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Unformatted text preview: ATION γ = weight/unit volume
=ρg Where g = gravitational constant = 9.81 m/s2 (at sea level)
Gravity,
Specific Gravity Gs = γ material
= dimensionless
γ water If Gs > 1 = “Sinker”
If Gs < 1 = “Floater”
Examples: •1 Temperature & Pressure Dependence of
Liquid Water Density Viscosity
Viscosity,
Viscosity
Viscosity µ or ν, is a measure of resistance of a fluid to
deformation by shear forces
Ideal Fluid – no frictional forces during flow
 viscosity = zero
 can be used for gases & vapors
NonNonIdeal Fluid
 shear stresses develop in the fluid during flow Shear stress, τ,
tangential force exerted on a moving
surface per unit area of that surface Defining / Measuring Viscosity Types of Fluids Consider two parallel plates separated by a fluid
distance Y Moving Plate Ideal Plastic Velocity,
Velocity, V
Force, F
velocity profile in fluid NonNewtonian Stationary Newtonian
Force,
Force, F ~ Area of plate x velocity ~ AV
Distance
Y Ideal Fluid τ, shear stress...
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This note was uploaded on 11/10/2011 for the course GEOL 455 taught by Professor Perfect during the Fall '11 term at University of Tennessee.
 Fall '11
 Perfect
 Hydrogeology

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