Motion of Long Levitating Drops in Tubes in an Anti-Bretherton Configuration

Favreau, Peter F.; Duchesne, Alexis; Zoueshtiagh, Farzam; Baudoin, Michaël

doi:10.1103/physrevlett.125.194501

Cited by 5 publications

(5 citation statements)

References 41 publications

(50 reference statements)

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“…In this case, a thin air layer forms between the droplet and the capillary This reduces drastically the droplet friction on the surface and lead to homogenous liquid speed inside the droplet. A model (detailed on Section S6, Supporting Information) based on the work of Favreau et al [30] exhibits a droplet speed that is one order of magnitude higher than our experimental one. Therefore, even if this model is rather simple, it seems unlikely that our droplet is fully detached from the capillary wall.…”

Section: Droplet Volume and Speedcontrasting

confidence: 45%

“…The slipping of the droplet could be also explained by gas entrapment between the droplet and the surface [28] that would occur at relatively small speed because of the hydrophobic surface and remain stable due to the small dimension of the tube which increases such stability. [29] Full levitating short liquid short droplets (with a maximum length of 5 time the diameter) have also been reported on hydrophillic capillary [30] for important capillary number (C a ≈ 1). In this case, a thin air layer forms between the droplet and the capillary This reduces drastically the droplet friction on the surface and lead to homogenous liquid speed inside the droplet.…”

Section: Droplet Volume and Speedmentioning

confidence: 91%

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Microfluidics at Fiber Tip for Nanoliter Delivery and Sampling

et al. 2021

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Delivery and sampling nanoliter volumes of liquid can benefit new invasive surgical procedures. However, the dead volume and difficulty in generating constant pressure flow limits the use of small tubes such as capillaries. This work demonstrates sub-millimeter microfluidic chips assembled directly on the tip of a bundle of two hydrophobic coated 100 µm capillaries to deliver nanoliter droplets in liquid environments. Droplets are created in a specially designed nanopipette and propelled by gas through the capillary to the microfluidic chip where a passive valve mechanism separates liquid from gas, allowing their delivery. By adjusting the driving pressure and microfluidic geometry, both partial and full delivery of 10 nanoliter droplets with 0.4 nanoliter maximum error, as well as sampling from the environment are demonstrated. This system will enable drug delivery and sampling with minimally invasive probes, facilitating continuous liquid biopsy for disease monitoring and in vivo drug screening.

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Section: Droplet Volume and Speedcontrasting

confidence: 45%

Section: Droplet Volume and Speedmentioning

confidence: 91%

Microfluidics at Fiber Tip for Nanoliter Delivery and Sampling

et al. 2021

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“…technologies have brought significant contributions to the field of microfluidics for precision manipulation techniques, [1][2][3][4] notably due to their relatively low power requirement and superior biocompatibility. 5,6 Ultrasonic actuators have demonstrated the ability to accomplish various microfluidic functions such as separation, 3,[7][8][9][10][11] patterning, [12][13][14][15][16][17] trapping, [18][19][20][21] focusing, 22,23 concentrating, [24][25][26] and guiding [27][28][29] of particles and analytes, which are crucial functions for biomedical applications. To achieve such results, it is often required to enhance and confine the acoustic field near the analytes, which, at this scale, is a challenging endeavor.…”

Section: Ultrasonicmentioning

confidence: 99%

Microfabricated acoustofluidic membrane acoustic waveguide actuator for highly localized in-droplet dynamic particle manipulation

et al. 2023

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“…It hence gives rise to an unavoidable gap between research and application, where transparent tubes are always of high priority for lab studies on fluid mechanics, heat, and mass transfer under spatial limitation while metal tubes of opaque feature are widely employed in practical scenarios. [ 5f,5g,16 ]…”

Section: Introductionmentioning

confidence: 99%

How to Compute the Contact Angle inside an Opaque Capillary Tube: A Universal Equation

Zhao

Sun

2022

Advcd Theory and Sims

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Capillarity is a ubiquitous and important phenomenon in nature. The Jurin's law establishes a relationship between the contact angle and the liquid rising height inside a capillary tube and is widely employed to evaluate the wettability of transparent tubes since 1717. However, it fails once encounters the opaque counterparts because of the invisible rising height. Here, an idea that correlates the contact angle with an intrinsic property of a matter, i.e., the mass is proposed. A universal equation is thus established to compute the contact angle using the liquid mass inside the capillary tube. The equation is systematically verified against the height measurement method adopting a series of quartz capillary tubes, where a good agreement is attained. An in situ approach of high sensitivity is hence derived and demonstrated to evaluate the capillary tubes regardless of the wettability, transparency, or materials. A theoretical basis is provided to assess the surface wettability inside capillary tubes in a more general way and thus a new avenue is opened to investigate the heat and mass transfer under spatial limitation with well‐defined surfaces for portable devices, flexible electronics, etc.

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Motion of Long Levitating Drops in Tubes in an Anti-Bretherton Configuration

Cited by 5 publications

References 41 publications

Microfluidics at Fiber Tip for Nanoliter Delivery and Sampling

Microfluidics at Fiber Tip for Nanoliter Delivery and Sampling

Microfabricated acoustofluidic membrane acoustic waveguide actuator for highly localized in-droplet dynamic particle manipulation

How to Compute the Contact Angle inside an Opaque Capillary Tube: A Universal Equation

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