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Fluid Dynamics

Fluid Dynamics. Zero viscosity (no internal friction) Incompressible (B=∞) (constant density) Steady motion Laminar flow (no turbulence). ∆x 2. ∆x 1. V 1 =V 2. A 1 ∆x 1 =A 2 ∆x 2. t = t. A 1 v 1 =A 2 v 2. Equation of continuity. Flow rate= A∙v. Unit? . = V /t.

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Fluid Dynamics

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  1. Fluid Dynamics • Zero viscosity (no internal friction) • Incompressible • (B=∞) • (constant density) • Steady motion • Laminar flow (no turbulence)

  2. ∆x2 ∆x1 V1=V2 A1 ∆x1 =A2 ∆x2 t = t

  3. A1v1=A2v2 Equation of continuity. Flow rate=A∙v Unit? =V/t A 1.0 cm radius hose fills a 25 liter bucket in 1.0 minute. How fast is the water moving in the hose?

  4. Other Properties of Liquids • Cohesive force: like particles attract • Surface tension • Raindrops • Adhesive force: different particles attract • Meniscus • Capillary action

  5. Bernoulli’s Principle As the velocity of a fluid increases, the pressure it exerts decreases.

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