Lecture9_4 - 11/28/2010 AME 331 Introduction to Fluid...

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11/28/2010 1 AME 331 Introduction to Fluid Mechanics Chapter 9: External Incompressible Viscous Flow Prof. Jesse Little University of Arizona 11/29/10 1 Lecture Preview and Assignments Today 9.7 Read 9.7-9.8 HW 11 due Wed 12/1 Last time…. 2
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11/28/2010 2 Review We used the momentum integral to find boundary layer thickness for both a laminar and turbulent flow. This simplification yielded decent results provided we had information on the freestream velocity, BL velocity profile and wall shear stress expression. Also discussed pressure gradient and said we need and adverse pressure gradient to get separation. Necessary but not sufficient condition 3 Review Discussed pressure gradient and said we need and adverse pressure gradient to get separation. Necessary but not sufficient condition 4
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11/28/2010 3 Review Laminar v. Turbulent Boundary layers Consider BL profiles for both with same freestream U Turbulent is more resistant to separation (it has more
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Lecture9_4 - 11/28/2010 AME 331 Introduction to Fluid...

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