurement, simulation; Interfacial engineering: smart liquids, surface treatments; Interfacial fluidic and capillary assembly of colloids and devices; Biological applications of surface tension, including lab-on-chip and organ-on-chip systems.
Author:
Publisher:
ISBN:
Category : Petroleum
Languages : en
Pages : 704
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Book Description
