Characterisation of gas–liquid two-phase flow inside capillaries

Laborie, Stéphanie; Cabassud, Corinne; Durand-Bourlier, L.; Laîné, J.M.

doi:10.1016/s0009-2509(99)00146-3

Cited by 169 publications

(113 citation statements)

References 15 publications

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“…Moreover, this correlation does not consider the impact of surface tension given by the fact that surface tension seems to have no significant effect on the bubble length in our experimental conditions. Similar results showing negligible influence of surface tension on the bubble length produced in the squeezing regime can be also found in the literature [22,35,37,40]. For example, Fu et al [37] pointed out that the surface tension measured under static conditions could be irrelevant to a fast and dynamical phenomenon for bubble formation.…”

Section: Empirical Correlation For Bubble Length Predictionsupporting

confidence: 83%

Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction

Dang

Yue

Chen

et al. 2013

Chemical Engineering Journal

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Section: Empirical Correlation For Bubble Length Predictionsupporting

confidence: 83%

Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction

Dang

Yue

Chen

et al. 2013

Chemical Engineering Journal

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“…The bubble generating frequency is a linear function of the Reynolds number. As the viscosity increases the slope increases in the same manner as that of Laborie et al [46]. The BMMR result matches with that of the single channel [46].…”

Section: Comparison To Single Channel -Bubble Generation Frequency Ansupporting

confidence: 83%

“…As the viscosity increases the slope increases in the same manner as that of Laborie et al [46]. The BMMR result matches with that of the single channel [46]. Therefore, even with the non-uniformity in the flow rates and slug and bubble lengths, the BMMR reactor still shows similar performance to that of a single channel.…”

Section: Comparison To Single Channel -Bubble Generation Frequency Ansupporting

confidence: 76%

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Numbered-up gas–liquid micro/milli channels reactor with modular flow distributor

Al-Rawashdeh

Nijhuis

et al. 2012

Chemical Engineering Journal

105

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Gas-liquid processing in microreactors remains mostly restricted to the laboratory scale due to the complexity and expenditure needed for an adequate numbering-up with a uniform flow distribution. Here, the numbering-up is presented for multiphase (gas-liquid) flow in microreactor suitable for a production capacity of kg/h. Based on the barrier channels concept, the barrier-based micro/milli reactor (BMMR) is designed and fabricated to deliver flow non-uniformity of less than 10%. The BMMR consists of eight parallel channels all operated in the Taylor flow regime and with a liquid flow rate up to 150 mL/min. The quality of the flow distribution is reported by studying two aspects. The first aspect is the influence of different viscosities, surface tensions and flow rates. The second aspect is the influence of modularity by testing three different reaction channels type: (1) square channels fabricated in a stainless steel plate, (2) in a glass plate, and (3) circular channels (capillaries) made of stainless steel.Additionally, the BMMR is compared to that of a single channel regard the slug and bubble lengths and bubble generation frequency. The results pave the ground for bringing multiphase flow in microreactor one step closer for large scale production via numbering-up.

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“…Multiple investigations of minichannels ascertained several characteristic flow regimes [9,[17][18][19][20][21][22]. Four of them were established to be typical for gas-liquid flows: bubbly flow, Taylor flow, churn flow, and film flow, occurring with increasing gas velocity.…”

Section: Concept Of Needle Distributormentioning

confidence: 99%

Homogeneous Gas‐Liquid Distribution for Monolithic Structures via a Needle Distributor

et al. 2017

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Dedicated to Professor Rüdiger Lange on the occasion of his 65th birthday Structured catalysts are a widely discussed approach for process intensification of chemical multiphase reactors. But equal to common catalyst structures, homogeneous educt distribution along the catalytic surface is mandatory for high reactor performance. Especially monolithic structures require a homogeneous initial fluid distribution. A novel distribution concept for gas-liquid flow through arbitrary channel matrices is presented. It is based on the injection principle where gas and liquid are inserted directly into the channels. A prototype for different cell densities was built and tested by various measurement techniques: gravimetry, X-ray tomography, and an optical fiber sensor. Additionally, the flow regime per channel was detected as equal to single-channel conditions.

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Characterisation of gas–liquid two-phase flow inside capillaries

Cited by 169 publications

References 15 publications

Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction

Formation characteristics of Taylor bubbles in a microchannel with a converging shape mixing junction

Numbered-up gas–liquid micro/milli channels reactor with modular flow distributor

Homogeneous Gas‐Liquid Distribution for Monolithic Structures via a Needle Distributor

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