Heating of Nano-Film — Lesson 2

This lesson covers the application of the non-pre-heat conduction model for different heat transfer problems, particularly in the context of welding dissimilar materials. The lesson delves into the use of ultrasound pulse lasers on nano films, the impact of thermal analysis, and the differences between the non-Fourier and Fourier heat conduction models. It also discusses the importance of relaxation time in the dual phase lag model and how it affects temperature distribution. The lesson further explores the concept of thermal inertia and its effects on temperature profiles during welding processes. An example of welding steel and aluminum alloy using ultrasound pulse lasers is used to illustrate these concepts.

Video Highlights

01:12 - Application of ultrasound pulse laser on nano films and how the finite element model can be used to analyze the results
06:24 - Effect of relaxation time on the temperature distribution
14:53 - How the quadruple double ellipsoid heat source model can be used in the welding process
29:59 - Effect of pulse frequency and pulse energy on the welding process and how it can be optimized
34:57 - How the thermal inertia effect can be observed in the welding process

Key Takeaways

- The non-pre-heat conduction model can be used for various heat transfer problems, including welding of dissimilar materials.
- Ultrasound pulse lasers can be used to heat nano films, and the results of this process can differ from those of the Fourier heat conduction model.
- The relaxation time in the dual phase lag model plays a crucial role in determining temperature distribution.
- Thermal inertia can affect temperature profiles during welding processes, and its effects can be observed through the use of ultrasound pulse lasers.
- The welding of dissimilar materials like steel and aluminum alloy can be achieved through the careful manipulation of pulse frequency and energy.