Cheg 355 - Lecture Notes - Sept. 2, 2004
Announcements
Class notes
Scanned Notes
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
- Work through the section Dynamics/Newton's Second Law on the multimedia
CD. The motion simulator is alot of fun to play with - if you have a fast
computer! We'll be deriving the flow equations in class in a litte bit, so
you don't have to worry about that part yet.
Additional Readings:
In class we talked about the fraction of an iceberg which was below the waterline. For more
information on icebergs (at least those in the North Atlantic), as well as some cool pictures, check
out the link given here.
Demonstration:
In class today we demonstrated how hydraulics work, and how you can use a
column of water and a little math to make a weighing scale. You should get to know
some key numbers: 1 atm = 33.9 ft of water = 10.3 meters of water, 1psig = 2.3 ft of
water, etc. These numbers are useful for doing back-of-the-envelope type calculations
in designing piping networks. We'll look at such networks near the end of the term.
David.T.Leighton.1@nd.edu