CHAPTER 6: Fundamentals of Fluid FLow Flashcards
The amount of fluid passing a section of a stream in unit time is called ____________-
discharge.
Q=Av is known as _________
volume flow rate
This occurs when the
discharge 𝑄 passing through a
given cross section is constant
with time.
STEADY FLOW
If the flow 𝑄 at the
cross-section varies with time,
the flow is ________—
unsteady.
This occurs if, with steady flow for a given length,
or reach, of a stream, the average velocity of flow is
the same at every cross-section.
UNIFORM FLOW
This usually occurs when an incompressible fluid flows through a stream with uniform cross-section.
UNIFORM FLOW
In stream where the cross
sections and velocity changes, the flow is said to be
___________
non-uniform.
This occurs when at any time, the discharge Q at
every section of the stream is the same (principle of
conservation of mass)
CONTINUOUS FLOW
the ability of a mass to do work by virtue
of its velocity.
Kinetic energy
In connection to the action of gravity, __________ is manifested in a fluid by virtue of its position or elevation relative to a horizontal datum plane
elevation energy
energy transmitted to the fluid by another
mass that possesses some energy
Pressure energy (PE)
The ______ or ______ in a fluid is the sum of kinetic and potential energies
total energy or head
These are the two potential energies
pressure anergy and elevation energy
rate of doing work per unit of time.
power
According to Daniel Bernoulli: Neglecting head lost, the total amount of __________ is constant at any point in the path of flow
energy per unit weight
Without head loss, the total energy in pt 1 is _______ to the total energy at pt 2
equal
____________ is an ideal condition leading to theoretical values in results
No head lost
It is used basically to increase the energy if flow
pump
Pump consumes _________and delivers _________
electrical energy (Pinput); flow energy (Poutput)
They extract flow energy and converted it into mechanical energy which in turn converted into electrical energy
turbines
Hydraulic grade line is also called ______ and ________
hydraulic gradient; pressure gradient
