CFD Simulation of a Sub-Millimeter Rising Bubble in a Stagnant Liquid

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43921245" target="_blank" >RIV/60461373:22340/20:43921245 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/TPFM.2020.005" target="_blank" >https://doi.org/10.14311/TPFM.2020.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/tpfm.2020.005" target="_blank" >10.14311/tpfm.2020.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CFD Simulation of a Sub-Millimeter Rising Bubble in a Stagnant Liquid

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

CFD Simulation of a Sub-Millimeter Rising Bubble in a Stagnant Liquid

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA19-09518S" target="_blank" >GA19-09518S: Dynamika nestacionárních dějů v plyno-kapalinových soustavách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings Topical Problems of Fluid Mechanics 2020

ISBN

978-80-87012-74-1

ISSN

2336-5781

e-ISSN

—

Počet stran výsledku

7

Strana od-do

35

Název nakladatele

Ústav termomechaniky AV ČR, v.v.i.

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

19. 2. 2020

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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