Quasi-Steady Analysis of Simultaneous HT and MT- 1 — Lesson 2

This lesson covers the analysis of simultaneous heat and mass transfer in non-Newtonian fluids. It delves into the quasi-steady analysis approach, which is used to determine time-dependent properties. The lesson uses two illustrative examples to explain the concept. The first example discusses the evaporation of a column of liquid, where the instructor explains how to apply the quasi-steady analysis approach to get the required information. The second example focuses on the melting of a spherical crystal, where the instructor explains how to determine the time required for the complete melting of the crystal. The lesson also covers the importance of boundary conditions and the use of interfacial balance equations in these analyses.

Video Highlights

03:49 - Discussion on the boundary conditions for evaporation and diffusion.
08:51 - Explanation of the concept of pseudo-steady analysis and its application in the problem.
20:12 - Explanation of the concept of melting of a spherical crystal and the factors affecting it.
30:54 - Discussion on the heat flux from the energy equation for the crystal and the liquid.
35:13 - Explanation of the melting time and its calculation.

Key Takeaways

• The quasi-steady analysis approach is used to determine time-dependent properties in non-Newtonian fluids.
• The evaporation of a column of liquid and the melting of a spherical crystal are used as examples to illustrate the application of the quasi-steady analysis approach
• Understanding the interfacial balance equations and the flux balance is crucial in the analysis of simultaneous heat and mass transfer