|Mechanical Properties Of Fluids (Physics)||Close X|
Streamline − Path taken by a fluid particle under a steady flow
The tangent to streamline at any point gives the direction of the flow of liquid at that point.
Two streamlines do not cross each other.
Flow rate remains constant throughout the pipe of flow.
Av = Constant
A − Area of cross-section
v − Velocity of flow
At two points of streamline,
A1v1 = A2v2 [This is called equation of continuity]
Steady flow is possible only at low speed.
Turbulent flow − unsteady motion of the elements of the liquid along a zig-zag path
Critical velocity − limiting value of velocity beyond which the liquid stops flowing as streamline and becomes turbulent
The sum of pressure energy, kinetic energy, and potential energy per unit mass is always constant for the streamline flow of a non-viscous and incompressible fluid.
A1 − Area of cross-section at B
P1 − Pressure at A1
h1 − Height of B
h2 − Height of D
A2 − Area of cross-section at E
P2− Pressure at A2
v1 − Speed at B
v2 − Speed at D
BC = v1Δt
DE = v2Δt
Δt − Time...