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Unformatted text preview: April 24, 2008 Physics 40B Lecture 7 1 Physics 040B/001-S-08 Chap. 14:4-5 Bernoullis Equation Review 1 Pascal (Pa) = 1 N/m 2 p = p o + gh A body that is partly or entirely submerged in a fuid is buoyed up by a Force equal in magnitude to the weight oF the displaced fuid and directed upward along a line through the center oF gravity (mass) oF the displaced fuid. Pressure Pressure variation with depth Pascals Principle p = F " A = Force Area = Newtons m 2 p = F 1 A 1 = F 2 A 2 " F 2 = A 2 A 1 F 1 Archimedess Principle--Buoyant Force April 24, 2008 Physics 40B Lecture 7 2 Continuity Equation & Streamline Fluid Flow Steady Laminar Flow-all particles follow smooth Streamline path that doesnt cross other paths Turbulent Flow-not steady Viscosity of Fluid-due to internal friction-neglect Incompressible uid-density doesnt change, independent of pressure For Streamline ow of incompressible uids: A 1 v 1 = A 2 v 2 = volume fow rate (m 3 /s) Volume Flow Rate (m 3 /s) = A v April 24, 2008...
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- Spring '08