CBE 30355 - Lecture Notes - Aug. 30, 2022
Read through pages 26-37 of the notes and view the online narration below. Don't forget to complete the quiz in Canvas!
The main points of the lecture were
After this class you should be able to:
- Calculate pressure distributions in fluids at rest.
- The class notes.
- BS&L chapter 1
One of the fluid properties we talked about last Thursday was the coefficient of
thermal expansion. To see an extreme example of what can happen if this property
is ignored, check out the link given
In class today we demonstrated how to tell a raw egg from a cooked one by
spinning it. In addition to this effect, cooked eggs also have the interesting property
that they tend to "pop up" on their ends when spinning. The mechanics of this phenomenon
are actually quite complex, and only recently was solved by Keith Moffatt of the
University of Cambridge. More information on this effect can be found
A somewhat less whimsical application of egg spinning has recently appeared in Physics of Fluids on concussion research. By looking at what happens to the inside of a raw egg when you spin it vs. impact, the authors conclude that the most likely cause of concussion is shear, not translation. It's when your skull rotates but your brain doesn't... The article is given here.