Fluid Mechanics Review

Flashcards based on lecture notes about viscosity, fluid dynamics, pressure, and depth.

What is viscosity?

A measure of the internal friction in a fluid.

What is the viscous force?

The resistance between two internal layers of a fluid.

What happens to the kinetic energy of a fluid due to viscosity?

It is converted to internal energy.

What are the characteristics of an ideal fluid?

Incompressible and has no viscosity.

What is pressure?

The perpendicular force component exerted per unit area over a given surface.

What are the units for pressure?

N/m² = Pascal (Pa)

Is pressure a scalar or a vector?

Scalar

What does the perpendicular force imply in the context of pressure?

The force quantity implies a perpendicular force.

What remains constant regardless of pressure exerted on a fluid?

The volume and density of a given amount of fluid.

What is the source of pressure at sea level?

Atmospheric pressure (1 atm).

How does depth affect pressure in a fluid?

Higher depth results in higher pressure.

What is the approximate pressure at the surface (0m depth)?

1 bar

What is the approximate pressure at 10m depth?

2 bar

What is the approximate pressure at 20m depth?

3 bar

What is the approximate pressure at 30m depth?

4 bar

What is the approximate pressure at 40m depth?

5 bar

What is the approximate pressure at 50m depth?

6 bar

What is 'Atmospheric Pressure Absolute' also called?

ATA

How does the force on a diver relate to the water above them?

The force on the diver is the weight of the column of water above.

What is the formula for pressure related to density, gravity, and height?

P = ρgh (gauge pressure).