Molecular modelling and simulation of the surface tension of real quadrupolar fluids
| Autor: | Peter Klein, Stephan Werth, Katrin Stöbener, Karl-Heinz Küfer, Hans Hasse, Martin Horsch |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
FOS: Computer and information sciences
Materials science Vapor pressure Applied Mathematics General Chemical Engineering chemistry.chemical_element Thermodynamics FOS: Physical sciences General Chemistry Condensed Matter - Soft Condensed Matter Computational Physics (physics.comp-ph) Propyne Industrial and Manufacturing Engineering Refrigerant Surface tension Sulfur hexafluoride Computational Engineering Finance and Science (cs.CE) chemistry.chemical_compound chemistry Fluorine Vapor–liquid equilibrium Soft Condensed Matter (cond-mat.soft) Computer Science - Computational Engineering Finance and Science Physics - Computational Physics Carbon monoxide |
| Popis: | Molecular modelling and simulation of the surface tension of fluids with force fields are discussed. Twenty-nine real fluids are studied, including nitrogen, oxygen, carbon dioxide, carbon monoxide, fluorine, chlorine, bromine, iodine, ethane, ethylene, acetylene, propyne, propylene, propadiene, carbon disulfide, sulfur hexafluoride, and many refrigerants. The fluids are represented by two-center Lennard–Jones plus point quadrupole models from the literature. These models were adjusted only to experimental data of the vapor pressure and saturated liquid density so that the results for the surface tension are predictions. The deviations between the predictions and experimental data for the surface tension are of the order of 20%. The surface tension is usually overestimated by the models. For further improvements, data on the surface tension can be included in the model development. A suitable strategy for this is multi-criteria optimization based on Pareto sets. This is demonstrated using the model for carbon dioxide as an example. |
| Databáze: | OpenAIRE |
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