Influence of Liquid Viscosity on the Taylor Bubble Shape Under a Laminar Condition in the Falling Film Region and a Constant Froude Number

Boonchai Lertnuwat

doi:10.15866/ireme.v12i12.15730

Influence of Liquid Viscosity on the Taylor Bubble Shape Under a Laminar Condition in the Falling Film Region and a Constant Froude Number

Boonchai Lertnuwat^(1*)

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/ireme.v12i12.15730

Abstract

The purpose of this work is to computationally find how the liquid viscosity affects the shape of an air Taylor bubble, which rises up in a vertical pipe when the flow in the falling film region is laminar and the Froude number is approximately 0.35. Five liquid viscosities (0.015, 0.020, 0.025, 0.030 and 0.035 Pa s) were selected as sample cases for the investigation. The grid search method was employed to find the appropriate shape of a Taylor bubble for each selected liquid viscosity by considering the pressure distribution of the air inside the bubble. The computational result and the mathematical analysis show that the Taylor bubble shape will be slenderer if the liquid viscosity is higher.
Copyright © 2018 Praise Worthy Prize - All rights reserved.

Keywords

Froude Number; Laminar; Slug Flow; Taylor Bubble; Viscosity

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