The accurate prediction of void fraction profiles near solid walls using the two-fluid model is still an unresolved issue. These profiles result from the combination of two factors: a) forces acting on the bubbles, and, b) geometric constraints imposed by their shape. We propose herein a two-fluid model that involves a particle-center-averaging procedure for the disperse phase, and a reinterpretation and postprocessing of the results obtained. This center-averaged approach averages the disperse phase (bubbles) based on a particle center indicator function, while using the standard phase indicator averaging for the continuous phase (liquid). The solution fields obtained are then postprocessed to introduce the geometry of the bubbles in order to recover the values that should be representative of measured fields. The key idea here is to separate the geometric aspect from the dynamic aspect of the problem into two independent, successive steps. The new model may be easily incorporated into existing two-fluid model codes. Results obtained with the new model showing agreement with experimental data (Moursali et al, 1995) are also presented.
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ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
July 14–18, 2002
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3616-9
PROCEEDINGS PAPER
A Particle-Center-Averaged Two-Fluid Model for Wall-Bounded Bubbly Flows
Axel E. Larreteguy,
Axel E. Larreteguy
Universidad Argentina de la Empresa, Buenos Aires, Argentina
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Donald A. Drew,
Donald A. Drew
Rensselaer Polytechnic Institute, Troy, NY
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Richard T. Lahey, Jr.
Richard T. Lahey, Jr.
Rensselaer Polytechnic Institute, Troy, NY
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Axel E. Larreteguy
Universidad Argentina de la Empresa, Buenos Aires, Argentina
Donald A. Drew
Rensselaer Polytechnic Institute, Troy, NY
Richard T. Lahey, Jr.
Rensselaer Polytechnic Institute, Troy, NY
Paper No:
FEDSM2002-31212, pp. 303-318; 16 pages
Published Online:
February 24, 2009
Citation
Larreteguy, AE, Drew, DA, & Lahey, RT, Jr. "A Particle-Center-Averaged Two-Fluid Model for Wall-Bounded Bubbly Flows." Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 2: Symposia and General Papers, Parts A and B. Montreal, Quebec, Canada. July 14–18, 2002. pp. 303-318. ASME. https://doi.org/10.1115/FEDSM2002-31212
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