Interphase momentum transfer in the flow of bubbles through nozzles. Topical report. [PWR; BWR]

Book · Thu Feb 01 00:00:00 EST 1979

OSTI ID:6149236

Kuo, J T; Wallis, G B; Richter, H J

One of the fundamental objectives in the mathematical modeling of two-phase flow is to understand and to formulate the interaction forces between two phases. For this purpose a simple and well-defined two-phase flow situation, flow of bubbles through nozzles, was set up in the laboratory. A range of liquid flow fields was set up by flowing water through nozzles. Individual bubbles were injected into the water stream and their trajectories were recorded to provide data for evaluation and comparison with theories. Because of limitations of the conventional photographic method of recording the bubble path, a computer based optical system was designed for fast data acquisition. The optical system works on the principle of the interruption of a light beam by a bubble passing between a collimated light source and a row of phototransistors. A mathematical model was set up to predict the bubble motion. Various forces included in the model are the drag force, the apparent mass force, the buoyancy force, the bubble expansion force and the history forces.

• Research Organization: Dartmouth Coll., Hanover, NH (USA). Thayer School of Engineering
• OSTI ID: 6149236
• Report Number(s): EPRI-NP-980; TRN: 79-011268
• Country of Publication: United States
• Language: English

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