Dear All,

I have some confusion about "radial distribution functions" implemented in Fluent 6.3. Five options are "lun-et-al, syamlal-obrien, ma-ahmadi, arastoopour and user-defined".

I would like to know when I choose "lun-et-al", which one of the equations will be chosen?

(Eqn-1) Go,ss = ( 1 â€" (Eps/Eps,max) ) ^ (-2.5 Eps,max)

(Eqn-2) Go,ss = (1- (Eps/Eps,max)^(1/3) ) ^ (-1)

My guess: I guess "Eqn-2" will be chosen which is actually proposed by "Ogawa-et-al-1980". Why is the name Lun-et-al is given? "Lun-et-al" actually refers to "Eqn-1"….

Regards,

[jipaz]

The second one.

In 1980 Osawa et al proposed the original equation, and later at 1984 Lun et al porposed some modifications. This is why that eq is named Lun et al:

J. Fluid Mech. (1984), vol. 140, pp. 223-256

Kinetic theories for granular flow : inelastic particles in Couette flow and slightly inelastic particles in a general flowfield.
By C. K. K. Lun, S. B. Savage, D. J. Jeffrey and N. Chepuniy

[eduardors]

Originally Posted by jipaz

The second one.

In 1980 Osawa et al proposed the original equation, and later at 1984 Lun et al porposed some modifications. This is why that eq is named Lun et al:

J. Fluid Mech. (1984), vol. 140, pp. 223-256

Kinetic theories for granular flow : inelastic particles in Couette flow and slightly inelastic particles in a general flowfield.
By C. K. K. Lun, S. B. Savage, D. J. Jeffrey and N. Chepuniy

Thank you!