Original title: CFD Simulation of a Sub-millimetre Rising Bubble in a Stagnant Liquid.
Authors: Crha, Jakub ; Basařová, P. ; Kašpar, O.
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2020, Praha (CZ), 20200219
Year: 2020
Language: eng
Abstract: Hydrodynamics of the multiphase apparatus is strongly affected by fluids used in the process. One of the main quantities, which determine the hydrodynamic behaviour is the rising velocity of gaseous bubbles. This velocity can be determined easily in small scale apparatuses, but it can be much more challenging in industrial-scale devices. For that reason, mathematical modeling is used. COMSOL Multiphysics, finite element CFD solver, was used to describe the behaviour of the single bubble rising in aqueous solutions of ethanol and n-propanol. Aqueous solutions of low-carbon alcohols are extensively used in many multiphase chemical processes such as distillation, flotation and in multiphase reactors. Bubble velocities and shapes obtained from the simulation were compared to experimental and theoretical values. Two initial diameters of bubbles were used – 0.6 and 0.8 mm. Terminal velocities and shapes deformations obtained from COMSOL of 0.6 mm bubble were in an agreement with theoretical and experimental values.
Keywords: bubble; level set; single
Project no.: GA19-09518S (CEP)
Funding provider: GA ČR
Host item entry: Proceedings, ISBN 978-80-87012-74-1, ISSN 2336-5781
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
External URL: http://www2.it.cas.cz/fm2015/im/admin/showfile/data/my/Papers/2020/05-TPFM2020.pdf
Original record: http://hdl.handle.net/11104/0317882

Permalink: http://www.nusl.cz/ntk/nusl-437954


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