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Theoretical Development of Heat Transfer Model — Lesson 1

This lesson covers the fundamentals of non-Fourier heat conduction, a concept crucial in understanding specific welding processes and ultrasound pulse laser processing. The lesson delves into the differences between Fourier and non-Fourier heat conduction models, the assumptions made in Fourier's law, and how these assumptions are modified in non-Fourier models. It also explains how to develop a finite element model for non-Fourier heat conduction and how to apply it in different scenarios. For instance, the lesson illustrates how to use the model to analyze the heating of nano films using ultrasound pulse lasers.

Video Highlights

01:06 - Ultrasound pulse laser processing and its impact on heat transfer mechanisms
13:57 - Difference between long pulse laser, short pulse laser, and ultra short pulse laser
22:24 - Assumptions of Fourier's law of heat conduction
33:01 - Non-Fourier heat conduction model and its application in ultrasound pulse laser heating
57:51 - Numerical algorithm for solving non-Fourier heat conduction model

Key Takeaways

- Non-Fourier heat conduction is essential in analyzing specific welding processes and ultrasound pulse laser processing.
- Fourier's law assumes instantaneous propagation of thermal disturbances, which is not always the case in real-world scenarios.
- Non-Fourier models account for delays in heat flux and temperature gradient development, making them more accurate for certain applications.
- Finite element models can be developed for non-Fourier heat conduction, allowing for detailed analysis and prediction of heat transfer phenomena.
- The non-Fourier model can be used to analyze the heating of nano films using ultrasound pulse lasers, among other applications.