Originally posted by: Jeff7
I encountered such things in other classes. One involved Finite Element Analysis - a thing, such as a beam, is modeled up using a bunch of elements, each one generally a small block of some sort. This can be used to model its behavior under a variety of conditions.
Refining the mesh involves making many smaller elements to minimize errors caused by large elements. But of course, more elements means more time is needed to do the calculations.
The professor is also a bit tricky - he worked for ANSYS, and he's rather passionate about the software. It's also a senior-level class, so I'm expecting more trick questions.
True/False: Refining the mesh gives better results.
I answered "False."
Why? Because it doesn't guarantee better results. Yes, refining the mesh can give better results, but not always. Maybe the mesh isn't the problem. Maybe the model didn't have the proper loading applied. The model's dimensions may be wrong. Garbage in, garbage out. Thus, refining the mesh does not necessarily give better results.
After explaining that to the professor, his answer was simply, "You're thinking about it too much."
I don't like though that I don't get credit, even after demonstrating clearly that my understanding of the material goes beyond what the simple question was asking.