This lesson covers the concept of fluidization in porous media, focusing on the Ergun equation and Darcy's law. It discusses the conditions under which a porous medium may not behave as expected, leading to a process known as fluidization. The lesson explains the concept of fluidization using the example of a packed bed of particles through which a fluid is flowing. It also discusses the relationship between pressure drop, flow rate, and superficial velocity. The lesson further explores the concept of incipient fluidization, the point at which fluidization begins, and how to calculate the minimum fluidization velocity. It also discusses the importance of maintaining a significant gap between the terminal velocity and superficial velocity to ensure stable fluidization. The lesson concludes by explaining how to predict the conditions under which fluidization will occur and remain stable.

- Fluidization in porous media occurs when the pressure drop across the bed is equal to the weight of the bed per unit cross-sectional area, allowing for the buoyancy force.
- The point at which fluidization begins is known as incipient fluidization, and the superficial velocity at this point is the minimum fluidization velocity.
- To ensure stable fluidization, it's important to maintain a significant gap between the terminal velocity and superficial velocity.
- The Ergun equation and Darcy's law are essential tools for understanding and predicting the conditions under which fluidization will occur and remain stable.

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