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Numerical investigation of interfacial mass transfer in two phase flows using the VOF method

Özkan, Furkan; Wenka, Achim; Hansjosten, Edgar; Pfeifer, Peter; Kraushaar-Czarnetzki, Bettina

Abstract (englisch): A mass transfer model is developed using the volume-of-fluid (VOF) method with a piecewise linear interface calculation (PLIC) scheme in ANSYS FLUENT for a free-rising bubble. The mass flow rate is defined via the interface by Fick's law and added into the species equation as a source term in the liquid phase using the user-defined functions (UDFs) in ANSYS FLUENT. The interfacial concentration field for the mass flow rate is discretized by two numerical methods. One of them is based on the calculation of the discretization length between the centroid of the liquid volume and the interface using the liquid void fraction and interface normal vectors at the interface cells, while in the second method the discretization length is approximated using only the liquid void fraction at the interface cells. The influence of mesh size, schemes, and different Schmidt numbers on the mass transfer mechanism is numerically investigated for a free-rising bubble. Comparison of the developed mass transfer model with the theoretical results shows reasonable and consistent results with a smaller time-step size and with cell size.

Zugehörige Institution(en) am KIT Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator DOI: 10.1080/19942060.2015.1061555
ISSN: 1994-2060, 1997-003X
URN: urn:nbn:de:swb:90-621350
KITopen ID: 1000062135
HGF-Programm 37.03.02; LK 01
Erschienen in Engineering applications of computational fluid mechanics
Band 10
Heft 1
Seiten 100–110
Schlagworte interfacial mass transfer, VOF method, free-rising bubble
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