Part 1: Introduction and Review Flashcards
What is a Fluid?
A substance that deforms continuously when acted upon by a shearing stress of any magnitude
How many fluid types are there? What are they?
Two. Gas and Liquid
True or False: Both gases and liquids experience “no slip” conditions.
True
What is Specific Gravity?
The ratio of mass density of a fluid to that of water
What is surface tension?
The intensity of the molecular attraction per unit length along any line in the surface of a liquid
__________ is the use of fluid static principles for the measurement of fluid pressure
Manometry
__________ is the study of motion without regard to forces causing motion
Kinematics
What is the line tangent to velocity vectors throughout flow field?
Streamline
The Continuity equation is a simplified statement of the law of ________________
Conservation of Mass
Whats the difference between Local Acceleration and Convective Acceleration?
Local is the change in velocity with respect to time, while convective is with respect to position
True or False: Acceleration can be considered only along a streamline
False, Acceleration can be considered both along the streamline and normal to the streamline
What is Newton’s First Law?
Law of Inertia. An object at rest tends to stay at rest and an object in motion stays in motion with the same speed and same direction unless acted upon by another force.
What is Newton’s Second Law?
F=ma, a force is equal to the change in momentum per change in time
What is Newton’s Third Law?
For every action, there is an equal and opposite reaction
What are the three causes of pressure variation?
- Gravity
- Acceleration
- Viscous Resistance
True or False: Potential Flow deals With Gravity and Viscous Resistance?
False. Potential flow deals with Gravity and Acceleration
True or False: Steady Flow has only Convective Acceleration
True
Bernoulli’s equation is essentially a statement of the “ Law of _____________”
Law of Conservation of Mass, where mass can neither be created nor destroyed. Simply just changed from one form to another
Piezometric head is the sum of _______
Pressure head and Elevation head
What is the difference between a Pitot tube and a Piezometer?
The pitot tube measures Total head (p, z, v), While a piezometer measures only static (pressure) head (p, z).
What is the difference between Pitot tube and Pitot Static?
Pitot static measures only Velocity head, while the pitot tube measures the total head.
A free vortex has which type of flow?
irrotational. An example of this would be a Tornado or a Bath tub
A __________ is a given quantity of matter, which may move, flow and interact with its surroundings
System
What is a Control Volume?
A region (or Volume) in space through which a fluid may flow
What is a Control Surface?
The exterior boundary of a control volume
What is an Extensive Property?
a characteristic of the total mass of the system. Symbol is a Capital letter. Ex. Mass, Momentum, Energy
What is an Intensive Property?
a characteristic describing the condition of the fluid. Symbol is often a Greek letter.
Control Volume is associated with what Theory?
Reynolds Transport Theorem
What are the two types of External forces?
Body Forces (weight) and Surface Forces (friction)
What are the three types of Energy?
Potential. Kinetic. Internal. (KIP)
What are the two types of Work?
Flow Work (related to fluid pressure). Shaft Work (Pump, Turbine)
