Shapes of an air Taylor bubble in stagnant liquids influenced by different surface tensions

• Autorzy: Lertnuwat B.

Identyfikatory

DOI

10.1515/ijame-2018-0005

• Języki publikacji: EN

Abstrakty

EN

The aim of this work is to propose an empirical model for predicting shapes of a Taylor bubble, which is a part of slug flows, under different values of the surface tension in stagnant liquids by employing numerical simulations. The k - turbulence model was used in the framework of finite volume method for simulating flow fields in a unit of slug flow and also the pressure distribution on a Taylor bubble surface. Assuming that an air pressure distribution inside the Taylor bubble must be uniform, a grid search method was exploited to find an appropriate shape of a Taylor bubble for six values of surface tension. It was found that the shape of a Taylor bubble would be blunter if the surface tension was increased. This was because the surface tension affected the Froude number, controlling the flow around a Taylor bubble. The simulation results were also compared with the Taylor bubble shape, created by the Dumitrescu-and-Taylor model and former studies in order to ensure that they were consistent. Finally, the empirical model was presented from the simulation results.

Słowa kluczowe

EN

Dumitrescu-and-Taylor model; Froude number; surface tension; Taylor bubble; turbulence

PL

turbulencje; napięcie powierzchniowe; model Taylora

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2018
• Tom: Vol. 23, no. 1
• Strony: 79--90
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Lertnuwat B.

• Department of Mechanical Engineering, Faculty of Engineering Chulalongkorn University, Bangkok, 10330 THAILAND

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)