Effects of inlet arrangements on liquid-liquid flow patterns in cross-junction square microchannels

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Abstract

Due to the high surface area to volume ratios leading to intensified heat and mass transfer rates, microreactors have been subject of interest for some time. Liquid-liquid two-phase flow is a very common phenomenon in microchannels. During the scale-up using a numbering-up approach, rectangular and square microchannels are preferred to circular microchannels in terms of easier integration of the former with a less volume. Therefore, liquid-liquid two-phase flow in non-circular microchannels has been investigated recently. However, there are still gaps in the fundamental understanding of liquid-liquid two-phase flow, such as the effect of inlet junctions or arrangements on flow patterns in non-circular microchannels. The present work aims to study the effect of inlet arrangements on liquid-liquid two-phase flow dynamics and flow patterns of square glass microchannels. In this paper, oil is used as the dispersed phase and de-ionized water is used as the continuous phase. The special inlet arrangement in the cross-junction is compared to these common inlet arrangements of T-junction and cross-junction square microchannels. The effect of the inlet continuous phase velocity on the slug length is studied. Then, the slug lengths with the same inlet velocities of the three inlets and equal velocities of the two phases are carried out, respectively. Meanwhile, typical liquid-liquid flow pattern transitions are achieved at specific conditions. Finally, a special phenomenon without the droplet flow pattern is introduced, due to introduction of the novel inlet arrangement.

Detaljer

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Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik
Originalspråkengelska
Titel på värdpublikationMicro- and Nano-Systems Engineering and Packaging
FörlagAmerican Society Of Mechanical Engineers (ASME)
Volym10
ISBN (elektroniskt)9780791858455
StatusPublished - 2017
PublikationskategoriForskning
Peer review utfördJa
EvenemangASME 2017 International Mechanical Engineering Congress and Exposition, IMECE 2017 - Tampa, USA
Varaktighet: 2017 nov 32017 nov 9

Konferens

KonferensASME 2017 International Mechanical Engineering Congress and Exposition, IMECE 2017
Förkortad titelIMECE 2017
LandUSA
OrtTampa
Period2017/11/032017/11/09