Group Title: 7th International Conference on Multiphase Flow - ICMF 2010 Proceedings
Title: P2.18 - Periodic Void Fraction Waves in Gas-Liquid Cocurrent UpFlow: A Numerical Study
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Permanent Link: http://ufdc.ufl.edu/UF00102023/00485
 Material Information
Title: P2.18 - Periodic Void Fraction Waves in Gas-Liquid Cocurrent UpFlow: A Numerical Study Bubbly Flows
Series Title: 7th International Conference on Multiphase Flow - ICMF 2010 Proceedings
Physical Description: Conference Papers
Creator: Das, A.K.
Das, P.K.
Publisher: International Conference on Multiphase Flow (ICMF)
Publication Date: June 4, 2010
 Subjects
Subject: void fraction wave
two fluid model
population balance equation
 Notes
Abstract: Hybrid population balance-two fluid model is used to investigate the propagation of void fraction waves in a flowing two phase mixture. The constitutive equations of each phase are developed based on the volume average properties of the phase. The total population of bubbles in a control volume is discretized into subgroups based on volume. Coalescence of two similar or different sized bubbles and homogeneous and non homogeneous binary break up of a bubble has been considered in the population balance model. The void fraction at the inlet is perturbed by a continuous square wave for two different frequencies (1 Hz and 3 Hz) and mean void fractions (0.1 and 0.3). It has been observed from the results of the simulations that for low frequency at a considerable axial length from the inlet no change of radial void distribution pattern can be observed. But as the frequency increases periodic nature of void distribution sustains even at a considerable axial length from the inlet. Interestingly, the void fraction at an axial level shifts from wall peaking to core peaking during one cycle depending on mean void fraction and the amplitude. Simulations results also show that the sustenance of the inlet perturbation depend on mean value or the amplitude of void fraction wave.
General Note: The International Conference on Multiphase Flow (ICMF) first was held in Tsukuba, Japan in 1991 and the second ICMF took place in Kyoto, Japan in 1995. During this conference, it was decided to establish an International Governing Board which oversees the major aspects of the conference and makes decisions about future conference locations. Due to the great importance of the field, it was furthermore decided to hold the conference every three years successively in Asia including Australia, Europe including Africa, Russia and the Near East and America. Hence, ICMF 1998 was held in Lyon, France, ICMF 2001 in New Orleans, USA, ICMF 2004 in Yokohama, Japan, and ICMF 2007 in Leipzig, Germany. ICMF-2010 is devoted to all aspects of Multiphase Flow. Researchers from all over the world gathered in order to introduce their recent advances in the field and thereby promote the exchange of new ideas, results and techniques. The conference is a key event in Multiphase Flow and supports the advancement of science in this very important field. The major research topics relevant for the conference are as follows: Bio-Fluid Dynamics; Boiling; Bubbly Flows; Cavitation; Colloidal and Suspension Dynamics; Collision, Agglomeration and Breakup; Computational Techniques for Multiphase Flows; Droplet Flows; Environmental and Geophysical Flows; Experimental Methods for Multiphase Flows; Fluidized and Circulating Fluidized Beds; Fluid Structure Interactions; Granular Media; Industrial Applications; Instabilities; Interfacial Flows; Micro and Nano-Scale Multiphase Flows; Microgravity in Two-Phase Flow; Multiphase Flows with Heat and Mass Transfer; Non-Newtonian Multiphase Flows; Particle-Laden Flows; Particle, Bubble and Drop Dynamics; Reactive Multiphase Flows
 Record Information
Bibliographic ID: UF00102023
Volume ID: VID00485
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: P218-Das-ICMF2010.pdf

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