An Experimental Investigation of Liquid-solid Two-phase Pipe Flow by Simultaneous, Two-color Digital Particle Image Velocimetry-accelerometry PDF Download
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Author: Joseph F. Borowsky
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
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Author: Joseph F. Borowsky
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 768
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Author: John Martin Cegielski
Publisher:
ISBN:
Category : Pipe
Languages : en
Pages : 238
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Afshin J. Ghajar
Publisher: Springer Nature
ISBN: 3030416267
Category : Science
Languages : en
Pages : 136
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Book Description
This book provides design engineers using gas-liquid two-phase flow in different industrial applications the necessary fundamental understanding of the two-phase flow variables. Two-phase flow literature reports a plethora of correlations for determination of flow patterns, void fraction, two- phase pressure drop and non-boiling heat transfer correlations. However, the validity of a majority of these correlations is restricted over a narrow range of two -phase flow conditions. Consequently, it is quite a challenging task for the end user to select an appropriate correlation/model for the type of two-phase flow under consideration. Selection of a correct correlation also requires some fundamental understanding of the two-phase flow physics and the underlying principles/assumptions/limitations associated with these correlations. Thus, it is of significant interest for a design engineer to have knowledge of the flow patterns and their transitions and their influence on two-phase flow variables. To address some of these issues and facilitate selection of appropriate two-phase flow models, this volume presents a succinct review of the flow patterns, void fraction, pressure drop and non-boiling heat transfer phenomenon and recommend some of the well scrutinized modeling techniques.
Author: S. William Gouse
Publisher:
ISBN:
Category : Two-phase flow
Languages : en
Pages : 890
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Author: William Daniel Schmidl
Publisher:
ISBN:
Category :
Languages : en
Pages : 326
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Author: Martin Neumann-Kipping
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Author: Younghoon Kwak
Publisher:
ISBN:
Category : Microfluidics
Languages : en
Pages : 334
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Book Description
Two-phase gas-liquid flows in microscale fractal-like branching channel flow networks were experimentally studied to assess the validity of existing void fraction correlations and flow regimes based on superficial gas and liquid velocities. Void fractions were assessed using two different methods. First, void fraction data were acquired using a High-Speed-High-Resolution (HSHR) camera and computed by area-based two-dimensional image analysis. Void fraction data were also computed using a slip ratio, defined as gas velocity over liquid velocity. Liquid velocity represents the bulk-averaged liquid velocity as determined by microscale particle image velocimetry (micro-PIV). Gas velocity was determined by averaging gas-liquid interface velocities made at the channel centerline. The fractal-like branching channel flow network has five bifurcation levels of different channel widths varying from 400 [mu]m to 100 [mu]m with a fixed channel depth of 250 [mu]m. Each downstream width decreases by 30% whereas the downstream lengths increase by 40%. The total flow length through a single path is approximately 18 mm. Filtered air and deionized water were used as the gas and liquid working fluids, respectively. Mass flow rates of air and water into each k=0 branch were varied from 0.3 g/min to 2.5 g/min and from 5.2x10−5 g/min to 1.3x10−2 g/min, respectively. These flow rates yielded superficial air and water velocities through the same branch level between 0.007 m/s and 1.8 m/s and between 0.05 m/s and 0.42 m/s, respectively. For each branching level, due to an increase in flow area, the superficial liquid and gas flow rates change. A two-phase flow regime map was generated for each level of the fractal-like branching flow network and compared to maps developed using the Taitel and Dukler (1976) model and to maps presented in Chung and Kawaji (2004). Flow regime transitions are well predicted with the Taitel and Dukler (1976) model for each branching level. Void fraction assessed using the slip ratio shows very good agreement with the homogeneous void fraction model for all branching levels. On the other hand, void fraction determined by area-based two-dimensional image analysis shows better agreement with the void fraction correlation of Zivi (1964).
Author: Karen L. Burch
Publisher:
ISBN:
Category :
Languages : en
Pages : 244
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