There is increasing interest in high temperature and pressure processing of emulsions (e.g. emulsion polymerization, enhanced oil recovery). Typical conditions of interest are > 100 °C and > 1 bar (pressurized process to maintain liquid state). Dynamic drop tensiometer techniques are available for measuring interfacial tension (IFT) from droplet curvature at high T and P up to 200 °C and 200 bar, for example. See Chaverot et al. as an example.
The 9th Challenge aims to test the ability of molecular modeling approaches to predict water/oil IFT at elevated T and P for three different oils:
The state conditions will be something on the order of:
The specific state conditions for the challenge will be announced in early 2016 with the challenge concluding before the AIChE Annual Meeting in November.
In is anticipated that a future challenge will build on this 9th challenge to incorporate polymeric or otherwise more complex oil phase or the effect of surfactant of water/oil IFT.
Here are a few references that may be useful for model validation: