Download or read book Numerical Study of Transient Heat and Mass Transfer on a Moving Droplet with Condensation written by Zheng Jiang Tang and published by . This book was released on 1991 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Study of Thermocapillary Effects on Transient Droplet Heating and Vaporization written by Hamid Niazmand and published by . This book was released on 1993 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1965 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport Phenomena with Drops and Bubbles written by Satwindar S. Sadhal and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid flows that transfer heat and mass often involve drops and bubbles, particularly if there are changes of phase in the fluid in the formation or condensation of steam, for example. Such flows pose problems for the chemical and mechanical engineer significantly different from those posed by single-phase flows. This book reviews the current state of the field and will serve as a reference for researchers, engineers, teachers, and students concerned with transport phenomena. It begins with a review of the basics of fluid flow and a discussion of the shapes and sizes of fluid particles and the factors that determine these. The discussion then turns to flows at low Reynolds numbers, including effects due to phase changes or to large radial inertia. Flows at intermediate and high Reynolds numbers are treated from a numerical perspective, with reference to experimental results. The next chapter considers the effects of solid walls on fluid particles, treating both the statics and dynamics of the particle-wall interaction and the effects of phase changes at a solid wall. This is followed by a discussion of the formation and breakup of drops and bubbles, both with and without phase changes. The last two chapters discuss compound drops and bubbles, primarily in three-phase systems, and special topics, such as transport in an electric field.
Download or read book Advances in Heat Transfer written by and published by Academic Press. This book was released on 1995-05-25 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heat Transfer is designed to fill the information gap between regularly scheduled journals and university level textbooks by providing in-depth review articles over a broader scope than is allowablein either journals or texts.
Download or read book Drop Dynamics and Dropwise Condensation on Textured Surfaces written by Sameer Khandekar and published by Springer Nature. This book was released on 2020-09-11 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an expanded form of the monograph, Dropwise Condensation on Inclined Textured Surfaces, Springer, 2013, published earlier by the authors, wherein a mathematical model for dropwise condensation of pure vapor over inclined textured surfaces was presented, followed by simulations and comparison with experiments. The model factored in several details of the overall quasi-cyclic process but approximated those at the scale of individual drops. In the last five years, drop level dynamics over hydrophobic surfaces have been extensively studied. These results can now be incorporated in the dropwise condensation model. Dropwise condensation is an efficient route to heat transfer and is often encountered in major power generation applications. Drops are also formed during condensation in distillation devices that work with diverse fluids ranging from water to liquid metals. Design of such equipment requires careful understanding of the condensation cycle, starting from the birth of nuclei, followed by molecular clusters, direct growth of droplets, their coalescence, all the way to instability and fall-off of condensed drops. The model described here considers these individual steps of the condensation cycle. Additional discussions include drop shape determination under static conditions, a fundamental study of drop spreading in sessile and pendant configurations, and the details of the drop coalescence phenomena. These are subsequently incorporated in the condensation model and their consequences are examined. As the mathematical model is spread over multiple scales of length and time, a parallelization approach to simulation is presented. Special topics include three-phase contact line modeling, surface preparation techniques, fundamentals of evaporation and evaporation rates of a single liquid drop, and measurement of heat transfer coefficient during large-scale condensation of water vapor. We hope that this significantly expanded text meets the expectations of design engineers, analysts, and researchers working in areas related to phase-change phenomena and heat transfer.
Download or read book Heat and Mass Transfer Associated with a Spray Drop Experiencing Condensation written by Lin Jie Huang and published by . This book was released on 1986 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental and Numerical Study of Droplet Motion and Enhanced Condensation Due to Mechanical Vibrations written by Ryan Andrew Huber and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Energy-Water nexus is devoted to studying how to reduce the amount of water consumption needed to produce power. In 2010, the U.S. energy production accounted for 40% of freshwater withdrawals and 3% of freshwater consumption [1]. This research focuses on reducing the amount of drift loss from evaporative cooling towers at power plants by condensing the drift loss while it is inside the cooling tower, so it may be collected and reused or recycled in the area. Ghosh et al. [2] used a simple mesh screen in order to collect 40% of the drift loss. This research studies the impacts of vibrations on droplet shedding during condensation; the sooner droplets depart from the condensing surface, the higher the rate of heat transfer [3, 4]. This research focuses on understanding the fundamentals of the droplets motion on a vertical hydrophobic surface in order to determine how to best utilize vibrational forces in order to shed the droplets as fast as possible. Visualization studies examined the droplet modes of 3-μL water droplets at three different vibration settings (i.e., 30 Hz, 70 Hz, and 100 Hz). The resulting modes that were observed were rocking (i.e., no droplet slip), ratchet (i.e., droplet slipping), and ejection (i.e., detaching from the surface). In addition to filtered and de-ionized (DI) water, three other water samples (e.g., simulated salt, flue gas desulfurization, and cooling tower blowdown) were tested in this manner in order to determine how the water properties affected the droplet modes. Numerical studies using the lattice Boltzmann method were validated against experimental results. Numerical studies of the de-ionized water droplets allowed for uncoupling of the vibrational directions, showing that vibrational forces in the direction of gravity played the most important role in droplet shedding. The numerical studies also allowed for test cases that were difficult to accomplish with the experimental apparatus to be conducted. Visual condensation tests showed that the vibrations allowed for droplets to begin shedding earlier (i.e., 20 minutes on vibrating compared to 110 minutes on stationary surfaces) and at smaller diameters (e.g., 1 mm vs 5 mm). Experiments were conducted in an environmental chamber at 40 °C and 60% RH. Inside this chamber, condensation heat transfer experiments were conducted on stationary and vibrating hydrophobic surfaces. The condensation heat transfer coefficients of moist air measured in these experiments ranged from 100 to 150 W/m2K, with the average stationary heat transfer coefficient of 120 W/m2K and the average vibrating heat transfer coefficient of 130 W/m2K. Although the measured difference is modest, it shows that there is a possibility of this being a viable method to enhance condensation heat transfer. Further work is needed to improve the condensation rate of the apparatus in order to better understand the impacts and improvements vibrations have on the heat transfer coefficient.
Download or read book A Numerical Study of Spherical Droplet Vaporization in a High Pressure Environment written by Eric Warren Curtis and published by . This book was released on 1991 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 26th National Conference on Fluid Mechanics and Fluid Power written by B. Maiti and published by Allied Publishers. This book was released on 1999 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1977 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book A Numerical Study of Unsteady Conjugate Convective Heat Transfer in a Droplet written by Surya Denduluri and published by . This book was released on 1993 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Development Progress Report written by United States. Office of Saline Water and published by . This book was released on 1970 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Annual Meeting written by American Society of Mechanical Engineers and published by . This book was released on with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Condensation Heat Transfer written by P. J. Marto and published by . This book was released on 1979 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Study of Heat and Mass Transfer with Phase Change Condensation and Evaporation in a Developing Two dimensional Wall Jet Velocity and Temperature Fields written by R. Arman Dwiartono and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
