A fluid in motion is said to be flowing.
We can use streamlines to visualise flow of fluids (they actually are the just the field lines to the velocity field) , similar to how field lines are used to visualise Electric Fields and Magnetic Fields.
The density of streamlines in a fluid is proportional to the velocity of the fluid.
Definition
Formula
Flow of a fluid:
Properties
Laminar/Turbulent Flow
A fluid flowing at a constant velocity everywhere is said to have a laminar flow.
Conversely, a fluid which doesn’t have constant smooth velocity everywhere is said to have turbulent flow.
Compressible/Incompressible Flow
A fluid retains it’s density while flowing. For an incompressible fluid, this means that the volume of the fluid also remains the same.
Rotational/Irrotational Flow
In rotational flow, each of the fluid particles undergo rotational torque as they move. In irrotational flow, this is absent.#tosee
Ideal Fluid
An ideal fluid is one defined to be incompressible. It’s flow is defined to be laminar, incompressible, nonviscous and irrotational !