Fluid Properties Flashcards

1
Q

What is the shear force in static fluid?

A

Zero

Shear force in a static fluid is zero because the fluid is at rest and there is no relative motion.

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2
Q

Density is

A

Mass/volume

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3
Q

Density Units

A

Kg/m3

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4
Q

Specific Weight

A

Row g

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5
Q

Weight

A

Row g V

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6
Q

Compressibility

A

-dV/VdP

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7
Q

Force

A

Viscosity x Area x Velocity/ h

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8
Q

Kinematic Viscosity

A

Dynamic viscosity/ density

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9
Q

Dynamic Viscosity Unit

A

Kg/m.s

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10
Q

Kinematic Viscosity Unit

A

m²/s

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11
Q

As pressure Increases, kinematic Viscosity in liquid

A

Doesn’t Change

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12
Q

As pressure Increases, Dynamic Viscosity in gas

A

Doesn’t Change

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13
Q

As pressure Increases, kinematic Viscosity in gas

A

Decreases

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14
Q

With increase in temperature, Vapour Pressure…

A

Increases

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15
Q

Torque

A

Power x angular velocity
Force x radius

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16
Q

Surface tension

A

F/L
Force/perimeter

17
Q

Surface tension SI unit

A

N/m

18
Q

Surface tension is due to

A

Unbalanced cohesive forces

19
Q

Pressure difference in droplets ll

A

2 sigma / R

20
Q

Pressure difference in bubble

A

4 sigma/ R

21
Q

Pressure difference in air bubble

A

2 sigma / r

22
Q

Pressure difference in liquid jet

A

Sigma/R

23
Q

Capillary rise is due to

A

Adhesion

24
Q

Capillary fall is due to

A

Cohesion

25
Q

Capillary rise formula

A

4 sigma cos@ / wd

26
Q

Rise in parallel plate

A

h = 2 sigma cos@/wt

27
Q

Rise in coaxial tubes

A

h = 2 sigma Cos@ / w [Ro-Ri]