Two-Fluid and Population Balance Method — Lesson 2

This lesson covers the concept of two-phase flow and heat transfer, focusing on the two-fluid model and population balance methodology for predicting dispersed two-phase flow. It explains the techniques for modeling two-phase flow considering separated and dispersed configurations and elaborates on the algorithm for solving dispersed gas-liquid two-phase flow using the two-fluid population balance methodology. The lesson also discusses the model equations for breakage and collisions of dispersed phases in the context of population balance methodology. A case study of bubbly flow and its subsequent transition to slug flow is also captured using the two-phase two-fluid population balance methodology. The lesson concludes with a review of the Unix platform and running numerical code.

Video Highlights

01:39 - Modeling methodology for multi-phase flow and understanding the interface.
07:44 - Different computational fluid dynamics methodologies available for a multiphase flow.
11:05 - Eulerian and Lagrangian methodologies for interface tracking.
19:41 - Population Balance Methodology
27:47 - Case study of bubbly flow through a circular duct using population balance methodology.

Key Takeaways

- Two-phase flow and heat transfer involve the interaction of two distinct phases, typically a gas and a liquid.
- The two-fluid model and population balance methodology are essential tools for predicting dispersed two-phase flow.
- The modeling of two-phase flow considers both separated and dispersed configurations.
- The algorithm for solving dispersed gas-liquid two-phase flow uses the two-fluid population balance methodology.
- The Unix platform is a useful tool for running numerical code in this context.