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Author: Danuska Pathiranage Publisher: GRIN Verlag ISBN: 3346524698 Category : Technology & Engineering Languages : en Pages : 47
Book Description
Bachelor Thesis from the year 2020 in the subject Engineering - Aerospace Technology, grade: First Class, University of Brighton, course: BEng Aeronautical Engineering, language: English, abstract: This project investigates the effects of different wettability characteristics in drop wise condensation on smooth plates. It involves a Volume of Fluid (VOF) based Computational. Condensers are used in various energy intensive processing industries. Improving their efficiency plays a crucial role in optimization of energy consumption. Drop wise Condensation is a highly attractive form of heat transfer. Fluids Dynamics (CFD) model to carry out the simulations in OpenFOAM on smooth plates with various wettabilities. Different parameters such as receding angle, advancing angle and various radii of droplets have been used for investigation. A base case with droplets’ radius of 12.5μm, receding angle and advancing angles of (34°, 90°) was used. Three sets of simulations were performed. In Set 1, the angles were (34°, 90°). The radius of the first droplet was kept constant at 12.5μm and the radius of the second droplet changes 1:4 progressively. In Set 2, the angles are changed to (154°,162°) and the radius of the second droplet changes in the same manner above. In Set 3, the angles were kept at (107°, 117°). The radius changes as above. In some cases, the droplets merge and condense. In others, momentum created by merging of the droplets creates repeated oscillation or even a lift off, from the cooled plate.
Author: Danuska Pathiranage Publisher: GRIN Verlag ISBN: 3346524698 Category : Technology & Engineering Languages : en Pages : 47
Book Description
Bachelor Thesis from the year 2020 in the subject Engineering - Aerospace Technology, grade: First Class, University of Brighton, course: BEng Aeronautical Engineering, language: English, abstract: This project investigates the effects of different wettability characteristics in drop wise condensation on smooth plates. It involves a Volume of Fluid (VOF) based Computational. Condensers are used in various energy intensive processing industries. Improving their efficiency plays a crucial role in optimization of energy consumption. Drop wise Condensation is a highly attractive form of heat transfer. Fluids Dynamics (CFD) model to carry out the simulations in OpenFOAM on smooth plates with various wettabilities. Different parameters such as receding angle, advancing angle and various radii of droplets have been used for investigation. A base case with droplets’ radius of 12.5μm, receding angle and advancing angles of (34°, 90°) was used. Three sets of simulations were performed. In Set 1, the angles were (34°, 90°). The radius of the first droplet was kept constant at 12.5μm and the radius of the second droplet changes 1:4 progressively. In Set 2, the angles are changed to (154°,162°) and the radius of the second droplet changes in the same manner above. In Set 3, the angles were kept at (107°, 117°). The radius changes as above. In some cases, the droplets merge and condense. In others, momentum created by merging of the droplets creates repeated oscillation or even a lift off, from the cooled plate.
Author: Publisher: Springer ISBN: 9783319266947 Category : Science Languages : en Pages : 0
Book Description
This Handbook provides researchers, faculty, design engineers in industrial R&D, and practicing engineers in the field concise treatments of advanced and more-recently established topics in thermal science and engineering, with an important emphasis on micro- and nanosystems, not covered in earlier references on applied thermal science, heat transfer or relevant aspects of mechanical/chemical engineering. Major sections address new developments in heat transfer, transport phenomena, single- and multiphase flows with energy transfer, thermal-bioengineering, thermal radiation, combined mode heat transfer, coupled heat and mass transfer, and energy systems. Energy transport at the macro-scale and micro/nano-scales is also included. The internationally recognized team of authors adopt a consistent and systematic approach and writing style, including ample cross reference among topics, offering readers a user-friendly knowledgebase greater than the sum of its parts, perfect for frequent consultation. The Handbook of Thermal Science and Engineering is ideal for academic and professional readers in the traditional and emerging areas of mechanical engineering, chemical engineering, aerospace engineering, bioengineering, electronics fabrication, energy, and manufacturing concerned with the influence thermal phenomena.
Author: Sameer Khandekar Publisher: Springer Science & Business Media ISBN: 1461484472 Category : Science Languages : en Pages : 155
Book Description
Dropwise Condensation on Textured Surfaces presents a holistic framework for understanding dropwise condensation through mathematical modeling and meaningful experiments. The book presents a review of the subject required to build up models as well as to design experiments. Emphasis is placed on the effect of physical and chemical texturing and their effect on the bulk transport phenomena. Application of the model to metal vapor condensation is of special interest. The unique behavior of liquid metals, with their low Prandtl number and high surface tension, is also discussed. The model predicts instantaneous drop size distribution for a given level of substrate subcooling and derives local as well as spatio-temporally averaged heat transfer rates and wall shear stress.
Author: Kock-Yee Law Publisher: Springer ISBN: 3319252143 Category : Technology & Engineering Languages : en Pages : 169
Book Description
This book describes wetting fundamentals and reviews the standard protocol for contact angle measurements. The authors include a brief overview of applications of contact angle measurements in surface science and engineering. They also discuss recent advances and research trends in wetting fundamentals and include measurement techniques and data interpretation of contract angles.
Author: S.G. Kandlikar Publisher: Routledge ISBN: 1351442198 Category : Science Languages : en Pages : 786
Book Description
Provides a comprehensive coverage of the basic phenomena. It contains twenty-five chapters which cover different aspects of boiling and condensation. First the specific topic or phenomenon is described, followed by a brief survey of previous work, a phenomenological model based on current understanding, and finally a set of recommended design equa
Author: Ari Laaksonen Publisher: Elsevier ISBN: 0128143223 Category : Science Languages : en Pages : 296
Book Description
Nucleation of Water: From Fundamental Science to Atmospheric and Additional Applications provides a comprehensive accounting of the current state-of-the-art regarding the nucleation of water. It covers vapor-liquid, liquid-vapor, liquid-ice and vapor-ice transitions and describes basic kinetic and thermodynamic concepts in a manner understandable to researchers working on specific applications. The main focus of the book lies in atmospheric phenomena, but it also describes engineering and biological applications. Bubble nucleation, although not of major atmospheric relevance, is included for completeness. This book presents a single, go-to resource that will help readers understand the breadth and depth of nucleation, both in theory and in real-world examples. - Offers a single, comprehensive work on water nucleation, including cutting- edge research on ice, cloud and bubble nucleation - Written primarily for atmospheric scientists, but it also presents the theories in such a way that researchers in other disciplines will find it useful - Written by one of the world's foremost experts on ice nucleation
Author: Mahmood Aliofkhazraei Publisher: BoD – Books on Demand ISBN: 9535122150 Category : Science Languages : en Pages : 386
Book Description
On the liquid 's surface, the molecules have fewer neighbors in comparison with the bulk volume. As a result, the energy interaction shows itself in the surface tension. Traditionally, the surface tension can be assumed as a force in the unit of the length which can be counted by the unit of Newton on squared meter, or energy on the units of the surface. The surface tension, implies the interface between liquid and vapor, which is an example of the surface tensions. The equilibrium between these surface tensions, decides that a droplet on a solid surface, would have a droplet form or will change to layer form. This book collects new developments in wetting and wettability science.
Author: Marco Marengo Publisher: Springer ISBN: 9783030829940 Category : Science Languages : en Pages : 0
Book Description
The Surface Wettability Effect on Phase Change collects high level contributions from internationally recognised scientists in the field. It thoroughly explores surface wettability, with topics spanning from the physics of phase change, physics of nucleation, mesoscale modeling, analysis of phenomena such drop evaporation, boiling, local heat flux at triple line, Leidenfrost, dropwise condensation, heat transfer enhancement, freezing, icing. All the topics are treated by discussing experimental results, mathematical modeling and numerical simulations. In particular, the numerical methods look at direct numerical simulations in the framework of VOF simulations, phase-field simulations and molecular dynamics. An introduction to equilibrium and non-equilibrium thermodynamics of phase change, wetting phenomena, liquid interfaces, numerical simulation of wetting phenomena and phase change is offered for readers who are less familiar in the field. This book will be of interest to researchers, academics, engineers, and postgraduate students working in the area of thermofluids, thermal management, and surface technology.
Author: Pierre Lambert Publisher: MDPI ISBN: 3039215647 Category : Technology & Engineering Languages : en Pages : 240
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: Danuska Pathiranage
Author: Danuska Pathiranage
Author: 
Author: Sameer Khandekar
Author: Kock-Yee Law
Author: S.G. Kandlikar
Author: Ari Laaksonen
Author: Mahmood Aliofkhazraei
Author: American Electroplaters' Society
Author: Marco Marengo
Author: Pierre Lambert