Cunningham correction factor
 

dear friends

I need to calculate Cunningham correction factor for water fluid.please help me

thank you

http://nvl.nist.gov/pub/nistpubs/jre.../j110-1kim.pdf

use bing or google, you will get a bunch of references

Cunningham factor
 

CUNNINGHAM=1+2*FREEPATH/(DP)*(1.257D0+0.4D0*EXP(-1.1D0*DP/&
&(2*FREEPATH)))

Hi dear Negar.

Sounds that you are working on two-phase flow.

Write the above correlation in your program and get the result.

FREEPATH:
is molecular mean free path of the gas.for example for air in standard condition is 0.07 micro-meter.

DP:
is the diameter of particle that injected in gas.