Hello Team Hydrus,
I am using the formula Hr = exp[h*M*g/RT] to calculate hCritA. It is given that Hr is the relative humidity, h is the pressure head, M is the molecular weight of water [M/mol] (=0.018015 kg/mol), R is the universal gas constant [ML^2/T^2/K/M] (= 8.314 kg m^2/s^2/K/mol, J/mol/K), and T is the absolute temperature [K].
who knows what is ''g'' in this equation?
Thanks,
Isaac
Question on hCritA
Re: Question on hCritA
"g" is gravitational acceleration. This information is in both Help (Variable Boundary Condition) and Manual (eq. 2.74). J.
Re: Question on hCritA
Thank you prof.
I have calculated hCritA and the values are within the recommended 150 m to 1000 m, eq. 2.74 helped, but help is missing the 'g'. Thanks a lot.
IK
I have calculated hCritA and the values are within the recommended 150 m to 1000 m, eq. 2.74 helped, but help is missing the 'g'. Thanks a lot.
IK
Re: Question on hCritA
It certainly is not (see the snapshot below). J.
 Attachments

 H1D help.png (127.74 KiB) Viewed 1577 times