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Sunday, August 9, 2020 | History

4 edition of Bubble and slug flow at microgravity conditions found in the catalog.

Bubble and slug flow at microgravity conditions

Bubble and slug flow at microgravity conditions

state of knowledge and open questions

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  • 1 Currently reading

Published by National Aeronautics and Space Administration in [Washington, D.C .
Written in English

    Subjects:
  • Reduced gravity environments,
  • Two-phase flow,
  • Fluid dynamics

  • Edition Notes

    Other titlesChemical engineering communications 0098-6445.
    StatementC. Colin and J. Fabre, J. McQuillen.
    SeriesNASA-CR -- 204558., NASA contractor report -- NASA CR-204558.
    ContributionsFabre, J., McQuillen, John B.
    The Physical Object
    FormatMicroform
    Pagination1 microfiche (22 fr.)
    Number of Pages22
    ID Numbers
    Open LibraryOL17604875M
    OCLC/WorldCa47442452

    Microgravity Research in Support of Technologies for the Human Exploration and Development National Research Council. Microgravity Research in Support of Technologies for the Human Exploration and Colin, C., J. Fabre, and A.E. Dukler. Gas-liquid flow at microgravity conditions I, dispersed bubble and slug flow. Int. Experimental Investigation of a Bubbly Two-Phase Flow in an Open Capillary Channel under Microgravity Conditions, Microgravity Sci. Tec. 22 Grah, A., Dreyer, M. E.

    This volume covers the modern developments in boiling heat transfer and two-phase flow, and is intended to provide industrial, government and academic researchers with state-of-the-art research findings in the area of multiphase flow and heat transfer technology. The ability to predict gas-liquid flow patterns is crucial to the design and operation of two-phase flow systems in the microgravity environment. Flow pattern maps have been developed in this study which show the occurrence of flow patterns as a function of gas and liquid superficial velocities as well as tube diameter, liquid viscosity and.

    Heat Transfer Research, Education and Practice in the UK organised by the UK Heat Transfer Committee Enhanced VOF- based direct numerical simulations of slug flow boiling within micro-channels with smooth and finned heated walls Chapter in Book/Conference proceeding with ISSN or ISBN › Conference contribution with ISSN or ISBN. Bubble. This volume comprises the proceedings of the 42nd National and 5th International Conference on Fluid Mechanics and Fluid Power held at IIT Kanpur in December, The conference proceedings encapsulate the best deliberations held during the conference. The diversity of participation in the.


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Bubble and slug flow at microgravity conditions Download PDF EPUB FB2

Gas-liquid flow at microgravity conditions—I. Dispersed bubble and slug flow Article (PDF Available) in International Journal of Multiphase Flow 17(4)– July with Reads. Get this from a library. Bubble and slug flow at microgravity conditions: state of knowledge and open questions.

[C Colin; J Fabre; John B McQuillen; United States. Duffar, in Encyclopedia of Materials: Science and Technology, 6 Summary and Future Directions.

Crystal growth under microgravity conditions is a year-old discipline. Through some hundred experiments, it has helped to investigate, and in several cases to solve, physical questions involved in the crystal growth processes. The effects of the nondimensional variables on bubble and drop size are evaluated in microgravity conditions.

In microgravity, the bubble is detached from the nozzle only by the liquid flow drag. A new set of experimental pressure drop air-water flow data at microgravity conditions obtained aboard the NASA KC aircraft is reported. Comparisons between pressure drop values at μ − g and 1 − g vertical upward flow suggest that the forced convection two-phase flow frictional pressure drop at microgravity is of the same order of, magnitude as that at normal gravity for otherwise the Cited by: A new method for calculating the adiabatic transition from slug to annular flow in a microgravity environment is presented.

The model is based on a physical balance of inertial and surface tension forces in a manner more physically meaningful than in typical. Flow Pattern Transition Models. Chapter. 1k Downloads; Part of the The Space Technology Library book series (SPTL, volume 19) Keywords Void Fraction Weber Number Microgravity Condition Slug Flow Bubble Flow These keywords were added by machine and not by the authors.

In fluid mechanics, multiphase flow is the simultaneous flow of materials with two or more thermodynamic phases. Virtually all processing technologies from cavitating pumps and turbines to paper-making and the construction of plastics involve some form of multiphase flow.

It is also prevalent in many natural phenomena. These phases may consist of one chemical component (e.g. flow of water and.

Then, fundamental studies of gas-liquid flow patterns and flow-pattern maps are presented. In the experimental context, studies of flow patterns and flow-pattern maps in macro- and microscale channels, across tube bundles, at diabatic and adiabatic conditions, under microgravity and in complex channels are by:   By means of visual observations of the two-phase flow through the test section, it was discovered that five different flow patterns occurred within the experimental parameter ranges, namely, bubbly flow, bubbly-slug flow, slug flow, slug-annular flow, and annular flow.

A correlation for the bubble and slug diameter in the packed beds was Cited by: 2. Several situations in which a spherical bubble experiences a lift force are examined, especially through the use of computational results obtained by solving the full Navier–Stokes equations.

The lift force is computed over a wide range of Reynolds number for the case Cited by: Bubble generation in a continuous liquid flow under gravity conditions. [Cleveland, Ohio]: Springfield, VA: National Aeronautics and Space Administration, Glenn Research Center ; National Technical Information Service, distributor.

MLA Citation. Pais, Salvatore Cezar. and NASA Glenn Research Center. The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injection flow rates on the slug generation, including the slug size, separation distance and slug generation cycle time, a transient numerical model of a cross Cited by: 1.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Experiments of gas–liquid flow in a circular pipe for horizontal and inclined positions (upward/downward) are reported.

The characteristics of two-phase flow in terms of liquid holdup (ε(L)) and induced flow patterns are studied using three experimental techniques; time-averaged ε(L) from permittivity profiles using electrical capacitance tomography (ECT), instantaneous ε(L) using Author: Zeyad Almutairi, Fayez M.

Al-Alweet, Yusif A. Alghamdi, Omar A. Almisned, Othman Y. Alothman. Abiev RS. Circulation and bypass modes of the slug flow of a gas–liquid mixture in capillaries. Theor Found Chem Eng ; – Abiev RS.

Method for calculating the void fraction and relative length of bubbles under slug flow conditions in capillaries. Theor Found Chem Eng. CRYOGENIC BOILING AND TWO-PHASE CHILLDOWN PROCESS UNDER TERRESTRIAL AND MICROGRAVITY CONDITIONS By Kun Yuan August Chair: Jacob N.

Chung Major Department: Mechanical and Aerospace Engineering Chilldown or quenching is a complicated process that initiates the cryogenic fluids transport, and it involves unsteady two-phase heat and mass transfer.

Enter search terms. Keep search filters New search. Advanced search. An important topic in fluid dynamics is multiphase flows. Multiphase flows can be found in numerous fields in engineering, e.g. aerospace, biomedical, chemical, electrical, environmental, mechanical, materials, nuclear and naval engineering.

There is an enormous variation in applications, e.g. rocket engines, chemical reactors, contamination spreading, multiphase mixture transport, cavitation.

“Physics of gas-liquid flows” is a must read for graduate students, researchers and engineers seeking a solid basis or wanting to update their knowledge in the dynamics of gas-liquid systems. The book is an authoritative reference, mainly built around the Bubble/foam regime 33 Flow at large gas and liquid velocities.

Full text of "NASA Technical Reports Server (NTRS) Proceedings of the Fifth Microgravity Fluid Physics and Transport Phenomena Conference" See other formats.Each type of flow is the subject of a chapter in this volume.

We consider first, in Chapter 1, the question of the generation of environments biphasic individuals: dusty gas, mist, bubble flow. Chapter 2 is devoted to the study at the mesoscopic scale: particle-fluid exchange of momentum and heat with determination of the respective exchange.Cryogenic Two-Phase Flow and Phase-Change Heat Transfer in Microgravity Item menu.