Comparative study of wall-force models for the simulation of bubbly flows
Comparative study of wall-force models for the simulation of bubbly flows
Rzehak, R.; Krepper, E.; Lifante, C.
Abstract
Accurate numerical prediction of void-fraction profiles in bubbly multiphase-flow relies on suitable closure models for the momentum exchange between liquid and gas phases. We here consider forces acting on the bubbles in the vicinity of a wall. A number of different models for this so-called wall-force have been proposed in the literature and are implemented in widely-used CFD-codes. Simulations using a selection of these models are compared with a set of experimental data on bubbly air-water flow in round pipes of different diameter. Based on the results, recommendations on suitable closures are given.
Keywords: dispersed gas liquid multiphase flow; bubble forces; Euler Euler two fluid model; CFD simulation; model validation
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Nuclear Engineering and Design 253(2012), 41-49
DOI: 10.1016/j.nucengdes.2012.07.009
Cited 59 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-16824