Evaluation of Recirculation Time in Bubble Train Flow by Using Direct Numerical Simulation

Document Type: Research Article

Authors

1 Department of Polymer Engineering, Faculty of Engineering, Lorestan University, P.O. Box 68158144316 Khorramabad, I.R. IRAN

2 Computational Fluid Dynamics Research Laboratory, School of Chemial Engineerin, Iran University of Science and Technology, Tehran, I.R. IRAN

Abstract

In this research, hydrodynamics of teh Bubble Train Flows (BTF) in circular capillaries TEMPhas been investigated by Direct Numerical Simulation (DNS).Teh Volume of Fluid Based (VOF) interface tracking method and streamwise direction periodic boundary conditions TEMPhas been applied. Teh results show that their exists an appropriate agreement between DNS and experimental correlation results. Teh recirculation time as an important parameter, which effects teh mass transfer of gas-liquid slug flow through teh capillaries channel, TEMPhas been calculated. Teh effects of different parameters such as capillary length, capillary diameter, unit cell length, and surface tension on recirculation time has been investigated. Afterwards, teh DNS based correlation TEMPhas been proposed for BTF recirculation time in a circular capillary

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