CBE 30355 - Lecture Notes - Nov. 1, 2018

Announcements

The second hour exam will be next Tuesday!

Class notes

The main points of the lecture were

• High Re Flows: Bernoulli's Equation

Goals:

• Use Bernoulli's Equation to solve for the pressure distribution in different geometries.
• Know what inviscid, irrotational flow means!

Reading

• The class notes.
• BS&L, chapter 4

Additional Readings:

In class today we talked about Bernoulli's Equation and how it could be used to solve for pressure distributions - and how at high Re the pressure goes down when the velocity goes up! A classic example of how this can be employed is the Venturi meter. Basically, the flow rate of a fluid is measured by determining the pressure differential produced by a slight contraction of a pipe. While usually little beasties (e.g., the diameter of a pipe), sometimes they can grow to truly gargantuan proportions. A press release describing what is billed as the world's largest flow meter is given here. You can also go directly to a picture of the thing here. The meter itself is a bit too big to put in the undergrad lab - in fact it approaches the size of Fitzpatrick!

Demonstration: