Talk:Twu-Sim-Tassone equation of state

a and b

Dear Joseph,

I have replaced the values that you added for $a$ and $b$ to be those found in the original publication (Eqs. 3 and 4 in Chorng H. Twu, Wayne D. Sim and Vince Tassone "A versatile liquid activity model for SRK, PR and a new cubic equation-of-state TST", Fluid Phase Equilibria 194-197 pp. 385-399 (2002)). The values that you inserted appear as Eqs. 3.3 and 3.4 in the Reference Guide of the UniSim Clean Fuels Property Package. Without having gone through the algebra, I shall err on the side of the caution and assume the values of Twu et al. are the correct ones. All the best, -- Carl McBride (talk) 12:41, 7 November 2011 (CET)