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Friday, July 24, 2020 | History

4 edition of Studies of two-phase gas-liquid flow in microgravity found in the catalog.

Studies of two-phase gas-liquid flow in microgravity

William Scott Bousman

Studies of two-phase gas-liquid flow in microgravity

by William Scott Bousman

  • 98 Want to read
  • 34 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C.], [Springfield, Va .
Written in English


Edition Notes

Other titlesStudies of two phase gas liquid flow in microgravity.
StatementWilliam Scott Bousman.
SeriesNASA contract report -- 195434., NASA contractor report -- NASA CR-195434.
ContributionsUnited States. National Aeronautics and Space Administration.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17012578M
OCLC/WorldCa33210273

Book Description. The Multiphase Flow Handbook, Second Edition is a thoroughly updated and reorganized revision of the late Clayton Crowe’s work, and provides a detailed look at the basic concepts and the wide range of applications in this important area of thermal/fluids engineering. Revised by the new editors, Efstathios E. (Stathis) Michaelides and John D. Schwarzkopf, the . Sadhan¯ ¯a Vol. 38, Part 6, December , pp. – c Indian Academy of Sciences Entrainment phenomenon in gas–liquid two-phase flow: A review R K BAGUL1,2, D S PILKHWAL1,PKVIJAYAN1,2 and JBJOSHI2,3,∗ 1Reactor Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai , India.

Adedigba, A. G. O. (), ―Two-phase flow of gas-liquid mixtures in horizontal helical pipes‖, Doctor of Philosophy Thesis, Cranfield Institute of Technology, Cranfield, UK. [3]. Cambridge Core - Thermal-Fluids Engineering - Two-Phase Flow, Boiling, and Condensation - by S. Mostafa GhiaasiaanAuthor: S. Mostafa Ghiaasiaan.

In fluid mechanics, two-phase flow is a flow of gas and liquid — a particular example of multiphase -phase flow can occur in various forms, such as flows transitioning from pure liquid to vapor as a result of external heating, separated flows, and dispersed two-phase flows where one phase is present in the form of particles, droplets, or bubbles in a continuous carrier . In these experiments, about 70 to 80 % of all the liquid phase could be extracted from incoming gas-liquid two-phase flow by Y-junction under microgravity. 4. Conclusions As the gas/liquid phase separator under microgravity condition, the method of a Y-junction was proposed and tested under microgravity condition.


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Studies of two-phase gas-liquid flow in microgravity by William Scott Bousman Download PDF EPUB FB2

Get this from a library. Studies of two-phase gas-liquid flow in microgravity. [William Scott Bousman; United States.

National Aeronautics and Space Administration.]. Two-phase gas-liquid flows are expected to occur in many future space operations.

Due to a lack of buoyancy in the microgravity environment, two-phase flows are known to behave differently than those in earth gravity. Despite these concerns, little research has been conducted on microgravity two-phase flow and the current understanding is poor.

FUNDAMENTAL STUDIES ON TWO-PHASE GAS-LIQUID FLOWS THROUGH PACKED BEDS IN MICROGRAVITY Vemuri Balakotaiah University of Houston Mark J.

McCready University of Notre Dame Brian J. Motil NASA Glenn Research Center ABSTRACT In the typical operation of a packed-bed reactor, gas and liquid flow simultaneously through a fixed bed of solid particles. A reduced gravity environment (or "microgravity"), provides an excellent tool to study the flow without the masking effects of gravity.

This book presents for the first time a comprehensive coverage of all aspects of two-phase flow behaviour in the virtual absence of gravity. For the definition of two-phase frictional multipliers and Lockhart-Martinelli parameter (X) in liquid-liquid flow, the liquid with higher density is used similar to the liquid phase in gas-liquid two-phase flow while the liquid with lower density is used similar to the gas phase in gas-liquid two-phase flow (Awad and Butt (a)).Cited by: 9.

Bengt Sundén, Juan Fu, in Heat Transfer in Aerospace Applications, Two-Phase Flow Measurements. Two-phase flows under microgravity conditions appear in a large number of important applications in fluid handling and storage and in spacecraft thermal and power systems (e.g., condensers, evaporators, piping system).

The physics of this ubiquitous flow is. Separating gas-liquid two-phase flow is of practical importance for many space engineering systems. While droplet and bubble removal is a naturally occurring phenomenon in most terrestrial situations, the absence of buoyancy in a microgravity environment often results in situations where two disparate phases have no distinct inclination to separate from one by: 3.

Microgravity fluid physics is an important part of microgravity sciences, which consists of simple fluids of many new systems, gas-liquid two-phase flow. Two-phase flow pressure-drop results at microgravity Two-Phase Flow at Microgravity (7) the sampling rate was the highest, and the data covered the widest range of liquid and gas mass flow rates (the gas quality x ranged from 4x toapproximately).

Post flight'94 ground data were collected at the same flow by: In addition, two-phase flows exist in a wide range of applications and enabling technologies in space. This report outlines recent progress in the studies of gas-liquid two-phase flows at microgravity conditions, especially for which regarding to interfacial area transport and drift : Tomoji Takamasa, Takashi Hibiki.

Gas - Liquid two-phase flow through packed beds in microgravity Article in AIChE Journal 49(3) - March with 78 Reads How we measure 'reads'. Experimental studies have been performed for horizontal two-phase air-water flows at normal and reduced gravity conditions in a square cross-section channel.

The experiments at reduced gravity are conducted on board the Russian IL reduced gravity by: Two-Phase Gas/Liquid Pipe Flow Ron Darby PhD, PE Values given by manufacturer, or in the “Red Book” If flow is choked (critical) use: d,gas If flow is not choked (sub -critical) use: d,liquid K K d K.

for Two-Phase Gas/Liquid Flow”, Proceedings of the Process Plant. Specific examples of research topics that should be pursued are (1) the identification of low-gravity flow regimes, the mechanisms that govern the effects of gravity, and interracial and bulk constitutive laws for specific flow regimes through experiments and the synergistic development of computer- modeling capabilities; (2) assessment of the.

The latter considers the two-phase to be artificially separated into two streams, each flowing in its own pipe, with the assumption that the velocity of each phase is constant in /$ Ó COSPAR. Published by Elsevier Ltd. All rights References: Bousman, W.S. Studies of two-phase gas–liquid flow in microgravity.

A reduced - or microgravity - environment provides an excellent tool for accurate study of the flow without the masking effects of gravity. This book presents for the first time a comprehensive coverage of all aspects of two-phase flow. Gas–liquid two‐phase flow through packed beds in microgravity.

Brian J. Motil. Corresponding Author. NASA Glenn Research Center, Cleveland, OH NASA Glenn Research Center, Cleveland, OH Search for more papers by this author.

Vemuri Balakotaiah. Mucus transport by two-phase gas-liquid flow mechanism was investigated with in vitro flow models under asymmetric periodic airflow conditions with nine different liquid solutions with rheological properties similar to human sputum.

The flow model was made with cm-ID glass tube and positioned either vertically or by: The features of two-phase flow patterns and flow-pattern maps at adiabatic and diabatic conditions are reviewed, including recent studies for ammonia, new refrigerants, and C O 2 ⁠.

Then, fundamental studies of gas-liquid flow patterns and flow-pattern maps are by: 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. Mist Flow – Vertical Tubes. Mist flow is a flow regime of two-phase gas-liquid occurs at very high flow rates and very high flow conditions causes, that liquid film flowing on the channel wall is thinned by the shear of the gas core on .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.Toward a Microgravity Research Strategy (Appendix D) Flow of Multiphase Fluids Multiphase fluids, such as bubbly gases and solid-laden slurries, form the class of perhaps the most industrially important liquids.