Fluids and Fluid Systems

Question 1

What is Viscosity?

Answer 1

Fluid resistance to flow

Question 2

What is the dynamic and kinematic viscosity? Units?

Answer 2

Dynamic=Forcedistance/AreaV (Poise,0.1 Pa.s)

Kinematic=dynamic/density (Stakes, 1 cm^2/s)

Question 3

What is Vapour pressure?

Answer 3

Defines volatility. The pressure created when a liquid partially evaporates in a container that expands. In Pa.

Question 4

What is the Flash point?

Answer 4

The lowest temp. under specific conditions when a fluid evaporates enough to flash/burn if a flame to ignites

Question 5

What is the auto-ignition point?

Answer 5

The lowest temp. when a flame is generated in presence of air, with no external ignition

Question 6

What is Compressibility?

Answer 6

The property of a fluid to change volume when subjected to changing pressure

Question 7

What is Beta and its units?

Answer 7

Bulk modulus. The ratio between pressure change and the relative volume of the fluid. In Pa.

Question 8

What is the effective bulk modulus?

Answer 8

Brainscape is shit at formulae. Need to look up myself

Question 9

Define Pascals principle

Answer 9

Pressure transmitted over the entire volume of a fluid, if it is static conditions