Abstract

MELO ZAMBRANO, Andrés Felipe  and  RATKOVICH, Nicolas. CFD modeling of Air-Water Two-phase Annular Flow before a 90° elbow. rev.ing. [online]. 2015, n.43, pp.16-23. ISSN 0121-4993.  https://doi.org/10.16924/riua.v0i43.843.

In this work, a Computational Fluid Dynamics model is presented for the analysis of annular air-water flow before a 90° bend with a radius to diameter ratio (r/D) of 1.5, implementing the Volume of Fluid (VOF) model in STAR-CCM+ v9.2. An 8m-long vertical tube with an internal diameter of 0.076 m was studied for ten different air and water superficial velocities. The mean void fraction was compared between the experimental measurements, the CFD model, and a model in OLGA. The CFD and OLGA model presented an average relative error of 8.79 % and 17.05 %, respectively.

Keywords : Annular Flow; CFD; Two-Phase Flow; Water-Air System.

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