Cheg 355 - Lecture Notes - Sept. 16, 2004
Announcements
Class notes
Scanned Notes
The main points of the lecture were
- Conservation of Momentum and the Cauchy Stress Equations
Goals:
After this class you should be able to:
- Solve simple force and momentum balance problems.
- Be able to derive the Cauchy Stress Equations.
Reading
- The class notes.
- BS&L, chapter 3
- Multi-Media Fluid Mechanics: Work through Kinematics: Flowlines and Flow Visualization.
This section is a tremendous amount of fun. It discusses the various techniques
which can be used to visualize flows, and clicking on any picture brings up the
corresponding movie!
Additional Readings:
In our class demonstration today we looked at Crookes' Radiometer, which was
initially thought to be a demonstration of the momentum associated with quanta of
light. It took many years before the noted hydrodynamicist Osborne Reynolds (1879)
was able to show that it was actually a demonstration of the migration of molecules due
to thermal gradients around the edges of the vanes. For a detailed explanation of the
phenomenon and its history, go here.
Demonstration:
David.T.Leighton.1@nd.edu