Fluid Flow & Continuity Flashcards
What can fluid flow be classified as?
Fluid flows are classified as being either internal or external
What is the definition of Internal Flow?
Flow in a confined space, e.g. air flow in a pipe
What is the definition of External Flow?
Flow over a surface e.g. air flow over a ball
What depends on the level of variation of density of the fluid flow?
Fluid flow can either be compressible or incompressible depending on the level of variation of density
What can the flow of liquids be generally considered as?
Can be considered as incompressible
What can the flow of gases at low speeds be considered as?
Can be considered incompressible however this is case dependent
Fluid flow can either be…..
Steady or unsteady
What is the definition of steady flow?
Fluid properties at a point do not change with time
What is the mass flow rate equation?
m = pAv [kg/s]
What is the definition of one dimensional flow?
uniform velocity in the cross-section
What is the conservation of mass equation?
p1A1v1 = p2A2v2
In an incompressible fluid what happens when the diameter of the pipe is reduced?
When the diameter of the pipe is reduced, the flow velocity increases
The equation for one or two inlets for the conservation of mass
m1 + m2 = m3
What is the equation for Volumetric flow rate?
Q = m / p = Av [m^2/s]
When a flow is incompressible …..
The density of the fluid is constant
