A PHOTOGRAPHIC STUDY OF BOILING FLOW
S>A high speed motion picture study was conducted of boiling flow in a vertical, rectangular channel at atmospheric pressure. Three different visual flow regimes were defined and described. These were: bubble flow, coalescing flow, and slug-annular flow. Photographs are presented of all these regimes. An original technique for measuring two-phase flow velocities was developed, and velocity measurements were made in all the flow regimes listed above. These measurements indicated the presence of substantial liquid superheating in the bubble and coalescing flow regimes and also provided part of the basis for the development of a model for slug-annular flow. A quantity denoted as flow pattern scale was defined and measured. This quantity is, essentiaily, a measure of the characteristic size of the vapor and liquid volumes composing a flow pattern. It was found that the different flow regimes could be quantitatively characterized by means of the scale values associated with them. A model for slug-annular flow was advanced, based on velocity measurements and study of the motion pictures of the flow. Pressure gradients predicted on the basis of this model were found to agree very well with measured values. (auth) H03 H0212318 A study was made of the literature on heat transfer by liquid metals under forced-convection conditions. Theoretical and experimental work dealing with several of the most important heat transfer configurations is described and discussed. Recommendations are made as to the most appropriate heat transfer relationships for use in design calculations. (auth)
- Research Organization:
- Columbia Univ., New York
- DOE Contract Number:
- AT(30-3)-187
- NSA Number:
- NSA-18-012316
- OSTI ID:
- 4103525
- Report Number(s):
- NYO-9650
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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