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Fluid Mechanics –For Civil Engineers is all about SMU

Fluid Mechanics –For Civil Engineers is all about SMU Storing– Moving– Using ( Incompressible fluids - water). To design and manage these systems we need to know We need to know

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Fluid Mechanics –For Civil Engineers is all about SMU

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  1. Fluid Mechanics –For Civil Engineers is all about SMU Storing– Moving– Using ( Incompressible fluids - water) To design and manage these systems we need to know We need to know The STATE of the Fluid--- Usually for CE PRESSURE p and VELOCITY v The interaction of the fluid with its surroundings (Forces) Most problems in CE 3502 will involve finding --- a pressure, a velocity, or a force (energy-work-power) We use 3 sets of tools to determine the State and Forces

  2. 1. Knowing Fluid Properties Density Specific Weight Viscosity Response to shear stress 2. Understanding Forces in Fluids Surface tension Pressure force drag surface resistance

  3. 3. Using Conservation Equations (Mass- Energy-Momentum) Red=control volume Review vector calculus Conservation of Mass (Volume) Arbitrary fixed porous volume in Steady flow field u Q -- volume flow rate Sum of Qins = sum of Qouts n u(x,t) Net flow out of volume = = 0 Conservation of Energy (Bernoulli—If losses are neglected) Where are we Conservation of Momentum Net External Force = rate of change of momentum What is resistance force ? Newton's 2nd Law Review Dynamics -Statics

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