Download Advances in Two-Phase Flow and Heat Transfer: Fundamentals by Efstathios E. Michaelides (auth.), S. Kakaç, M. Ishii (eds.) PDF

By Efstathios E. Michaelides (auth.), S. Kakaç, M. Ishii (eds.)

Over the earlier twenty years, two-phase circulation and warmth move difficulties linked to two-phase phenomena were a problem to many investigators. Two-phase stream purposes are present in a variety of engineering structures, corresponding to nuclear and traditional energy crops, evaporators of refrigeration structures and a large vari­ ety of evaporative and condensive warmth exchangers within the chemical undefined. This book is predicated at the invited lectures provided on the NATO complicated study Workshop at the Advances in Two-Phase movement and warmth move. The Horkshop was once attended through greater than 50 best scientists and practising engineers who paintings actively on two-phase circulate and warmth move examine and purposes in dif­ ferent sectors (academia, executive, undefined) of member nations of NATO. a few clinical leaders and specialists at the material from the non-NATO international locations have been additionally invited. They convened to debate the cutting-edge in two-phase circulation and warmth move and formulated options for destiny examine instructions. to accomplish those targets, invited key papers and a restricted variety of contributions have been awarded and mentioned. the categorical facets of the topic have been handled intensive within the panel classes, and the unresolved difficulties pointed out. compatible as a pragmatic reference, those volumes contain a scientific method of two-phase movement analysis.

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35 mm and 140 mm in diameter. Liquid entered from the top of the tube either by overflowing a weir or by running down a tapered funnel. Measurements were made of the air and water flows. Kusuda and Imura [35] performed experiments to determine the critical heat flux in an open two-phase thermosyphon. They confirmed that dryout occurs only with counter-current annular twophase flow as a result of flooding rather than local film boiling. 4 mm in diameter. 7 mm in diameter. Wallis and Kuo [67] performed flooding designed to study the interfacial effects of flooding.

11 The non-dimensional velocity V/V o is given as a function of the distance x/L o 8. REMARKS The deduction shown in this report are based on simple applications of the non-steady Bernoulli equation for pipe flow. To an astonishing degree they represent realities as they can be observed in the laboratory. The break-down of liquid plugs and the transition to churn flow seems to be well explained. The necessary analytic basis for linking together a series of plugs seems to be present. However, it is an observation from the film accompanying this report that the lengths of the plugs are not deterministicly defined, nor is their velocity or spacing.

The published literature on flooding includes both analytical and experimental work. For simplicity, the experimental aspects of flooding will be presented separately. The analytical aspects of the experimental works will be included with the purely analytical works. 507 ttt GAS RIPPLES DISTURBANCE WAVE Figure 1. 3. Typical Flooding Profile EXPERIMENTS 'Flooding has been studied experimentally in a variety of geometries, with several sets of fluid pairs, and over a range of flowrates for both liquid and gas.

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