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Coalescence Of Single Drops At Liquid Liquid And Liquid Solid Interfaces
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Book Synopsis Coalescence of Single Drops at Liquid-liquid and Liquid-solid Interfaces by : W. D. Weatherford
Download or read book Coalescence of Single Drops at Liquid-liquid and Liquid-solid Interfaces written by W. D. Weatherford and published by . This book was released on 1967 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coalescence of Single Drops at Liquid-liquid and Liquid-solid Interfaces by : W. D Weatherford (Jr)
Download or read book Coalescence of Single Drops at Liquid-liquid and Liquid-solid Interfaces written by W. D Weatherford (Jr) and published by . This book was released on 1967 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a research and development program on fuel handling and decontamination, a study is being conducted to develop a better understanding of the basic phenomena involved in filter-separator operation. This study has led to the development of a new analytical model of coalescence processes. The model is based upon considerations of the dynamics of molecular processes in the vicinity of interfaces (either liquid-liquid or liquid-solid) and includes film-drainage as well as interface-coalescence phenomena. Experimental studies included the use of selected additives in either the aqueous drops and bulk phase or in the hydrocarbon continuous medium, or both. Liquid-liquid interfacial tension was varied from less than 10 to greater than 50 dynes/cm; viscosity of the hydrocarbon phase was varied from less than 1 to greater than 200 centistokes; and the average coalescence time ranged from less than 1 to greater than 300 seconds. The experimentally measured coalescence times and initial rates of contact angle decay have been correlated successfully in terms of the analytical model. (Author).
Book Synopsis Coalescence of Liquid Drops at Liquid-liquid Interfaces by : Hamarz Aryafar
Download or read book Coalescence of Liquid Drops at Liquid-liquid Interfaces written by Hamarz Aryafar and published by . This book was released on 2008 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coalescence of Liquid Drops at a Flat Liquid-liquid Interface by : Samuel Jacob Huffman
Download or read book Coalescence of Liquid Drops at a Flat Liquid-liquid Interface written by Samuel Jacob Huffman and published by . This book was released on 1973 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coalescence of a Single Droplet at a Liquid-liquid Interface by : M. Greaves
Download or read book Coalescence of a Single Droplet at a Liquid-liquid Interface written by M. Greaves and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Droplet Coalescence at a Planar Liquid-liquid Interface by : Venkatakrishnan Vankatesh
Download or read book Droplet Coalescence at a Planar Liquid-liquid Interface written by Venkatakrishnan Vankatesh and published by . This book was released on 1974 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intensification of Liquid–Liquid Processes by : Laurence R. Weatherley
Download or read book Intensification of Liquid–Liquid Processes written by Laurence R. Weatherley and published by Cambridge University Press. This book was released on 2020-04-16 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore and review novel techniques for intensifying transport and reaction in liquid-liquid and related systems with this essential toolkit. Topics include discussion of the principles of process intensification, the nexus between process intensification and sustainable engineering, and the fundamentals of liquid-liquid contacting, from an expert with over forty-five years' experience in the field. Providing promising directions for investment and for new research in process intensification, in addition to a unique review of the fundamentals of the topic, this book is the perfect guide for senior undergraduate students, graduate students, developers, and research staff in chemical engineering and biochemical engineering.
Book Synopsis Phenomena of Coalescence of Liquid Drops at Liquid/liquid and Liquid/air Interfaces by : Eliza Marie Honey
Download or read book Phenomena of Coalescence of Liquid Drops at Liquid/liquid and Liquid/air Interfaces written by Eliza Marie Honey and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Drop Coalescence with Liquid/liquid Interfaces in the Presence of Surfactants by : Teng Dong
Download or read book Drop Coalescence with Liquid/liquid Interfaces in the Presence of Surfactants written by Teng Dong and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dissertation describes the experimental investigations on the effect of surfactants on drop coalescence with liquid/liquid interfaces. Different coalescence events are carried out in two unique-designed vessels at different dimensions. Optical methods including high-speed shadowgraphy and Particle Image Velocimetry (PIV) are applied to detect the drop surface behaviour and the drop inner dynamics. Planar Laser Induced Fluorescence (PLIF) is also utilized to detect the spatio-temporal distribution of surfactants on the coalescing drop surface. A novel flow channel is developed to investigate the surfing drops at moving liquid/liquid interfaces at last. Initially, the total coalescence of drops with the liquid/liquid interfaces, both packed with surfactants at concentrations up to the Critical Micelle Concentration (CMC), are studied. It is found that the increase of the surfactant concentration promotes the deformation of the interface before the film that separates the drop from the interface drains and ruptures. After the film rupture, two counter-rotating vortices appear inside the drop, which move faster at low surfactant concentrations. The intensities of the two counter-rotating vortices significantly decrease at increasing surfactant concentration. In the second part of the dissertation, the experimental results on the partial coalescence of drops are presented. The coalescence map based on the dimensionless numbers Oh=AÌ‚Î1⁄4_d/(Ï _mσD)^1/2 and Bo = (ΆϠgD^2)/σ is plotted to distinguish the partial coalescence region, which is found to reduce in the presence of surfactants. The size ratios of the daughter to the mother drop are measured and plotted against the Bo and Oh as well. In the gravity dominant regime, the surfactants have a negligible effect on the drop ratio, while in the inertia-capillary regime the drop size ratio decreases with increasing surfactant concentration. The velocity fields inside the partial coalescing drop are acquired. In the surfactant-free system, it is found that the inward motion of the fluids at the upper part of the drop favours the generation of a liquid cylinder in the early stages. The pressure gradient created by the downward stream at the bottom of the liquid cylinder is believed to cause the pinch-off of the cylinder and the formation of the secondary droplet. The surfactants tend to make the coalescence non-symmetric resulting in total coalescence. The spatiotemporal distributions of surfactants on the merging interfaces are presented in the following part. It is found that when a drop rests on an interface, the surfactants that have been adsorbed on the interfaces are swept outwards by the draining liquid film between the drop and the flat interface and reach a peak value at about 0.75R away from the center, where R is the horizontal drop radius. After the film ruptures, the surfactant concentration at the tip of the retreating meniscus continues to increase. Once the film has retracted to the drop sides, the concentration of the surfactants peaks at the meniscus at the bottom of the drop. The variation of the surfactant concentration along the merging interfaces in the later stages is presented as well. In the end, the delayed coalescence of drops with moving liquid-liquid interfaces is experimentally investigated. Drops are released onto the moving interfaces at velocities from 0 cm/s up to 3.4 cm/s. Drop coalescence is found to be largely delayed at increasing interface speed, which is attributed to the lubrication pressure developed in the draining film. Numerical simulations are conducted for a half-pendent drop levitating on a moving liquid-liquid interface. The results indicate that the minimum pressure appears at the front bottom of the moving drop, where most of the film ruptures are observed to take place. Also, the pressure in the film is calculated based on the local curvature of the drop surface and the tangential velocities on the drop surface and on the interface in the film region. It is found that the lubrication pressure increases with the interface speed. The PLIF technique is used to measure the drop shape and the film thickness between the drop and the interface. A dimple structure in the film is more likely to form at lower interface speeds, while the film tends to be flat when the interfaces move with high speed. During coalescence of drops with moving interfaces, in some cases when films are thicker, the liquid in the film cannot completely drain out but form drops-on-string resulting in the oil entrainment in the aqueous phase.
Book Synopsis The Effect of Velocity on the Coalescence of Liquid Drops Impacting a Liquid-liquid Interface by : David Bradley Clark
Download or read book The Effect of Velocity on the Coalescence of Liquid Drops Impacting a Liquid-liquid Interface written by David Bradley Clark and published by . This book was released on 1978 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Understanding Soft Condensed Matter Via Modeling And Computation by : An-chang Shi
Download or read book Understanding Soft Condensed Matter Via Modeling And Computation written by An-chang Shi and published by World Scientific. This book was released on 2010-12-14 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: All living organisms consist of soft matter. For this reason alone, it is important to be able to understand and predict the structural and dynamical properties of soft materials such as polymers, surfactants, colloids, granular matter and liquids crystals. To achieve a better understanding of soft matter, three different approaches have to be integrated: experiment, theory and simulation. This book focuses on the third approach — but always in the context of the other two.
Book Synopsis Dynamics of Drop Impact and Coalescence at a Liquid/liquid Interface by : Ahmad Zulfaa Mohamed-Kassim
Download or read book Dynamics of Drop Impact and Coalescence at a Liquid/liquid Interface written by Ahmad Zulfaa Mohamed-Kassim and published by . This book was released on 2003 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Liquid-Liquid Extraction by : C. Hanson
Download or read book Recent Advances in Liquid-Liquid Extraction written by C. Hanson and published by Elsevier. This book was released on 2013-10-22 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Advances in Liquid-liquid Extraction focuses on the applications of liquid extraction. The selection first discusses solvent extraction. Concerns include organic and inorganic separations, mass transfer process, solvent extraction economics, and coalescence in liquid-liquid systems. The book focuses on the chemistry of solvent extraction. Extraction by acidic organophosphorus compounds; extraction by phosphorus-bonded oxygen-donor solvents; extraction by high-molecular weight amines; and synergistic extraction are elaborated. The book also focuses on industrial organic processes; industrial contacting equipment; response characteristics and control of extraction processes; and calculation of contactors with longitudinal mixing. The selection presents the study of longitudinal mixing in liquid-liquid contactors. Rotating disc contactors, packed columns, vibrating plate extractors, and Oldshue-Rushton columns are described. The text also discusses heat transfer by direct liquid-liquid contact and the coalescence of liquid droplets and liquid dispersion. The selection is a vital source of data for readers interested in liquid extraction.
Book Synopsis Fluid Dynamics in and Near Liquid Drops at a Liquid - Liquid Interface During Coalescence by : Bruce Howard Davey
Download or read book Fluid Dynamics in and Near Liquid Drops at a Liquid - Liquid Interface During Coalescence written by Bruce Howard Davey and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coalescence in Liquid-liquid Systems by : Thomas D. Hodgson
Download or read book Coalescence in Liquid-liquid Systems written by Thomas D. Hodgson and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coalescence Behaviour of Liquid Drops at Plane Interfaces by : Graham Lawson
Download or read book Coalescence Behaviour of Liquid Drops at Plane Interfaces written by Graham Lawson and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Liquid Interfaces with Compositional Gradients by : Stefan Karpitschka
Download or read book Dynamics of Liquid Interfaces with Compositional Gradients written by Stefan Karpitschka and published by . This book was released on 2012 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: