My last internship was to characterize and model thermal and optical properties of the lamp which is used in automobiles.
The difficulty of this project was to model the change of temperature on the surfaces (interior and exterior) of the bulb.
This industry project had had lasted 3 years and no one had succeeded in this part.
After I joined this team, I continued to study the examples in the website, watched their teaching videos and exchanged the ideas with others.
At the beginning, I supposed that the bulb is a surface (has no thickness) and made a simple model under the help of other engineers.
Then, I succeeded to prove that the bulb is a thin optical material which means the difference of temperature in interior surface and exterior surface could be ignored.
This difficulty was solved simply and unexpectedly.
So that this project could be continued and my work has been (or will be) published in key Engineering magazine.