Flashcards
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Flashcards do conjunto (35)
- 1What is the difference between a solid and a fluid?- Solid can resist an applied shear by deforming
- Fluids deform continuously under applied shear - 2In a fluid at rest, the normal stress is called __________ .Pressure (F/A), (N/M^2)
- 3What Is Viscosity?A Property that allows the no-slip condition
- 4What is the no-slip condition?When a fluid sticks to a surface, making the velocity at that point = 0 (no slipping)
- 5What is the difference between viscous and inviscid fluid flows?- Viscous flows are close to solid surfaces (frictional effects are significant)
- Inviscid flows are not - 6What is the difference between internal and external fluid flows?- Internal flows are dominated by influence of viscosity throughout the surface
- The viscous effects of external flows are limited to the surface layer - 7Open channel flow has a ________Free surface
- 8A flow is incompressible if ___________Density remains nearly constant.
- 9Mach Number = ?Flow Speed / Speed of sound
- 10What is the difference between laminar, transistional and turbulant flow?- Laminar flow is highly ordered fluid motion
- Turbulant flow is unorderly
- Transistional flow is turbulant & laminar - 11What is transient flow?Transient flow describes a flow that is starting to move
- 12Intensive properties are independent of _________?System size or mass (Temperature, Pressure, Density, Viscosity)
- 13Extensive properties are dependent on _____________?System size or mass (Total mass, Total volume, Total momentum)
- 14What are specific properties?Extensive properties per unit mass.
- 15What is the continuum theory?The theory that treats gases as a homogenous matter, with no holes.
- 16Specific Volume = ?SV = Volume/Mass = 1/Density
- 17Specific Gravity = ?Relative Density, the ratio between the density of a substance to the density of a standard reference density.
- 18Specific weight = ?Weight per unit volume (N/M^3) = (density*gravity)
- 19What is cavitation?Pockets of vapor formed in fluids once the pressure of the fluid drops below vapor pressure
- 20What is the difference between dynamic and kinematic viscosity?Dynamic viscosity (Pa*s) is regular viscosity, kinematic viscosity (m^2/s) is viscous resistance to gravity.
- 21What is the difference between shear thinning and shear thickening fluids?Shear thinning fluids will start to deform exponentially while shear thickening fluids will stop deforming at an exponential rate
- 22What is used to measure viscosity?Viscometers
- 23What is surface tension?The pulling effect of liquid molecules at an interface caused by the attractive forces of molecules per unit length (σ) (N/m)
- 24What is the capillary effect?The capillary effect is the rise or fall of a liquid in a small-diameter tube
- 25What is this?Piezometer tube
P(a) = γh + P(1) - 26What is Buoyancy?Buoyancy is the upward force that an object feels from the surrounding fluid.
- 27Apparent weight = ?Apparent weight =
Actual weight - buoyant force - 28What is a streamline?A streamline is a curve that represents the local velocity vectors everywhere on the line
- 29What are the three requirements for a fluid used in Bernoulli's equation?flow must steady, incompressible and frictionless (inviscid)
- 30What is a Venturi Meter?A Venturi Meter is a device used for measuring flows (Q)
- 31What is a Nozzle?A nozzle is a device used to accelerate a fluid.
- 32What is this?Differential Manometer
- 33What is this?Multifluid Manometer
- 34What is this?Open Tube Manometer
- 35What is this?U-Tube Manometer
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- FlashCards sobre Sem título, criado por Jason Harrison em 19-03-2015.
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- Jason Harrison
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