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

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

Keywords

• recirculation time
• bubble train flows (btf)
• direct numerical simulation (dns)
• volume of fluid (vof)
• circular capillaries