Liquid-Solid Fluidization by Power-law Liquids — Lesson 3

This lesson covers the complex topic of Transport Phenomena of Non-Newtonian Fluids, focusing on Liquid-Solid Fluidization by Power-law Liquids. It delves into the comparison of a packed bed when the flow is downward and upward, leading to fluidized bed conditions. The lesson explains the behavior of particles under different conditions, such as downward flow, upward flow, and fluidization. It also discusses the concept of pressure drop in relation to volumetric flow rate and superficial velocity. The lesson further explores the calculation of minimum fluidization velocity and the impact of different factors on it. For instance, it uses an illustrative example of a bed consisting of uniform glass spheres to explain the calculation process.

Video Highlights

02:55 - Discussion on the behavior of fluidized beds under different conditions and velocities.
12:10 - Discussion on the relationship between pressure gradient and superficial velocity in a fluidized bed.
14:20 -Discussion on the impact of dispersion in fluidized beds and the calculation of the Galileo number.
15:25 - Explanation of the concept of liquid-solid mass transfer in fluidized beds and the measurement of mass transfer coefficients.

Key Takeaways

• Understanding the behavior of particles in different flow conditions, including downward flow, upward flow, and fluidized bed conditions.
• Gaining insights into the concept of minimum fluidization velocity and the method to calculate it.
• Discussing the concept of liquid-solid mass transfer in fluidized beds and the factors affecting it.