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Film Boiling From Spheres In Single And Two Phase Flow
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Book Synopsis Film Boiling from Spheres in Single- and Two-phase Flow by :
Download or read book Film Boiling from Spheres in Single- and Two-phase Flow written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental data on film boiling heat transfer from single, inductively heated, spheres in single- and two-phase flow (saturated water and steam, respectively) are presented. In the single-phase-flow experiments water velocities ranged from 0.1 to 2.0 m/s; in the two-phase-flow experiments superficial water and steam velocities covered 0.1 to 0.6 m/s and 4 to 10 m/s, respectively. All experiments were run at atmospheric pressure and with sphere temperatures from 900C down to quenching. Limited interpretations of the single-phase- flow data are possible, but the two-phase-flow data are new and unique.
Book Synopsis Film Boiling on Spheres in Single- and Two-phase Flows by :
Download or read book Film Boiling on Spheres in Single- and Two-phase Flows written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Film boiling on spheres in single- and two-phase flows was studied experimentally and theoretically with an emphasis on establishing the film boiling heat transfer closure law, which is useful in the analysis of nuclear reactor core melt accidents. Systematic experimentation of film boiling on spheres in single-phase water flows was carried out to investigate the effects of liquid subcooling (from 0 to 40 C), liquid velocity (from 0 to 2 m/s), sphere superheat (from 200 to 900 C), sphere diameter (from 6 to 19 mm), and sphere material (stainless steel and brass) on film boiling heat transfer. Based on the experimental data a general film boiling heat transfer correlation is developed. Utilizing a two-phase laminar boundary-layer model for the unseparated front film region and a turbulent eddy model for the separated rear region, a theoretical model was developed to predict the film boiling heat transfer in all single-phase regimes. The film boiling from a sphere in two-phase flows was investigated both in upward two-phase flows (with void fraction from 0.2 to 0.65, water velocity from 0.6 to 3.2 m/s, and steam velocity from 3.0 to 9.0 m/s) and in downward two-phase flows (with void fraction from 0.7 to 0.95, water velocity from 1.9 to 6.5 m/s, and steam velocity from 1.1 to 9.0 m/s). The saturated single-phase heat transfer correlation was found to be applicable to the two-phase film boiling data by making use of the actual water velocity (water phase velocity), and an adjustment factor of (1 -[alpha])[sup 1/4] (with a being the void fraction) for downward flow case only. Slight adjustments of the Reynolds number exponents in the correlation provided an even better interpretation of the two-phase data. Preliminary experiments were also conducted to address the influences of multi-sphere structure on the film boiling heat transfer in single- and two-phase flows.
Book Synopsis Film Boiling on Spheres in Single- and Two-phase Flows. Final Report by :
Download or read book Film Boiling on Spheres in Single- and Two-phase Flows. Final Report written by and published by . This book was released on 1994 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Film boiling on spheres in single- and two-phase flows was studied experimentally and theoretically with an emphasis on establishing the film boiling heat transfer closure law, which is useful in the analysis of nuclear reactor core melt accidents. Systematic experimentation of film boiling on spheres in single-phase water flows was carried out to investigate the effects of liquid subcooling (from 0 to 40°C), liquid velocity (from 0 to 2 m/s), sphere superheat (from 200 to 900°C), sphere diameter (from 6 to 19 mm), and sphere material (stainless steel and brass) on film boiling heat transfer. Based on the experimental data a general film boiling heat transfer correlation is developed. Utilizing a two-phase laminar boundary-layer model for the unseparated front film region and a turbulent eddy model for the separated rear region, a theoretical model was developed to predict the film boiling heat transfer in all single-phase regimes. The film boiling from a sphere in two-phase flows was investigated both in upward two-phase flows (with void fraction from 0.2 to 0.65, water velocity from 0.6 to 3.2 m/s, and steam velocity from 3.0 to 9.0 m/s) and in downward two-phase flows (with void fraction from 0.7 to 0.95, water velocity from 1.9 to 6.5 m/s, and steam velocity from 1.1 to 9.0 m/s). The saturated single-phase heat transfer correlation was found to be applicable to the two-phase film boiling data by making use of the actual water velocity (water phase velocity), and an adjustment factor of (1-[alpha])14 (with [alpha] being the void fraction) for downward flow case only. Slight adjustments of the Reynolds number exponents in the correlation provided an even better interpretation of the two-phase data. Preliminary experiments were also conducted to address the influences of multisphere structure on the film boiling heat transfer in single- and two-phase flows.
Book Synopsis Film Boiling on Spheres in Single- and Two-phase Flows by : Changchun Liu
Download or read book Film Boiling on Spheres in Single- and Two-phase Flows written by Changchun Liu and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Film Boiling from Submerged Spheres by : Robert C. Hendricks
Download or read book Film Boiling from Submerged Spheres written by Robert C. Hendricks and published by . This book was released on 1969 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Film Boiling from Spheres - A Comparison of Theory and Data at Standard and Reduced Gravity by : Robert C. Hendricks
Download or read book Film Boiling from Spheres - A Comparison of Theory and Data at Standard and Reduced Gravity written by Robert C. Hendricks and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Model Laws for the Transition from Nucleate to Film Boiling with Forced Convection by : Ottomar Kampfenkel
Download or read book Model Laws for the Transition from Nucleate to Film Boiling with Forced Convection written by Ottomar Kampfenkel and published by . This book was released on 1978 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Film Boiling from Small Spheres and the Use of Minimum Film Boiling Temperature in the Modeling of Vapor Explosions by : Chunkuan Shih
Download or read book On the Film Boiling from Small Spheres and the Use of Minimum Film Boiling Temperature in the Modeling of Vapor Explosions written by Chunkuan Shih and published by . This book was released on 1978 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Film Boiling by : J. C. Carter
Download or read book The Effect of Film Boiling written by J. C. Carter and published by . This book was released on 1952 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This preliminary work tries to present evidence that a boiling film has the characteristics of boundary layer phenomenon by showing how the principal variables affect polytropic forced flow.
Book Synopsis A Correlation of Film-boiling Heat-transfer Coefficients Obtained with Hydrogen, Nitrogen, and Freon 113 in Forced Flow by : U. Von Glahn
Download or read book A Correlation of Film-boiling Heat-transfer Coefficients Obtained with Hydrogen, Nitrogen, and Freon 113 in Forced Flow written by U. Von Glahn and published by . This book was released on 1964 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two-Phase Heat Transfer by : Mirza Mohammed Shah
Download or read book Two-Phase Heat Transfer written by Mirza Mohammed Shah and published by John Wiley & Sons. This book was released on 2021-03-04 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to two-phase heat transfer theory, practice, and applications Designed primarily as a practical resource for design and development engineers, Two-Phase Heat Transfer contains the theories and methods of two-phase heat transfer that are solution oriented. Written in a clear and concise manner, the book includes information on physical phenomena, experimental data, theoretical solutions, and empirical correlations. A very wide range of real-world applications and formulas/correlations for them are presented. The two-phase heat transfer systems covered in the book include boiling, condensation, gas-liquid mixtures, and gas-solid mixtures. The authora noted expert in this fieldalso reviews the numerous applications of two-phase heat transfer such as heat exchangers in refrigeration and air conditioning, conventional and nuclear power generation, solar power plants, aeronautics, chemical processes, petroleum industry, and more. Special attention is given to heat exchangers using mini-channels which are being increasingly used in a variety of applications. This important book: Offers a practical guide to two-phase heat transfer Includes clear guidance for design professionals by identifying the best available predictive techniques Reviews the extensive literature on heat transfer in two-phase systems Presents information to aid in the design and analysis of heat exchangers. Written for students and research, design, and development engineers, Two-Phase Heat Transfer is a comprehensive volume that covers the theory, methods, and applications of two-phase heat transfer.
Book Synopsis Two-phase Flow and Heat Transfer in the Power and Process Industries by : A. E. Bergles
Download or read book Two-phase Flow and Heat Transfer in the Power and Process Industries written by A. E. Bergles and published by Hemisphere Pub. This book was released on 1981 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Low Speed Forced Flow and Subcooling on the Minimum Film Boiling Wall Superheat of Small Spheres by : Saeed Rezakhany
Download or read book Effect of Low Speed Forced Flow and Subcooling on the Minimum Film Boiling Wall Superheat of Small Spheres written by Saeed Rezakhany and published by . This book was released on 1983 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Understanding the Minimum Film Boiling Temperature in Two-phase Flow by : Juliana Pacheco Duarte
Download or read book Understanding the Minimum Film Boiling Temperature in Two-phase Flow written by Juliana Pacheco Duarte and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The post-critical heat flux (post-CHF) heat transfer is a complex two-phase flow phenomenon divided in two regions: a so-called 'transition boiling' regime characterized by the rapid degradation of heat transfer from a heated surface to a liquid/vapor mixture, and a so-called 'stable film boiling' regime characterized by heat transfer from the heated surface to the vapor. The limit between these two regimes is usually referred as the minimum film boiling temperature (TMFB), and has been interpreted as a temperature from which the liquid no longer can contact the heated surface. To better understand these phenomena, experiments were performed at LWR conditions in the High Pressure Heat Transfer Facility at the University of Wisconsin-Madison. These experiments and subsequent prototypic experiments from the KATHY facility, in Germany, contribute to the limited experimental database on this topic. KATHY data were collected under BWR conditions during Anticipate Transient Without Scram that leads to cycles of dryout and rewet events and ultimately to a failure to rewet of at least one thermocouple. The data were analyzed using a 2D inverse heat transfer computational tool to obtain the surface heat fluxes and temperatures during post-CHF. It was observed that the transition to the film boiling heat transfer regime is a hydrodynamic mechanism dependent on both the pressure and the mass flux, while the local quality affects the mechanism of film formation between a film dryout at high qualities and bubbles coalescence at low qualities. The homogeneous nucleation temperature, which is a thermodynamic mechanism, acts as a lower bound for this transition temperature. The analysis also quantifies different transient boiling curves for flow regimes that differ qualitatively and quantitatively from the typical boiling curve considered in steady-state two-phase heat transfer analysis. The results provide insights into boiling heat transfer and they can change the way we currently model the two-phase post-CHF.
Book Synopsis Film Boiling from Submerged Spheres by : Robert C. Hendricks
Download or read book Film Boiling from Submerged Spheres written by Robert C. Hendricks and published by . This book was released on 1969 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Film Boiling - Two Phase Flow by : David Julain Daniels
Download or read book Film Boiling - Two Phase Flow written by David Julain Daniels and published by . This book was released on 1965 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiphase Flow Dynamics 2 by : Nikolay Ivanov Kolev
Download or read book Multiphase Flow Dynamics 2 written by Nikolay Ivanov Kolev and published by Springer Science & Business Media. This book was released on 2005-08-15 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-phase flows are part of our natural environment such as tornadoes, typhoons, air and water pollution and volcanic activities as well as part of industrial technology such as power plants, combustion engines, propulsion systems, or chemical and biological industry. The industrial use of multi-phase systems requires analytical and numerical strategies for predicting their behavior. In its third extended edition this book contains theory, methods and practical experience for describing complex transient multi-phase processes in arbitrary geometrical configurations. This book provides a systematic presentation of the theory and practice of numerical multi-phase fluid dynamics. In the present second volume the mechanical and thermal interactions in multiphase dynamics are provided. This third edition includes various updates, extensions, improvements and corrections.
