Mechanical properties of fluid

notes

Ideal fluids

are hypothetical fluids that exhibit no viscosity and incompressibility, allowing them to flow without resistance.

Properties of ideal fluids

Non viscous

incompressible/irrotational

constant flow

Fluids properties

do not oppose the motion

can flow

takes the shape of the container

Pressure

Normal is the force exerted per unit area on a surface by a fluid.

formula and SI unit of pressure

P=Force/Area

SI unit is Pascal (Pa), defined as one newton per square meter.

bar and pascal

1 bar = 10⁵ pascal

viscosity

A measure of a fluid's resistance to flow or deformation, indicating how thick or sticky it is.

Volume of cylinder

The volume of a cylinder is calculated by the formula V = πr²h, basically

area of cross section x height

Pressure under water is independent of?

Area/ shape of object

and depends only on depth.

If you go up a mouuntain (height increases) pressure decreases or increases?

decreases due to lower atmospheric pressure at higher altitudes. (getting close to the air coloum which starts from exoshphere)

atmospheric pressure =?

the force exerted by the weight of air above a given point measured in Pascals.

Pressure atmosphere = 1 bar

Gauge pressure=?

pressure where atmosphereic pressure is NOT CONSIDERED

Absolute pressure=?

pressure where atmosphereic pressure IS CONSIDERED