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Chapter 2: Fluid Properties

Chapter 2: Fluid Properties. Solid-Liquid-Gas Specific Weight Compressible vs. Non-Compressible Solid under shear vs Liquid under Shear Viscosity Newtonian vs. Non-Newtonian Surface Tension Vapor Pressure. Some properties of fluids. Solid – Fluid Solid – liquid – gas

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Chapter 2: Fluid Properties

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  1. Chapter 2: Fluid Properties Solid-Liquid-Gas Specific Weight Compressible vs. Non-Compressible Solid under shear vs Liquid under Shear Viscosity Newtonian vs. Non-Newtonian Surface Tension Vapor Pressure

  2. Some properties of fluids • Solid – Fluid Solid – liquid – gas • How to best distinguish between them? • Solid properties, and response to container boundaries • Mass, density, weight, and the “specifics”

  3. Solid-Liquid and Gas A given mass of liquid will maintain its volume but change its shape to match that of the container where they are in contact.

  4. Dimensions, Units, etc.

  5. Some more fluid properties • Solid – Fluid: how does each respond to an applied shear stress? • (How about a applied pressure stress?) • Viscosity and rheology • What sort of forces does a fluid exert? • Surface tension • Vapor pressure

  6. ly

  7. As we just talked about

  8. What about shear stress?

  9. Imagine an elastic solid held between two Plates-and then applying a shear force To the top plate Then imagine a long open tank (flume) holding water with a wood block floating on the surface And then apply a shear force to the wood Top layer of fluid moves with velocity of block Bottom layer does not move—The NO SLIP condition

  10. Contrast to solid Strain-deformation u displacement shear modulus

  11. Surface Tension

  12. Why 2

  13. Note dependence on R Recall rg is g specific weight

  14. Vapor Pressure

  15. In Denver the atmospheric pressure is only 95% (see page 40) On Everest only 75%--the boiling points are reduced accordingly Boiling will occur

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