Download or read book Computational Simulation of Droplet Collision Dynamics written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Droplet collision was simulated using two computational approaches, namely front tracking and molecular dynamics. By using the front tracking technique, the collision sequence in different collision regimes was simulated, the history of pressure and viscous dissipation within the droplet was spatially resolved, and the energy partition among the various modes was identified. By using the molecular dynamics method, bouncing and coalescence were successfully simulated for the first time without the artificial manipulation of the inter-droplet gaseous film. Several flame dynamics problems were also simulated, including flame-vortex interaction and flamefront instability in large-scale flows. In particular, it was found that wrinkling of a flame surface in the presence of a vortex is very much influenced by the Landau-Darrieus instability instead of the motion of the vortex itself, and that the wrinkling due to large-scale flows can suppress the formation of small-scale instabilities.

Download or read book Pilgrim Plymouth in Pictures written by and published by . This book was released on 1947 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Computational Study Of Non Newtonian Droplet Dynamics written by Kyle G. Mooney and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sprays are encountered regularly in many industrial and military applications including inkjets, cooling processes, evaporation processes, catalyzation, coatings, and propulsion chambers. Spray atomization phenomena of Newtonian fluids have received significant academic and industrial research attention, however, the effect of non-Newtonian rheologies on spray formation and downstream droplet behavior has not been as heavily investigated. The aim of this work is to elucidate the effect of non-Newtonian and viscoelastic rheological effects on droplet behavior in the context of secondary atomization and droplet collisions. This study utilizes finite volume computational fluid dynamics (CFD) to recreate droplet fluid physics in a numerical setting to a high accuracy. Droplet collision systems comprised of Newtonian, viscoelastic and shear-thinning rheologies are simulated using a Lagrangian moving-mesh interface tracking method (MMIT). This interface tracking approach provides increased surface curvature accuracy on relatively coarse meshes compared to many Eulerian multiphase methods. Modeling assumptions and interface mesh treatments are validated using existing analytical and experimental comparisons showing good agreement. Interpolation error due to cell deformation is minimized with local topological mesh adaptation and a global element quality optimization algorithm. The fully three dimensional computational study investigates the effect of these non-Newtonian and viscoelastic rheologies on a droplet collision. Here, simulated fluid ligaments exhibit increased stability with greater relative elasticity. By applying the similar simulation techniques to collisions of shear thinning droplets, a simple reduced order viscosity model has been produced, valid within a certain range of Weber number values. Another important atomization phenomenon, secondary breakup, is simulated using a volume of fluids (VOF) based interface capturing method applied to a centroid tracking moving mesh. Here, an axisymmetric CFD study of the wind induced break up of both Newtonian and non-Newtonian droplets is presented with comparisons with experimentally observed results. The numerical implementation is further verified by displaying accurate recreation of rapid micro-scale bubble collapse processes and subsequent jet ejection observed in controlled laboratory settings. The presented simulation results show capability in prediction of both the transient deformation morphology and the time scales in which droplet disintegration occurs.

Download or read book Droplet Dynamics Under Extreme Ambient Conditions written by Kathrin Schulte and published by Springer Nature. This book was released on 2022 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents the main results of the Collaborative Research Center SFB-TRR 75, which spanned the period from 2010 to 2022. Scientists from a variety of disciplines, ranging from thermodynamics, fluid mechanics, and electrical engineering to chemistry, mathematics, computer science, and visualization, worked together toward the overarching goal of SFB-TRR 75, to gain a deep physical understanding of fundamental droplet processes, especially those that occur under extreme ambient conditions. These are, for example, near critical thermodynamic conditions, processes at very low temperatures, under the influence of strong electric fields, or in situations with extreme gradients of boundary conditions. The fundamental understanding is a prerequisite for the prediction and optimisation of engineering systems with droplets and sprays, as well as for the prediction of droplet-related phenomena in nature. The book includes results from experimental investigations as well as new analytical and numerical descriptions on different spatial and temporal scales. The contents of the book have been organised according to methodological fundamentals, phenomena associated with free single drops, drop clusters and sprays, and drop and spray phenomena involving wall interactions.

Download or read book Droplet Collision Modeling in Multi dimensional Engine Spray Computation written by Achuth Munnannur and published by . This book was released on 2007 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fluid Dynamics and Transport of Droplets and Sprays written by W. A. Sirignano and published by Cambridge University Press. This book was released on 2010-01-11 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the theoretical foundations of spray and droplet applications relevant to the technology for active control of sprays applied to new products and applications, improved product performance, cost reductions, and improved environmental outcomes. It also covers theory related to power and propulsion; materials processing and manufacturing technologies including droplet-based net form processing, coating, and painting; medication; pesticides and insecticides; and other consumer uses.

Download or read book Droplet and Supercritical Flame Dynamics in Propulsion written by and published by . This book was released on 2010 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present program is concerned with the dynamics of droplet collision and flame-flow interaction that are of relevance to liquid-fueled turbulent combustion in high-pressure propulsive devices. The investigation during the reporting period involved six projects, namely: (1) Formulation of a comprehensive theory of the dynamics of binary droplet collision, especially in predicting the experimentally observed bouncing and coalescence phenomena; (2) Computational investigation of the gasification mechanism of multicomponent droplets, demonstrating that at elevated pressures the influence of liquid-phase mass diffusion is weakened; (3) A comprehensive study on the influence of elevated pressure on chemical kinetics; (4) Formulation of a theory of acoustic-flame resonance; (5) transition to detonation of an accelerating expanding flame; (6) computational simulation of the flame stabilization in a nozzle-generated flow.

Download or read book Numerical Simulations of Drop Collisions written by M. R. H. Nobari and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Quasimolecular Simulation of Liquid Droplet Collision and Thin Film Dynamics written by Sudipta Sikdar and published by . This book was released on 1994 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Methods in Multiphase Flow III written by Andrea Alberto Mammoli and published by WIT Press. This book was released on 2005 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: A common feature of multiphase flows is that a dispersed or discontinuous phase is being carried by a continuous phase, for example water drops in gas flow, solid particles in water flow, or gas bubbles in liquid flow. The overall behavior of the flow is shaped largely by the interaction between the discontinuous elements--drops, particles, bubbles

Download or read book Molecular Simulation of Droplet Collision written by Khyati M. Shukla and published by . This book was released on 2003 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Mechanics written by Zhenhan Yao and published by 清华大学出版社有限公司. This book was released on 2004 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computational Fluid Dynamics 2008 written by Haecheon Choi and published by Springer Science & Business Media. This book was released on 2009-07-23 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are delighted to present this book which contains the Proceedings of the Fifth International Conference on Computational Fluid Dynamics (ICCFD5), held in Seoul, Korea from July 7 through 11, 2008. The ICCFD series has established itself as the leading international conference series for scientists, mathematicians, and engineers specialized in the computation of fluid flow. In ICCFD5, 5 Invited Lectures and 3 Keynote Lectures were delivered by renowned researchers in the areas of innovative modeling of flow physics, innovative algorithm development for flow simulation, optimization and control, and advanced multidisciplinary - plications. There were a total of 198 contributed abstracts submitted from 25 countries. The executive committee consisting of C. H. Bruneau (France), J. J. Chattot (USA), D. Kwak (USA), N. Satofuka (Japan), and myself, was responsible for selection of papers. Each of the members had a separate subcommittee to carry out the evaluation. As a result of this careful peer review process, 138 papers were accepted for oral presentation and 28 for poster presentation. Among them, 5 (3 oral and 2 poster presentation) papers were withdrawn and 10 (4 oral and 6 poster presentation) papers were not presented. The conference was attended by 201 delegates from 23 countries. The technical aspects of the conference were highly beneficial and informative, while the non-technical aspects were fully enjoyable and memorable. In this book, 3 invited lectures and 1 keynote lecture appear first. Then 99 c- tributed papers are grouped under 21 subject titles which are in alphabetical order.

Download or read book Computational Methods in Surface and Colloid Science written by Malgorzata Borowko and published by CRC Press. This book was released on 2019-04-23 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents computer simulation methods and mathematical modelling of physical processes used in surface science research. It offers in-depth analysis of advanced theoretical approaches to behaviours of fluids in contact with porous, semiporous and nonporous solid surfaces. The book also explores interfacial systems for a wide variety of p

Download or read book Computational Fluid Dynamics Simulation of Spray Dryers written by Meng Wai Woo and published by CRC Press. This book was released on 2016-11-03 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the gap in understanding between the spray drying industry and the numerical modeler on spray drying, Computational Fluid Dynamics Simulation of Spray Dryers: An Engineer’s Guide shows how to numerically capture important physical phenomena within a spray drying process using the CFD technique. It includes numerical strategies to effectively describe these phenomena, which are collated from research work and CFD industrial consultation, in particular to the dairy industry. Along with showing how to set up models, the book helps readers identify the capabilities and uncertainties of the CFD technique for spray drying. After briefly covering the basics of CFD, the book discusses airflow modeling, atomization and particle tracking, droplet drying, quality modeling, agglomeration and wall deposition modeling, and simulation validation techniques. The book also answers questions related to common challenges in industrial applications.

Download or read book Dynamics of Droplets written by Arnold Frohn and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with the dynamical behaviour of single droplets and regular droplet systems. It has been written mainly for experimental researchers. After a short description of the theoretical background, the different experimental facilities and methods necessary for the investigation of single droplets are described in detail. A summary of important applications is included.

Download or read book Advanced Computational Fluid Dynamics for Emerging Engineering Processes written by Albert S. Kim and published by BoD – Books on Demand. This book was released on 2019-12-11 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: As researchers deal with processes and phenomena that are geometrically complex and phenomenologically coupled the demand for high-performance computational fluid dynamics (CFD) increases continuously. The intrinsic nature of coupled irreversibility requires computational tools that can provide physically meaningful results within a reasonable time. This book collects the state-of-the-art CFD research activities and future R