Liquid of gas, inability to resist tangential force (shear stress) due to deformation (strain).
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Fluid Statics
the study of fluid at rest
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Hydrodynamics
Flow of liquids, usually referring to the flow of water
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Temperature
A measure of intensity of the random molecular motion (kinetic energy of the molecules)
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Density
Mass per unit volume
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Continuum Assumption
Fluid properties varying continually in space
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Viscocity
A measure of the magnitude of resistance to an applied shear stress due to cohesion and interaction between molecules
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Absolute Viscocity
μ
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Kinematic Viscocity
v = μ / p
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Streamline
velocity vector at any point on the line is tangential to the line
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Properties of A Streamline (4)
- No flow passes through a streamline , - any solid boundary is itself a streamline, - any streamline may be replaced by a solid boundary without modifying the flow(only valid for inviscid flow)
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Streakline
the line taken up by successive particles of a fluid passing through a given point
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Pathline
The path traversed by a given fluid particle
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Inviscid Flow
No viscous effects (zero viscosity, all real flows are viscous but may be approximated as inviscid
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Incompressible Flow
ρ is independent of p, usually treated as constant density flows
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N.B:
Air flow is always compressible flow but can be approximated as incompressible if the Mach number is low
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Mach Number for incompressible
0-0.3
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Mach Number for Compressible Subsonic
0.3-0.8
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Mach Number for Transonic
0.8-1.2
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Mach number for Supersonic
> 1
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Mach Number for Hypersonic
>5
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Other cards in this set
Card 2
Front
the study of fluid at rest
Back
Fluid Statics
Card 3
Front
Flow of liquids, usually referring to the flow of water
Back
Card 4
Front
A measure of intensity of the random molecular motion (kinetic energy of the molecules)
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