Suspicious viscosity parameters for solvents

[jonwzheng]

Overview

Numerous viscosity correlations in the RMG database are suspicious / lead to strange viscosity values, see (by solvent order):
197: N,N-dibutylbutan-1-amine
169: ethane-1,2-diol
161: 2-(2-hydroxyethoxy)ethanol
139: pentane-1,5-diol (to a lesser extent)
138: butane-1,4-diol (to a lesser extent)
137: propane-1,3-diol (to a lesser extent)
133: 1,1,2,2-tetrabromoethane
111: 2-methoxy-2-methylbutane
104: pentan-2-ol
102: 2-ethoxyethanol
98: 2-ethylhexan-1-ol
96: 4-methylpentan-2-ol <note, this is so high that it leads to an overflow error>
86: 1,2,4-trimethylbenzene
79: butan-2-ol
76: hexafluorobenzene

Solution

Someone should double-check these values - I don't currently have access to the original print resource (Viswanath, D. S., Ghosh, T. K., Prasad, D. H. L., Dutt, N. V. K., and Rani, K. Y. (2007) Viscosity of Liquids. Springer, The Netherlands: Dordrecht.).
We can also just replace the suspicious solvents with values from DIPPR which are easily accessible to us and might be more accurate?
Are we also sure that the values from the Viswanath manuscript match the functional form used in RMG?

[jonwzheng]

It doesn't look like these are due to typos from parsing the digital reference. And the T values are in the valid T range.
I wonder if there's an OCR issue? I requested a copy of the original hardcover to double check...

[jonwzheng]

The OCR is fine; these are just typos in the original print source.

Using the supplied viscosities given at reference temperatures, I was able to figure out typos in the correlations, verifying that fixing them gives the same value.

For example, 79: butan-2-ol: the A parameter should be -106.38 rather than -10.638. I will submit a PR that fixes these.

[jonwzheng]

Fixed in #642