CBE 30355 - Lecture Notes - Sept. 3, 2026
Announcements
Class notes
Read through pages 38-50 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
- Hydrostatics
- Lagrangian and Eulerian Descriptions
Goals:
After this class you should be able to:
- Calculate pressure distributions in fluids at rest.
- Distinguish Eulerian and Lagrangian descriptions of fluid motion.
Reading
- The class notes.
- BS&L chapter 1
Additional Readings:
I've written a couple of Matlab examples of how you can easily do linear regression on viscosity data (in the file ethglycolvisc.m) and integrate a system of ODE's (in the file rabbitsandfoxes.m). You may find these examples useful for the homework next week...
Demonstration:
In class today we demonstrated how you can use Archimedes Law to measure the density of an object using a scale, a thread, and a beaker of water. Although it isn't clear -exactly- what happened way back when, the legend is that Archimedes developed the idea to determine whether a goldsmith was honest in making a crown for the king, or whether he substituted in a base metal for a fraction of the gold (pocketing the rest). There are many websites discussing this famous example of hydrostatics, a good one can be found here. This site includes a translation of Galileo's take on what really happened...
David.T.Leighton.1@nd.edu