Fluid Flow Flashcards
Define Fluid
A fluid is defined as anything that flows such as a liquid,gas or mixture of both. Fluid takes the shape of its container.
If the depth of the fluid tank increases, how does the pressure at the bottom of the tank change?
The pressure increases
How does the shape of the vessel containing fluid affect the static pressure of a fluid?
It doesn’t affect the pressure
Define head
The height of the liquid
Define specific gravity
Specific gravity is a measurement of density compared to water
Typically, how does fluid flow in a system?
A difference in pressure is required for flow to occur
What effect does decreasing the diameter of a fluid system pipe have on the flow velocity and differential pressure?
The flow velocity increases and pressure decreases
List 4 factors that affect pressure, and head in a fluid piping system
Change in elevation (gravity)
Pipe size
Friction
Velocity
Atmospheric pressure is 1bar and can support a column of 101.3kPa water which is 10.36m high.
If a column of water is 1 metre high, it has a specific pressure of?
101.3/10.36 = 9.8kPa
What are the fluid flow characteristics?
In a fluid system, a difference in pressure is required to occur. Fluid flows from higher pressure to lower pressure
What is differential pressure?
It’s the difference in pressure between one point to another point - this is referred to differential pressure
What is velocity?
Velocity is measured as distance over time.
velocity = distance/time
Continuity equation
Shows relationship between fluid velocity and area in a fluid
Bernoulli’s principle
A key concept in understanding the relationship between pressure and velocity in fluid systems
