RAREFIED GAS FLOW THROUGH A LONG CONIC TUBE
The applet provides the mass flow rate of a rarefied gas through a long conic tube caused by an arbitrary pressure drop. The diffuse gas-surface interaction (cosine law) is assumed. It is a particular example of the methodology elaborated in the paper by F. Sharipov and G. Bertoldo, J. Vac. Sci. Technol. A 23(3) , 531-533 (2005). If you have questions or suggestions to improve the program, please write me: sharipov@fisica.ufpr.br.
Scheme of flow

Input data:

Upflow radius radius aI: meter
Downflow radius aII: meter
Tube length L: meter
Upflow Pressure PI: Pa
Downflow Pressure PII: Pa
Gas temperature: K
Gas*:

It takes few seconds

Results:
Mass flux rate: Kg/s
Throughput Pa m3/s at 0oC
Gas viscosity: micro Pa s
Rarefaction δ1:
Rarefaction δ2:
*If you need to calculate another species of gas, write me sharipov@fisica.ufpr.br



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