Journal ArticleDOI
Countercurrent bubble and slug flows in a vertical system
TLDR
In this paper, a model for estimating void fraction in countercurrent bubbly and slug flows in vertical systems, based on the drift-flux approach, is presented, and the parameter C 0 in the countercurrent bubble flow is 2.0, a value much higher than the generally accepted one of 1.2 for cocurrent flow.About:
This article is published in Chemical Engineering Science.The article was published on 1994-08-01. It has received 11 citations till now. The article focuses on the topics: Slug flow & Countercurrent exchange.read more
Citations
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Journal ArticleDOI
A model on water level dynamics in natural circulation drum-type boilers
Han-Gon Kim,Sang-Min Choi +1 more
TL;DR: In this article, a model for water level dynamics in the drum-riser-downcomer loop of a natural circulation drum-type boiler is presented based on basic conservation rules of mass, momentum, and energy, together with well-known constitutional equations.
Journal ArticleDOI
Annular Gap Bubble Column: Experimental Investigation and Computational Fluid Dynamics Modeling
TL;DR: In this paper, the authors investigated the countercurrent gas-liquid flow in an annular gap bubble column with a 0.24 m inner diameter by using experimental and numerical investigations, and showed that the errors in the global holdup and in the local properties are below 7% and 16%, respectively, in the range considered.
Journal ArticleDOI
Tomographic imaging of counter-current bubbly flow by wire mesh tomography
TL;DR: In this article, the authors investigated the characteristics of counter-current bubblebly flow in a circular pipe with an inner diameter of 50mm by using wire mesh tomography (WMT), and the accuracy of WMT on void fraction measurement is also clarified by comparing the result with a nonintrusive optical method.
A new model for two-phase oilwater flow : production log interpretation and tubular calculations
A.R. Hasan,C. Shah Kabir +1 more
TL;DR: In this paper, a methode proposee, developpee a partir du principe de derive de flux, s'appuie sur des donnees experimentales et bibliographiques, ses avantages par rapport aux autres methodes sont discutees.
Journal ArticleDOI
Countercurrent gas/liquid flow and mixing : Implications for water disinfection
TL;DR: In this article, a multiphase computational fluid dynamics (CFD) model was used to simulate the flow in the bubble column and to gain insights into the fluid dynamics of countercurrent flow bubble columns.
References
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Journal ArticleDOI
Average volumetric concentration in two-phase flow systems
Novak Zuber,J. A. Findlay +1 more
Journal ArticleDOI
Velocity of large drops and bubbles in media of infinite or restricted extent
TL;DR: In this paper, a simple method of calculating the terminal velocity of fluid particles moving in media of either infinite or restricted extent was proposed. But this method was not suitable for the case of liquid drops falling through gaseous media and gave only a rough approximation.
Journal ArticleDOI
Hydrodynamic model for gas‐liquid slug flow in vertical tubes
TL;DR: A series of equations based on the physical processes thought to take place during slug flow were developed in this paper to predict the hydrodynamic character of this complex flow pattern, which appeared to validate the model.
Journal ArticleDOI
Gas hold-up in bubble columns
TL;DR: In this paper, a dimensionless correlation for the fractional gas hold-up in a 10 cm I.D. bubble column with a single-nozzle gas sparger was presented and shown to correlate the experimental data with an average deviation of 4.2%.
Journal ArticleDOI
Two-phase flow in vertical and inclined annuli
A.R. Hasan,C.S. Kabir +1 more
TL;DR: In this article, the drift-flux approach is adapted to estimate void fraction during upward cocurrent two-phase flow in annuli, and the predictions of the proposed method for flow pattern transition and void fraction are compared with experimental data gathered for this work as well as from independent sources.
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