Lecture9_3

# Lecture9_3 - AME 331 Introduction to Fluid Mechanics...

This preview shows pages 1–4. Sign up to view the full content.

11/23/2010 1 AME 331 Introduction to Fluid Mechanics Chapter 9: External Incompressible Viscous Flow Prof. Jesse Little University of Arizona 11/24/10 1 Lecture Preview and Assignments Today 9.5-9.6 Read 9.7 HW 11 due Wed 12/1 Last time . 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
11/23/2010 2 Momentum Integral (9-4) We developed the momentum integral equation using conservation of mass and momentum for a differential CV in the boundary layer. This is a valid approximation for incompressible, steady 2D flow over a solid surface. It is valid for laminar and turbulent boundary layers for which U(x) and p(x) are known functions of position along x. We will show the utility of this expression today 3 Momentum Integral (9-4) To use this expression, there are 3 steps. 1. Assume or estimate U(x). This can be done using Eulers equation (inviscid) For the flat plate case, freestream velocity and pressure are constant. 2. Assume a velocity profile (even bad ones give decent results) This simplifies the momentum integral equation because the value of the integral is just some constant 3. Derive/assume an expression for wall shear. Will be different depending on laminar/turbulent Ditto for step 2 4
11/23/2010 3 MI with Zero Pressure Gradient (9-5) This actually simplifies our momentum integral equation because the value of the integral is just some constant.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern