Understanding Homogeneous Model — Lesson 3

This lesson covers the concept of homogeneous flow and heat transfer, focusing on the applicability and basic assumptions of the homogeneous model. It delves into the calculation of pressure drop in a pipeline with homogeneous flow and the impact of phase change on such flow. The lesson also explains how to calculate properties like density and viscosity for a homogeneous phase using various correlations. It further discusses the pressure drop in a uniformly heated tube and provides a practical example to illustrate the concepts. The lesson concludes with a quiz to test the understanding of the concepts discussed.

Video Highlights

01:11 - Explanation of the homogeneous flow model with a figure.
07:02 - Calculation of the pressure drop in a homogeneous pipeline.
09:12 - Calculation of the frictional pressure drop in a pipeline.
14:23 - Explanation of the pressure drop due to acceleration in a pipeline.
27:36 - Calculation of the pressure drop in a uniformly heated tube.

Key Takeaways

- Homogeneous flow assumes that the gas phase velocity is equivalent to the liquid phase velocity.
- The density for the homogeneous flow can be calculated using the continuity equation.
- The viscosity of the fluid in a homogeneous phase can be determined using correlations like the Macadams correlation and the Chti correlation.
- The pressure drop in a pipeline with homogeneous flow can be calculated considering factors like friction, potential head, and acceleration.
- The pressure drop in a uniformly heated tube can be calculated considering the frictional pressure drop, acceleration pressure drop, and gravitational pressure drop.