Gas-Solid Flow — Lesson 5

This lesson covers the concept of two-phase flow and heat transfer, focusing on gas-solid flow. It explains how to characterize a particle suspended in gas, differentiate between dense and diluted flow, and identify different flow regimes. The lesson also discusses the conditions necessary for these flow regimes to occur and defines saltation velocity in the context of a pneumatic conveying line. It concludes with the calculation of pressure drop inside a pipeline carrying gas-solid two-phase flow. For instance, the lesson explains how gas-solid two-phase flow can be observed in natural phenomena like sandstorms and volcanic eruptions, as well as in industrial applications like pneumatic conveying, fluidized beds, and spray drying.

Video Highlights

02:52 - Gilbert's diagram.
04:56 - Characterization the particle size and shape.
13:02 - Stokes number.
19:41 - Components of a pneumatic conveying line.
34:23 - Pressure drop for a pipeline carrying a dilute phase system.

Key Takeaways

- Understanding the characterization of a particle suspended in gas.
- Differentiating between dense and diluted flow.
- Identifying different flow regimes and the conditions for their occurrence.
- Defining saltation velocity in the context of a pneumatic conveying line.
- Calculating pressure drop inside a pipeline carrying gas-solid two-phase flow.