ExampleExam2

ExampleExam2 - ME 114 Fall 2003 Exam 2 Open Book. One page...

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ME 114 Fall 2003 Exam 2 Open Book. One page of notes allowed ( one side of 8 1/2”x11” sheet) Name _____________________________________________________ Time allowed: 52 minutes Make sure that you work on each section of each problem, even if you’re running short on time.
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1. (5) For laminar flow over a constant surface temperature plate, will heat transfer be higher where the boundary layer is thick or thin? 2. (5) You have laminar flow inside a tube. Will the heat transfer coefficient be higher near the inlet or farther downstream? 3. (6) a) The less drag a car has, the better its fuel efficiency (all else being equal). To have the smallest drag possible, do you want your car to be designed to have a big or small wake behind it? b) Will laminar or turbulent boundary layers result in a larger value of pressure drag over a blunt object like a cylinder or a car? 4. a) (5) The energy equation is shown below. Circle the viscous dissipation term (c, d, or e). What, physically, is viscous dissipation? 2
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ExampleExam2 - ME 114 Fall 2003 Exam 2 Open Book. One page...

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