Surface tension of esters. Temperature dependence of the influence parameter in density gradient theory with Peng-Robinson equation of state
A new temperature-dependent correlation for the reduced influence parameter of the density gradient theory, when used with the Peng-Robinson equation of state, is proposed and compared with other correlations found in the literature. The proposed correlation is linear in its two fitting parameters a...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X22004397 |
| Summary: | A new temperature-dependent correlation for the reduced influence parameter of the density gradient theory, when used with the Peng-Robinson equation of state, is proposed and compared with other correlations found in the literature. The proposed correlation is linear in its two fitting parameters and contains a universal exponent related to the one from the liquid-vapor phase transition universal scale law. The overall absolute deviation (OAAD) respect 1275 surface tension data for 39 esters is 1.37%. Only the proposal from Zuo and Stenby with OAAD = 1.29%, yields similar results with the same number of parameters.Fitting parameters for the new correlation proposed and those from Zuo and Stenby are given for the fluids considered in this work. |
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| ISSN: | 2214-157X |