Implicitly coupled phase fraction equations for polydisperse flows
Autor: | Alberto Ceschin, Robert Keser, Hong G. Im, Hrvoje Jasak, Michele Battistoni |
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Rok vydání: | 2020 |
Předmět: |
validation
Engineering business.industry multiphase flow Applied Mathematics Mechanical Engineering Multiphase flow Computational Mechanics Foundation (engineering) Eulerian multifluid model 01 natural sciences Eulerian multifluid model multiphase flow OpenFOAM verificationpolydisperse bubbly flow validation 010305 fluids & plasmas Computer Science Applications Physics::Fluid Dynamics 010101 applied mathematics Mechanics of Materials 0103 physical sciences OpenFOAM Applied mathematics 0101 mathematics verification business Phase fraction polydisperse bubbly flow |
Zdroj: | International Journal for Numerical Methods in Fluids. 93:1627-1644 |
ISSN: | 1097-0363 0271-2091 |
Popis: | This work presents the implementation, verification and the validation of an incompressible Eulerian multi-fluid model for polydisperse flows. The proposed model uses a novel monolithic, i.e. implicitly coupled phase continuity equation for an arbitrary number of fluids, where the breakup source and sink terms are handled implicitly in the block-system. The implemented model is tested for an upward bubbly flow inside a large vertical pipe. The selected flow conditions exhibit both breakup and coalescence. The grid refinement study is conducted on four structured grids with varying levels of refinement. In the validation section, the numerical results are compared to the TOPFLOW experimental measurements. The last presented test examines the performance of the novel implicitly coupled phase continuity equation to the corresponding segregated formulation and the standard segregated formulation. The performance is evaluated by comparing the conservation error over the non- linear iterations. The presented model exhibits good agreement with the experimental measurements and gives stable results on various grids with different levels of refinement. Moreover, the implicit coupling reduces the conservation error during the calculation. |
Databáze: | OpenAIRE |
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