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Studies Of Bubble Growth And Departure From Artificial Nucleation Sites
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Book Synopsis Studies of Bubble Growth and Departure from Artificial Nucleation Sites by : Brian Katsuo Mori
Download or read book Studies of Bubble Growth and Departure from Artificial Nucleation Sites written by Brian Katsuo Mori and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Activation, Growth, and Detachment of Boiling Bubbles in Water from Artificial Nucleation Sites of Known Geometry and Size by : John R. Howell
Download or read book Activation, Growth, and Detachment of Boiling Bubbles in Water from Artificial Nucleation Sites of Known Geometry and Size written by John R. Howell and published by . This book was released on 1967 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Dynamics and Boiling Heat Transfer by : Samuel Siedel
Download or read book Bubble Dynamics and Boiling Heat Transfer written by Samuel Siedel and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since boiling heat transfer affords a very effective means to transfer heat, it is implemented in numerous technologies and industries ranging from large power generation plants to micro-electronic thermal management. Although having been a subject of research for several decades, an accurate prediction of boiling heat transfer is still challenging due to the complexity of the coupled mechanisms involved. It appears that the boiling heat transfer coefficient is intimately related to bubble dynamics (i.e. bubble nucleation, growth and detachment) as well as factors such as nucleation site density and interaction between neighbouring and successive bubbles. In order to contribute to the understanding of the boiling phenomenon, an experimental investigation of saturated pool boiling from a single or two neighbouring artificial nucleation sites on a polished copper surface has been performed. The bubble growth dynamics has been characterized for different wall superheats and a experimental growth law has been established. The interaction between successive bubbles from the same nucleation site has been studied, showing the bubble shape oscillations that can be caused by these interactions. The forces acting on a growing bubble has been reviewed, and a complete momentum balance has been made for all stages of bubble growth. The curvature along the interface has been measured, and indications concerning the mechanism of bubble detachment have been suggested. The rise of bubble after detachment has been investigated, and the maximum velocity reached before a change of direction has been estimated and compared to existing models from the literature. The interaction between bubbles growing side by side has been studied: the generation and propagation of a wave front during the coalescence of two bubbles has been highlighted. As boiling heat transfer enhancement techniques are being imagined and developed, this study also focuses on the electrohydrodynamic enhancement technique. Boiling experiments have been performed in the presence of electric fields, and their effects on heat transfer and bubble dynamics have been characterized. Although the volume of the bubbles at detachment and the relationship between the bubble frequency and the wall superheat were not affected, the bubble growth curve was modified. The bubbles were elongated in the direction of the electric field, and this elongation was estimated and compared to other studies from the literature. The rising velocity of the bubble was reduced in the presence of electric field, and the behaviour of bubbles growing side by side was modified, the electric field causing the bubbles to repeal each other. These results, obtained in a fully controlled environment, provide compelling evidence that electric fields can be implemented to alter the bubble dynamics and subsequently heat transfer rates during boiling of dielectric fluids.
Book Synopsis Forces Acting on Bubbles in Nucleate Boiling Under Normal and Reduced Gravity Conditions by : Edward G. Keshock
Download or read book Forces Acting on Bubbles in Nucleate Boiling Under Normal and Reduced Gravity Conditions written by Edward G. Keshock and published by . This book was released on 1964 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nucleate Boiling Bubble Growth and Departure by : Bogumil E. Staniszewski
Download or read book Nucleate Boiling Bubble Growth and Departure written by Bogumil E. Staniszewski and published by . This book was released on 1959 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Growth in Nucleate Boiling of a Binary Mixture by : James Edwin Benjamin
Download or read book Bubble Growth in Nucleate Boiling of a Binary Mixture written by James Edwin Benjamin and published by . This book was released on 1960 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Activation, Growth, and Detachment of Boiling Bubbles in Water from Artificial Nucleation Sites of Known Geometry and Size by : John R. Howell
Download or read book Activation, Growth, and Detachment of Boiling Bubbles in Water from Artificial Nucleation Sites of Known Geometry and Size written by John R. Howell and published by . This book was released on 1967 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Nucleation and Dynamics by : Ho-young Kwak
Download or read book Bubble Nucleation and Dynamics written by Ho-young Kwak and published by . This book was released on 2020-04-21 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: For phenomena involving bubble nucleation, the molecular cluster model is used to predict the tensile strength and superheat limit of liquids and the amount of decompression for gaseous bubble nucleation in supersaturated solutions. The book investigates various gaseous bubble nucleation events including the bubble formation in gas-water solutions, CO bubble formation in iron melts, the formation of microcellular foams in polymers, the nucleation of nano-sized H2O bubbles in rhyolite melts, and bubble nucleation in shear flow fields. The book also investigates vaporous bubble nucleation events such as bubble formation on a cavity-free surface and inside a solid nanopore in 3M NaCl solution, superheat limit of liquids, and bubble nucleation near the absolute zero temperature by quantum tunnelling in liquid helium. For bubble dynamics phenomena, a set of homologous solutions of the Navier-Stokes equations for evolving spherical bubbles are used to treat gaseous bubble growth in organic solutions, polymer solutions, and in viscous rhyolitic melts. The growth and collapse of laser-induced vapor bubbles in liquid, and on solid particles is discussed as an example of homologous motion of the spherical object. Sonoluminescence phenomena in water and in sulfuric acid solutions, the pressure and shock wave propagation in bubbly mixtures, the gravitational collapse of Newtonian stars, and the core collapse of supernovas are also treated using these homologous solutions. The motion of a fire-ball generated by a TNT explosion underwater is obtained using a zero gravitational constant in the equation of motion for Newtonian stars.
Book Synopsis Studies on bubble growth in nucleate boiling by : Maury Saddy
Download or read book Studies on bubble growth in nucleate boiling written by Maury Saddy and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Nucleation from Heated Glass Cavities by : Joel Richard Schapira
Download or read book Bubble Nucleation from Heated Glass Cavities written by Joel Richard Schapira and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behavior of bubbles nucleating from a glass cavity was studied using high speed photography. Water and ethanol were used with varying amounts of cavity heat at several subatomospheric pressures. Bubble growth, departure diameter, and frequency were related to the fluid used, cavity heat, operating pressure and local convection currents. At low pressures, the departure diameter was studied for dynamic effects. The frequency-departure diameter product was observed for increasing bubble frequency.
Book Synopsis A Photographic Investigation of Bubble Nucleation from Artificial Cavities by : John Christian Eller
Download or read book A Photographic Investigation of Bubble Nucleation from Artificial Cavities written by John Christian Eller and published by . This book was released on 1968 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: High speed motion pictures of bubble nucleation from glass capillaries were obtained. The fluids used were: distilled water, water with wetting agent, water with sucrose, and ethanol. Capillaries of cylindrical, conical, and reentrant geometries were used with inner diameters ranging from .0182 to .0381 inches. The penetration of the liquid-vapor interface into a cavity after bubble departure appeared to be inertia controlled. Cavity interior geometry and cleanliness had a direct effect upon the liquid-vapor interface penetration distance. The depth of penetration of the interface increased as cavity size increased. Viscosity reduced the interface penetration. Bubble growth curves were obtained for a typical bubble in each fluid. Bubble departure diameter appeared to be independent of cavity geometry but increased as cavity size increased. Viscosity retarded bubble growth during the initial stages of growth. (Author).
Download or read book NASA Technical Note written by and published by . This book was released on 1967 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nucleation and Bubble Growth from Artificial Cavities in a Field of Known Initial Temperature Distribution by : Robert R. Schultz
Download or read book Nucleation and Bubble Growth from Artificial Cavities in a Field of Known Initial Temperature Distribution written by Robert R. Schultz and published by . This book was released on 1973 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Photographic Investigation of Bubble Nucleation from Artificial Cavities by :
Download or read book A Photographic Investigation of Bubble Nucleation from Artificial Cavities written by and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High speed motion pictures of bubble nucleation from glass capillaries were obtained. The fluids used were: distilled water, water with wetting agent, water with sucrose, and ethanol. Capillaries of cylindrical, conical, and reentrant geometries were used with inner diameters ranging from .0182 to .0381 inches. The penetration of the liquid-vapor interface into a cavity after bubble departure appeared to be inertia controlled. Cavity interior geometry and cleanliness had a direct effect upon the liquid-vapor interface penetration distance. The depth of penetration of the interface increased as cavity size increased. Viscosity reduced the interface penetration. Bubble growth curves were obtained for a typical bubble in each fluid. Bubble departure diameter appeared to be independent of cavity geometry but increased as cavity size increased. Viscosity retarded bubble growth during the initial stages of growth. (Author).
Download or read book NASA Technical Memorandum written by and published by . This book was released on with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bubble Nucleation Site Distributions Based on Cross Correlation Studies of Surface Temperature Fluctuations by : Dennis Chien Hwa Chao
Download or read book Bubble Nucleation Site Distributions Based on Cross Correlation Studies of Surface Temperature Fluctuations written by Dennis Chien Hwa Chao and published by . This book was released on 1976 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1980 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: