Ratio of mean free path to characteristic length is called as _________

Knudsen number

Mach number

Nusselt number

None of the above

Correct Answer : Option (A) : Knudsen number

Explanation : Ratio of mean free path to characteristic length is called Knudsen number. Nusselt number is used in heat transfer.

Recently Updated in Compressors, Gas Dynamics and Gas Turbines Questions

The work ratio of simple gas turbine cycle depends on

Pressure ratio

Minimum cycle temperature

Maximum cycle temperature

All of the above

Correct Answer : All of the above

Knudsen number ranges in between 0.3 and 1 in ________

boundary region

boundary & transient region

transient region

None of the above

Correct Answer : transient region

Explanation : Knudsen number ranges in between 0.3 and 1 in transient region.

When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and _________

Correct Answer : 1

Explanation : When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and 1.