Editing Talk:Twu-Sim-Tassone equation of state

==a and b==
Dear [[User:Josephrpeterson | Joseph]], 

I have replaced the values that you added for <math>a</math> and <math>b</math> to be those  found in the original publication (Eqs. 3 and 4 in [http://dx.doi.org/10.1016/S0378-3812(01)00663-X 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 (June 2005 R350 Release) of the [http://hpsweb.honeywell.com/Cultures/en-US/Products/ControlApplications/simulation/UniSimDesign/default.htm 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, --[[User:Carl McBride | <b><FONT COLOR="#8B3A3A">Carl McBride</FONT></b>]] ([[User_talk:Carl_McBride |talk]]) 12:41, 7 November 2011 (CET)
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	I have replaced the values that you added for <math>a</math> and <math>b</math> to be those found in the original publication (Eqs. 3 and 4 in [http://dx.doi.org/10.1016/S0378-3812(01)00663-X 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 (June 2005 R350 Release) of the [http://hpsweb.honeywell.com/Cultures/en-US/Products/ControlApplications/simulation/UniSimDesign/default.htm 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, --[[User:Carl McBride \| <b><FONT COLOR="#8B3A3A">Carl McBride</FONT></b>]] ([[User_talk:Carl_McBride \|talk]]) 12:41, 7 November 2011 (CET)		I have replaced the values that you added for <math>a</math> and <math>b</math> to be those found in the original publication (Eqs. 3 and 4 in [http://dx.doi.org/10.1016/S0378-3812(01)00663-X 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 (June 2005 R350 Release) of the [http://hpsweb.honeywell.com/Cultures/en-US/Products/ControlApplications/simulation/UniSimDesign/default.htm 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, --[[User:Carl McBride \| <b><FONT COLOR="#8B3A3A">Carl McBride</FONT></b>]] ([[User_talk:Carl_McBride \|talk]]) 12:41, 7 November 2011 (CET)

	Addendum: the prefactors of <math>a</math> (0.427481) and <math>b</math> (0.086641) appear to be close to those of the [[Redlich-Kwong equation of state]]. --[[User:Carl McBride \| <b><FONT COLOR="#8B3A3A">Carl McBride</FONT></b>]] ([[User_talk:Carl_McBride \|talk]]) 17:31, 7 November 2011 (CET)