Cheg 355 - Lecture Notes - Oct. 30, 2001
Announcements
Due to the AIChE meeting, the class next Tuesday is cancelled. It will be made
up during the regular review session on November 12.
Class notes
Scanned Notes
The main points of the lecture were
- The Reynolds Lubrication Equation
- The Streamfunction
Goals:
After this class you should be able to:
- Use the Reynolds Lubrication Equation to calculate the forces in 2-D lubrication flows.
- Define the streamfunction for 2-D flows.
Reading
- The class notes.
- Middleman, chapter 6 & 8.
Additional Readings:
One of the most interesting examples of lubrication flows is that found in ice-
skating. In that winter sport, the friction between the blade and the ice melts a small
quantity of water, forming a thin lubricating layer. The old story that it's the pressure
of the blade which melts the ice isn't true - it's the frictional heating that does the trick.
A good discussion of the effects of a thin layer of water on ice (taken from a Scientific
American article) is given here.
David.T.Leighton.1@nd.edu