Size prediction of drops formed by dripping at a micro T-junction in liquid–liquid mixing

Yeom, Su-Jin; Lee, Sang Yong

doi:10.1016/j.expthermflusci.2010.10.009

Cited by 35 publications

(25 citation statements)

References 26 publications

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“…The droplet size is not very uniform because of the instability of the jetting pattern. Hence, no reasonable correlation formula that describes the size of a jetting droplet is available . The gravity effect has not been included in all aforementioned models.…”

Section: Introductionmentioning

confidence: 99%

Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect

Zhang

Wang

et al. 2016

AIChE Journal

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A special system of concentrated sulfuric acid (H2SO4) and n‐hexane was used to study the droplet formation in a glass T‐junction microchannel with H2SO4 as the continuous phase. The effects of capillary number, flow ratio, and viscosity ratio on the droplet formation were investigated. The effect of gravity was explored by changing the flow direction in the microchannel. Results showed that the formation of transition flow pattern from squeezing to dripping is much easier for this special system compared with common aqueous/organic systems. This phenomenon is due to the considerably higher viscosity of H2SO4 than that of common aqueous phase and the higher density difference of the system compared with those of common systems. In addition to capillary number and flow ratio, gravity evidently affects the formation of droplets and flow patterns. The droplet size is smaller than that during the horizontal flow when the flow direction is consistent with gravity. By contrast, flow direction contrary to that of gravity results in larger droplet size than that at horizontal flow. This phenomenon provides guidance on the operation of these special systems in microchannels. Finally, mathematical models of droplet size at different flow patterns have been established, and these models can predict droplet size very well. This study could be helpful to extend the application of microreactors to new working systems. © 2016 American Institute of Chemical Engineers AIChE J, 62: 4564–4573, 2016

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Section: Introductionmentioning

confidence: 99%

Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect

Zhang

Wang

et al. 2016

AIChE Journal

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“…It is well known that the viscosity of the droplet phase affects both the operational range of the flow rates of droplet generators, and the tightness of the volume distribution of the droplets (Tice et al 2004;Seo et al 2005;Husny and Cooper-White 2006;Nie et al 2008;Christopher et al 2008;Berthier et al 2010;Yeom and Lee 2011). For example, Berthier et al (2010) have shown that liquids of higher viscosities produce smaller droplets.…”

Section: Formation Of Concentration Gradations From the Input Streamsmentioning

confidence: 99%

Microfluidic architectures for efficient generation of chemistry gradations in droplets

Węgrzyn

Samborski

Reissig

et al. 2012

Microfluid Nanofluid

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We demonstrate a strategy for construction of high-throughput microfluidic systems generating gradations of chemistry in micro-droplets. The productivity of the systems that we propose is limited only by the maximum rate of the droplet formation, and does not need to be limited by the rate of mixing. We also analyze the use of the same strategy for the generation of concentration gradation in the streams of droplets comprising mixtures of liquids of different viscosities. The devices preserve the required distribution of compositions, while allowing the volume of the droplets to be tuned over almost two orders of magnitude (i.e. between 3 and 80 nL).

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“…[1][2][3] In the past few years, 3D vessel bioprinter has attracted extensive attentions due to its application in artificial blood vessel, the functional blood vessel can be produced in such bioprinter system under certain conditions, the formation of droplets with micro-fluidic has been widely investigated due to the application of drag delivery, organ regeneration, tissue engineering, [4] many devices with the different generating mechanism have were demanded. For example, Sujin Yeom et al [15] show that the droplets form process in the T-junction through numerical simulation and analysis, and predicted size of drops formed by dripping at a micro T-junction.…”

Section: Introductionmentioning

confidence: 99%

The Research on Biosynsphere Damage Analysis Based on 3D Vessel Bioprinter

Liu¹,

Zhou²,

Lan³

et al. 2016

Proceedings of the 2016 International Conference on Mechatronics Engineering and Information Technology

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Abstract. 3D bioprinter is an emerging interdisciplinary technology, which offers a new plan not only for the functional materials, ( droplets, drug delivery, organ regeneration, tissue engineering), but also for the new artificial vessel called 3D vessel bioprinter. In this paper, we developed a theoretical proposal to analyze the biosynsphere mechanical propertie under the multilayer fluid based on the 3D bioprinter, further analyze the broken mechanism to verify the theoretical. Our investigation shows that the outer fluid and inner fluid have difference effect on droplet, with the increase pressure of outer fluid, the force of droplet becomes greater, which revealed that the better pressure plays an important role in protecting the droplet.

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Size prediction of drops formed by dripping at a micro T-junction in liquid–liquid mixing

Cited by 35 publications

References 26 publications

Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect

Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect

Microfluidic architectures for efficient generation of chemistry gradations in droplets

The Research on Biosynsphere Damage Analysis Based on 3D Vessel Bioprinter

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Size prediction of drops formed by dripping at a micro T-junction in liquid–liquid mixing

Cited by 35 publications

References 26 publications

Droplet formation of H2SO4/alkane system in a T‐junction microchannel: Gravity effect

Droplet formation of H2SO4/alkane system in a T‐junction microchannel: Gravity effect

Microfluidic architectures for efficient generation of chemistry gradations in droplets

The Research on Biosynsphere Damage Analysis Based on 3D Vessel Bioprinter

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Product

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Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect

Droplet formation of H₂SO₄/alkane system in a T‐junction microchannel: Gravity effect