notechatper1 - Part II Fundamentals of Fluid Mechanics By...

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Unformatted text preview: Part II Fundamentals of Fluid Mechanics By Munson, Young, and Okiishi ¡ WHAT we will learn I. Characterization of Fluids - What is the fluid? (Physical properties of Fluid) II. Behavior of fluids - Fluid Statics: Properties of a fluid at rest (Physics of the pressure in fluids) - Fluid Dynamics: Behavior of a moving fluid Fluid kinetics and kinematics (Bernoulli Equation & Control volume analysis) ¢ Basic things of Fluids (Properties of Fluids) 1. How is a fluid different from a solid? y Molecular spacing: Solid < Liquid < Gases y Cohesive forces between molecules: Solid (Not easily deformed) > Liquid (Easily deformed, but not easily compressed) > G a s e s (Easily deformed and compressed) y Fluid = Liquid + Gases ≡ A substance that deforms continuously when acted on by a shearing stress * of any magnitude * Shearing stress : Tangential force per unit area acting on the surface 2 . Heaviness of a fluid y Density of a fluid, ρ : Mass per unit volume V m = ρ (kg/m 3 ): Depending on pressure and temperature* * Ideal gas law: RT p ρ = where p ( T ): Absolute pressure (Temp.) R : Gas constant, 287.0 m 2 /s 2 w K y Specific Weight , γ :  Weight (force) per unit volume g ρ γ = (N/m 3 ) y Specific Gravity , SG : Ratio of ρ of a fluid to ρ of water at 4 o C C O H o SG 4 @ 2 ρ ρ = (Unitless) 3. Compressibility of a fluid • Bulk Modulus (Compressibility of fluid, when the pressure changes) Defined as V dV dp E v / − = = ρ ρ / d dp [lb/in 2 or N/m 2 ] − : because p ↑ ( dp > 0), V ↓ ( dV <0) - Large E v → Hard to compress Ú Usually E v...
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This note was uploaded on 12/18/2011 for the course ECON 101 taught by Professor Jayjay during the Spring '11 term at Edhec Business School, Paris.

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notechatper1 - Part II Fundamentals of Fluid Mechanics By...

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