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Unformatted text preview: 11/30/2010 1 AME 331 Introduction to Fluid Mechanics Chapter 9: External Incompressible Viscous Flow Prof. Jesse Little University of Arizona 12/1/10 1 Lecture Preview and Assignments • Today – 9.79.8 • Read 9.8 • HW 11 due Friday • HW 12 due Friday 12/10 – Can be submitted by email (PDF only) • Last time…. 2 11/30/2010 2 Drag (97) • Friction Drag (flat plate) – Comes from wall shear – Wall shear is related to near wall velocity gradient – Stronger near wall velocity gradient means more drag force. – Turbulent boundary layers create more drag than laminar – Leading edge of flat plate creates a lot of drag • Example Problem 92 – Developed expressions for laminar and turbulent wall shear • In dimensionless form we use skin friction coefficient, C f 3 Drag (97) • Example problem 92 revisited • Used expressions for wall shear, τ w and integrated to get drag force, F D ....
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This note was uploaded on 08/25/2011 for the course AME 331 taught by Professor Zohar during the Fall '08 term at Arizona.
 Fall '08
 ZOHAR

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