Comparison of Two Solvers for Simulation of Single Bubble Rising Dynamics: COMSOL vs. Fluent
| Autor: | Maria Zednikova, Jakub Crha, Pavlína Basařová, Ondřej Kašpar, Marek C. Ruzicka |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multiphysics
Bubble 0211 other engineering and technologies Rotational symmetry 02 engineering and technology multiphase Deformation (meteorology) Computational fluid dynamics rising bubble 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics COMSOL 0103 physical sciences Fluent Volume of fluid method 021102 mining & metallurgy Physics business.industry Geology Mechanics Solver fluent Geotechnical Engineering and Engineering Geology Mineralogy volume of fluid business level set QE351-399.2 |
| Zdroj: | Minerals, Vol 11, Iss 452, p 452 (2021) Minerals Volume 11 Issue 5 |
| Popis: | Multiphase flows are a part of many industrial processes, where the bubble motion influences the hydrodynamic behavior of the batch. The current trend is to use numerical solvers that can simulate the movement and mutual interactions of bubbles. The aim of this work was to study how two commercial CFD solvers, COMSOL Multiphysics and Ansys Fluent, can simulate the motion of a single rising bubble in a stagnant liquid. Simulations were performed for spherical or slightly deformed bubbles (Db = 0.6, 0.8, and 1.5 mm) rising in water or in propanol. A simple 2D axisymmetric approach was used. Calculated bubble terminal velocities and bubble shape deformations were compared to both experimental data and theoretical estimations. Solver Comsol Multiphysics was able to precisely calculate the movement of smaller and larger bubbles due to the 2D rotational symmetry, better results were obtained for small spherical bubbles. The deformation of larger bubbles was calculated sufficiently. Solver Ansys Fluent, in the setting used, failed to simulate the motion of small bubbles due to parasitic currents but allowed for modeling of the motion of larger bubbles. However, the description of the bubble velocity and shape was worse in comparison with experimental values. |
| Databáze: | OpenAIRE |
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