knudson number calculator

enter the value and click "calculate", the calculation result will be displayed.

choose a calculator:
 
mean free path (λ):
m
representative physical length scale (l):
m

calculation result:

what is knudson number? knudsen number (kn) is a dimensionless quantity used to determine the relative importance of molecular effects in gas or fluid flow. it is expressed as the ratio of the mean free path of the molecule to the characteristic length scale of the system. the mean free path is the average distance traveled by molecules between collisions, while the characteristic length scale represents the relative size of the system.
search calculator