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Flashcards in Water Supply Engineering Deck (138)
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1

Branch of continuous mechanics which deals with the study of all fluids under static and dynamic situations

Fluid Mechanics

2

Fluids at rest

Fluids Statics

3

Deals with velocities and streamlines w/o considering forces or energy

Kinematics

4

Deals with the relations between velocities and accelerations and forces exerted by or upon fluids in motion

Fluid Kinetics/Dynamics

5

Deals with the application of fluid mechanics to engineering devices

Hydraulics

6

Deals with the flow of fluids that undergo significant density changes

Gas Dynamics

7

Deals with the flow of gases over bodies such as air vehicles. Helps also in designing them

Aerodynamics

8

It is the study of materials showing dual behaviors; under certain limits; it behaves like solids and under others behaves like fluid

Rheology

9

Convenient to assume fluids are continuously distributed throughout the region of interest

Continuum

10

It will deform at different rates. Directly proportional to stress and strain

Newtonian Fluid

11

Fluid in which shear stress is not directly proportional to deformation rate

Non-Newtonian Fluid

12

Shear thinning fluids, becomes less resistant to motion with increased strain rate

Pseudoplastics

13

Shear thickening fluids becomes more resistant to motion as the strain rate increases

Dilatants

14

It requires a minimum shear stress to cause motion

Bingham Fluids

15

Regions where frictional effects are significant. They are usually close to solid surfaces

Viscous Region

16

Regions where frictional forces are small compared to inertial or pressure force

Inviscid Region

17

Undergoes significant changes in density as they flow

Compressible Fluids

18

Does not undergo significant changes in density as they flow

Incompressible Fluids

19

The measure by which a physical variable is expressed quantitatively

Dimensions

20

Particular way of attaching a number to quantities

Unit

21

The amount of matter in a particle or object.

Mass

22

The force that gravitation exerts on a body

Weight

23

Mass per unit of volume

Density

24

The volume occupied by a unit of mass of fluid. Reciprocal of density

Specific Volume

25

Weight per unit volume

Unit/Specific Weight

26

A unitless ratio of a fluid's density to some standard reference density, like water

Specific Gravity

27

Property of fluid that can be thought as the internal stickiness of a fluid; that is due to its resistance to shearing stress

Absolute/Dynamic Viscosity

28

The ratio of the dynamic viscosity of the fluid to its density. It is a quantity in which no force is involved

Kinematic Viscosity

29

To characterize the fluid compressibility of fluids. It is the reciprocal of coefficient of compressibility. Unit is pascal.

Bulk Modulus of Elasticity

30

It is the fractional change in the volume of a fluid per unit change in pressure in a constant temperature pressure

Compressibility