Heat and mass transfer modeling for multicomponent multiphase flow with CFD

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 th...

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Vydáno v:International journal of heat and mass transfer Ročník 73; s. 239 - 249
Hlavní autoři: Padoin, Natan, Dal’Toé, Adrieli T.O., Rangel, Leonardo P., Ropelato, Karolline, Soares, Cíntia
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier Ltd 01.06.2014
Témata:
CFD
Customizing
Eulerian two-fluid model
Flux
Heat transfer
Mass transfer
Mathematical models
Maxwell–Stefan’s equations
Methane
Modelling
Multicomponent mass transfer
Multiphase flow
Simulation
CFD
Eulerian two-fluid model
Multicomponent mass transfer
Multiphase flow
Maxwell–Stefan’s equations
Heat transfer
ISSN:0017-9310, 1879-2189
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Shrnutí: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.
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ISSN:0017-9310
1879-2189
DOI:10.1016/j.ijheatmasstransfer.2014.01.075