Ch7-External Flows

Ch7-External Flows - Hence, there is a minimum in the...

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Chapter 7 External Flows
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Flow Over Flat Plate
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5 , 5 10 Re × x c
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Cylinder/Sphere in Cross Flow
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Conditions depend on special features of boundary layer development, including onset at a stagnation point and separation, as well as transition to turbulence. Stagnation point: Location of zero velocity and maximum pressure. ( 29 0 = u Followed by boundary layer development under a favorable pressure gradient and hence acceleration of the free stream flow . ( 29 / 0 < dp dx ( 29 / 0 du dx As the rear of the cylinder is approached, the pressure must begin to increase.
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Unformatted text preview: Hence, there is a minimum in the pressure distribution, p(x), after which boundary layer development occurs under the influence of an adverse pressure gradient ( 29 / 0, / 0 . &lt; dp dx du dx Separation occurs when the velocity gradient reduces to zero. / = y du dy and is accompanied by flow reversal and a downstream wake. Location of separation depends on boundary layer transition. Re = D VD VD...
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This note was uploaded on 02/01/2012 for the course MECH ENG 225 taught by Professor Koylu during the Spring '11 term at Missouri S&T.

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Ch7-External Flows - Hence, there is a minimum in the...

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