Thermal and Concentration Boundary Layer Thickness of Non-Newtonian Fluids — Lesson 3

This lesson covers the complex topic of transport phenomena of non-Newtonian fluids. It delves into the thermal and concentration boundary layer thickness of non-Newtonian fluids, explaining the integral momentum equation for boundary layer flows and how it applies to both Newtonian and non-Newtonian fluids. The lesson also discusses the development of different expressions for the velocity profile and momentum boundary layer thickness. It further explains the integral energy equation for heat transfer in boundary layer flows and how to derive the momentum boundary layer thickness for different types of velocity profiles. The lesson concludes with a discussion on mass transfer in laminar boundary layer flow of power law liquids.

Video Highlights

01:39 - Discussion on the development of different expressions for the velocity profile and the momentum boundary layer thickness.
07:17 - Derivation of the thermal boundary layer thickness of power law fluid flowing over an isothermal flat plate.
55:10 - Explanation of the concept of concentration boundary layer and its relation to the momentum and thermal boundary layers.
59:18 - Derivation of the local Sherwood number and the average Sherwood number along the length of the plate for power law liquids.

Key Takeaways

• The integral momentum equation for boundary layer flows is valid for both Newtonian and non-Newtonian fluids.
• The velocity profile and momentum boundary layer thickness can be developed for different types of fluids.
• The integral energy equation is used for heat transfer in boundary layer flows.
• The momentum boundary layer thickness can be derived for different types of velocity profiles.
• Mass transfer occurs in the laminar boundary layer flow of power law liquids.