Two Phase Flow about a Stagnation Point in Film Boiling PDF Download
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Author: W. H. Gallaher Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
The analysis of film boiling of a saturated liquid about the stagnation point is presented. From this first approach macroscopic flow, an expression for the vapor layer thickness, maximum vapor velocity, and heat transfer was obtained. The effects of hydrostatic pressure gradients and radius of curvature are included. The expression for heat transfer is compared to measurement in saturated liquid nitrogen. (Author).
Author: W. H. Gallaher Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
The analysis of film boiling of a saturated liquid about the stagnation point is presented. From this first approach macroscopic flow, an expression for the vapor layer thickness, maximum vapor velocity, and heat transfer was obtained. The effects of hydrostatic pressure gradients and radius of curvature are included. The expression for heat transfer is compared to measurement in saturated liquid nitrogen. (Author).
Author: Mirza Mohammed Shah Publisher: John Wiley & Sons ISBN: 1119618673 Category : Science Languages : en Pages : 388
Book Description
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.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
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.
Author: W. H. Gallaher
Author: W. H. Gallaher
Author: David Julain Daniels
Author: G. Hetsroni
Author: Gad Hetsroni
Author: University of Exeter. Dept. of Chemical Engineering
Author: Mirza Mohammed Shah
Author: P. M. C. Lacey
Author: 
Author: 
Author: Sadik Kakaç