Contents - Index


D_11_gas

D_11_gas(G$, T, P)  calculates the self diffusion coefficient for any pure gas in the EES database using the method presented by:

Eli Ruckenstein and Hongqin Liu,
Self-Diffusion in Gases and Liquids
Ind. Eng. Chem. Res. 1997, 36, 3927-3936

 
Inputs:
G is a string containing the name of any gases in EES data base
T and P are the  temperature and pressure  in the unit system indicated by the EES Unit System dialog.  

Output:
D_11_gas isthe self-diffusion coefficient returned in units of [m^2/s] for SI units or [ft^2/s] for English units.

Example:

"Calculate the self diffusion coefficient for argon at 0 C and atmosperic pressure"

$unitSystem SI C kPa mass
$VarInfo D_11 Units=m^2/s  AltUnits=cm^2/s
T=0 [C]
P=101.3 [kPa]
G$='Argon'
D_11=d_11_gas(G$,T,P)

{Solution:
D_11=0.00001505 [m^2/s] {0.1505 [cm^2/s]}
}