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Modélisation du transfert de chaleur et de masse pour un écoulement multiphasique à composants multiples par mécanique des fluides numérique.

Heat and mass transfer modeling for multicomponent multiphase flow with CFD.

Auteurs : PADOIN N., DAL' TOÉ A. T. O., RANGEL L. P., et al.

Type d'article : Article

Résumé

Heat and mass transfer take place in a large number of processes. These phenomena are encountered in systems comprised of two or more phases, in which at least one of them is a mixture of many chemical species. The predictability of such multiphase and multicomponent systems plays a major role in the efficient design and operation of equipment and processes, where CFD has been frequently applied successfully over the past decade. Modeling multicomponent flow remains a challenge in relation to both micro or macro systems. In this study, simulations were carried out with the commercial code ANSYS® CFD (FLUENT®), version 14.0, and customized functions developed to predict the equilibrium compositions and temperature of a vapor–liquid system. A preliminary study on a binary mixture (water/air) was conducted in order to validate the results obtained with the commercial code using the data obtained from a standard psychrometric chart. In addition, simulations were carried out for a mixture of four pure hydrocarbons (methane, n-pentane, n-hexane and n-octane). Thus, a complete multicomponent mass transfer theory, based on Maxwell–Stefan’s equations, was applied as a customized function code, which can be used to calculate high flux corrections and the convective mass flux. The results were verified with predicted values obtained using the steady-state process simulator PRO/II®, version 8.2.

Détails

  • Titre original : Heat and mass transfer modeling for multicomponent multiphase flow with CFD.
  • Identifiant de la fiche : 30011526
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 73
  • Date d'édition : 06/2014
  • DOI : http://dx.doi.org/10.1016/j.ijheatmasstransfer.2014.01.075

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