Breakup dynamics of gas-liquid interface during Taylor bubble formation in a microchannel flow-focusing device

Sökning: L773:0894 1777 > Breakup dynamics of...

Li, Xingchen (författare): Lund University,Lunds universitet,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH,National University of Defense Technology

Huang, Yiyong (författare): Academy of Military Science of the Chinese People's Liberation Army

Chen, Xiaoqian (författare): Academy of Military Science of the Chinese People's Liberation Army

Sunden, Bengt (författare): Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH

Wu, Zan (författare): Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH

(creator_code:org_t)

Elsevier BV, 2020
2020
Engelska.
Ingår i: Experimental Thermal and Fluid Science. - : Elsevier BV. - 0894-1777. ; 113

Relaterad länk:: http://dx.doi.org/10...; visa fler...; https://lup.lub.lu.s...; https://doi.org/10.1...; visa färre...

Abstract Ämnesord

Stäng

This work aims to investigate the breakup dynamics of the gas-liquid interface during bubble formation in a microchannel flow-focusing device. An interface tracking method is developed to capture the profiles of the gaseous thread evolution. The results show that the pinch-off period can be further divided into a liquid squeezing stage and a free pinch-off stage in both the radial and axial directions. The time domain criterion between these two stages in a low viscous liquid, with Ohnesorge numbers Oh≪1, is proved to be shorter than the capillary time. The effects of surface tension, viscosity and gas inertial force exerting on the interface during the free pinch-off stage are proved similar to those in a quiescent liquid pool. The power law of the minimum diameter at the gaseous thread to the pinch-off remaining time in the present experiments agrees with previous studies in both ranges (1/3 to 1/2) and tendency.

Av författaren/redakt...: Li, Xingchen; Huang, Yiyong; Chen, Xiaoqian; Sunden, Bengt; Wu, Zan

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