• RMIT Australia
  • RMIT Global
  • RMIT Australia
  • RMIT Europe
  • RMIT Vietnam

• Students
• Alumni
• Staff

Research Repository

Back to Library

• Home
• Browse
• Search
• FAQs
• About
• Contact Us

Numerical study of isothermal gas-liquid two-phase bubbly flow Li, C 2011, Numerical study of isothermal gas-liquid two-phase bubbly flow, Doctor of Philosophy (PhD), Aerospace, Mechanical and Manufacturing Engineering, RMIT University. Document type: Thesis Collection: Theses Attached Files Name Description MIMEType Size Li.pdf Thesis application/pdf;... 2.96MB Title Numerical study of isothermal gas-liquid two-phase bubbly flow Author(s) Li, C Year 2011 Abstract With the development of computer capability and advancement of modelling software, the technology of computational fluid dynamics (CFD) has been gradually recognized and utilized in engineering field to help seeking practical industrial solutions of gas-liquid two-phase flow. Among various numerical models for two-phase flow, the two-fluid model which traces two phases separately by using two sets of transport equations can be considered as the most accurate one. However, the numerical descriptions of interfacial actions bridging these two phases become to critical aspects to transport equations. The interfacial process descriptions named closure terms generally include three aspects, referred as turbulence model, interfacial driving force and interfacial area concentration (interfacial area per unit). In current study, the capability of Two-fluid model and its closure terms has been investigated to simulate vertical and horizontal bubbly flow conditions. An additional population balance model has been adopted to trace the interaction mechanisms between bubbles/bubbles and bubbles/eddies. There are three major aims for this current work: i) to assess the capability of an experimental drag coefficient correlation in terms of local void fraction and to compare this model with Ishii-Zuber drag coefficient model. ii) to estimate the performance of population balance model-Average Bubble Number Density (ABDN) model on horizontal bubbly flow where the internal local parameters are highly asymmetrically distributed along the radius direction. iii) to value the qualification of recently developed Direct Quadrature Methods of Moments (DQMOM) model which transforms the description of Particle Size Distribution (PSD) problem into lower-order moments of the size distribution (Cheung et al 2009 b). Degree Doctor of Philosophy (PhD) Institution RMIT University School, Department or Centre Aerospace, Mechanical and Manufacturing Engineering Keyword(s) Two-phase flow population balance model interfacial drag force horizontal bubbly flow Direct Quadrature Methods of Moments (DQMOM) model Versions Version Filter Type Fri, 21 Sep 2012, 15:56:12 EST Fri, 21 Sep 2012, 15:57:42 EST Tue, 30 Oct 2012, 15:32:46 EST Fri, 12 Sep 2014, 08:38:34 EST Filtered Full Access Statistics: 292 Abstract Views, 998 File Downloads  -  Detailed Statistics Created: Fri, 21 Sep 2012, 15:56:06 EST by Kelly Duong