Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1563830 | Computational Materials Science | 2007 | 8 Pages |
Abstract
A novel apparatus, PeDro, was used to measure interfacial tension in a two-component system made of water and compressed carbon dioxide at temperatures ranging 278-335Â K and pressures 0.1-20Â MPa. Our optimized experimental setup utilized the quasi-static pendant drop method and ensured experimental errors below 2%. The interfacial tension showed a pronounced dependence on pressure and temperature. A regression function was derived that allows to interpolate between the experimental data with high precision. Molecular dynamics simulations were performed for liquid-liquid and liquid-vapor interfaces between water and carbon dioxide at elevated pressures. The interfacial tension was obtained from long constant-volume production runs as the difference between normal and tangential pressure components. The results showed a good agreement with experimental data, with our model system reproducing faithfully the pressure-temperature dependence of the interfacial tension.
Related Topics
Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
Bjørn Kvamme, Tatyana Kuznetsova, Andreas Hebach, Alexander Oberhof, Eivind Lunde,