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hw12F10

# hw12F10 - (air or water and why 4 Plot the distribution of...

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AAE333 Fall 2010 Homework 12 Due: Mon Dec 6 10% bonus if turned in on Fri Dec 3 1) Air flows over a flat plate at 10m/s. The plate is 1m long by 5 m wide. Find the drag on the plate (include both sides). Assume the BL is fully laminar 2) How do the answers in 1) change if the fluid is water instead of air? 3) Plot the distribution of boundary layer thickness (measured to the 99% point) from leading edge to trailing edge for the case of Pb 1) and 2). Which is thicker
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Unformatted text preview: (air or water) and why? 4) Plot the distribution of displacement thickness from leading edge to trailing edge for the case of Pb 1) and 2). Which is bigger (air or water?) Which is bigger (99% thickness or displacement thickness?) 5) What is the vertical velocity 1 cm above the plate surface? 6) What would the drag be if the flow in Pb 1&2 were fully turbulent from the leading edge (using the empirical formula Eq 19.2 in Anderson)?...
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