Prediction of isochoric heat capacity : discrete versus continuous potentials
ARTIGO
Inglês
Prediction of derivative properties, such as the isochoric heat capacity, remains a real challenge for equations of state. Molecular-based equations of state are derived through a set of approximations, e. g., perturbation theory. The subtleness of these approximations, inaccessible to such a...
Prediction of derivative properties, such as the isochoric heat capacity, remains a real challenge for equations of state. Molecular-based equations of state are derived through a set of approximations, e. g., perturbation theory. The subtleness of these approximations, inaccessible to such a macroscopic description, might be tested with molecular simulations via top-down approaches, where the model parameters used in the molecular simulations are taken from a molecular-based equation of state. In this study, we have calculated the isochoric heat capacity of carbon dioxide comparing three different equations of state based on perturbation theory and two different force fields derived from two of the equations of state. The effects of different potentials (discrete and continuous potentials) and the approximations taken in the derivation of the equations of state were thoroughly analyzed. No model was able to accurately predict heat capacity, but the ones using continuous potentials provided the best results
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2018/02713-8
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
Fechado
Prediction of isochoric heat capacity : discrete versus continuous potentials
Prediction of isochoric heat capacity : discrete versus continuous potentials
Fontes
Fluid phase equilibria Vol. 506 (Feb., 2020), n. art. 112380 |