Experimental and numerical study of droplets hydrodynamics in microchannels

Sarrazin, Flavie; Loubière, Karine; Prat, Laurent E.; Gourdon, Christophe; Bonometti, Thomas; Magnaudet, Jacques

doi:10.1002/aic.11033

Cited by 116 publications

(90 citation statements)

References 22 publications

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“…It appears that in every case there is a major mixing zone in the center of the droplet and two smaller zones, in the front and at the back of the droplet where the fluid is trapped. This has been observed both experimentally and numerically [10,37], by using passive tracers or dye inside the droplets. Figure 12 is a snapshot of a movie of physical experiment [10] of evolving microdroplets with passive tracers inside.…”

Section: Microfluidic Applicationsmentioning

confidence: 88%

On stability condition for bifluid flows with surface tension: Application to microfluidics

Galusinski

Vigneaux

2008

Journal of Computational Physics

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Models for incompressible immiscible bifluid flows with surface tension are here considered. Since Brackbill, Kothe and Zemach (J. Comput. Phys. 100, pp 335-354, 1992) introduced the Continuum Surface Force (CSF) method, many methods involved in interface tracking or capturing are based on this reference work. Particularly, the surface tension term is discretized explicitly and therefore, a stability condition is induced on the computational time step. This constraint on the time step allows the containment of the amplification of capillary waves along the interface and puts more emphasis on the terms linked with the density in the Navier-Stokes equation (i. e. unsteady and inertia terms) rather than on the viscous terms. Indeed, the viscosity does not appear, as a parameter, in this stability condition.We propose a new stability condition which takes into account all fluid characteristics (density and viscosity) and for which we present a theoretical estimation. We detail the analysis which is based on a perturbation study -with capillary wave -for which we use energy estimate on the induced perturbed velocity. We validate our analysis and algorithms with numerical simulations of microfluidic flows using a Level Set method, namely the exploration of different mixing dynamics inside microdroplets.

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Section: Microfluidic Applicationsmentioning

confidence: 88%

On stability condition for bifluid flows with surface tension: Application to microfluidics

Galusinski

Vigneaux

2008

Journal of Computational Physics

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“…the stoechiokinetics parameters, the phase equilibria data (for instance solubility) or the reaction enthalpies can be efficiently determined thanks to microfluidic devices. Some examples of microfluidic tool use are now available either in literature (Sarrazin et al, 2006(Sarrazin et al, , 2007Pradère et al, 2006Pradère et al, , 2010Abgrall and Gué, 2007 Benchmark study. Case of a liquid-liquid transfer limited reaction.…”

Section: Equipment Qualificationmentioning

confidence: 99%

What are the needs for Process Intensification?

Gourdon

Elgue

Prat

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°2, et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 3, Copyright © 2015, IFP Energies nouvelles > Editorial -Towards the Laboratory of the Future for the Factory of the FutureÉditorial -Vers le laboratoire du futur pour construire l'usine du futur Particularly, batch-to-continuous is one of the key issues for intensifying processes. But, the need of process intensification requires the need of collecting many new data of high quality relative to the chemical reaction and to the equipment as well, which represents sometimes a huge effort. This discussion is the opportunity to review the basic data and the metrology associated for the characterization of applications and technologies in order to guide the design of the intensified process. Concerning the chemicals, the stoechio-kinetics parameters, the phase equilibria data (for instance solubility) or the reaction enthalpies can be efficiently determined thanks to microfluidic devices. Concerning the equipment, benchmark studies have to be performed in view of comparing the technologies according to pressure drop, residence time distribution, heat and mass transfer performances, mixing efficiencies and so on. A way of capitalizing the background knowledge lies on simulation tools development, here called data processing tool. This presentation intends also to introduce some of the European network tools developed for diffusing the methodology of intensification, like the industrial club EUROPIC (European Process Intensification Centre) and the demonstration platform MEPI (Maison Européenne des Procédés Innovants).Résumé -Quels besoins pour intensifier un procédé ? -L'intensification des procédés est un concept désormais bien répandu au sein de la communauté du génie des procédés. Le développement de nouvelles voies chimiques et de technologies novatrices peut parfois conduire à des innovations de rupture. Il en a résulté un certain nombre de réussites industrielles. En particulier le passage batchcontinu est une des voies privilégiées pour intensifier un procédé. Mais si l'intérêt de l'intensification n'est plus à démontrer, il n'en demeure pas moins qu'elle nécessite d'acquérir un grand nombre de données relatives aussi bien à la voie chimique qu'au type d'équipement envisagé, ce qui représente un effort considérable. Cet article fait le point sur les données de base à acquérir et la métrologie associée pour concevoir un procédé intensifié. En ce qui concerne l'application chimique, on peut alors avoir recours aux outils microfluidiques pour acquérir de manière fiable et rapide les informations stoechiocinétiques et enthalpiques. En ce qui concerne l'équipement, des méthodes standards permettent de comparer les performances de diverses technologies en matière de perte de charge, distribution de temps de séjour, transferts de matière et de chaleur, mélange, etc. Une manière efficace de capitaliser la c...

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“…This method provides directly visualized information about the acoustic pressure wave travelling inside the channel [5].Another typical method is using analytical modeling method with a higher simulation speed. This method can describe the ink channel dynamics, although the accuracy of analytical models is lower than numerical models.…”

Section: Introductionmentioning

confidence: 99%

Model-based Adjustment of Droplet Characteristic for 3D Electronic Printing

Lin¹,

Jing

Chen

et al. 2017

MATEC Web Conf.

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Abstract. The major challenge in 3D electronic printing is the print resolution and accuracy. In this paper, a typical mode -lumped element modeling method (LEM) -is adopted to simulate the droplet jetting characteristic. This modeling method can quickly get the droplet velocity and volume with a high accuracy.Experimental results show that LEM has a simpler structure with the sufficient simulation and prediction accuracy.

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Experimental and numerical study of droplets hydrodynamics in microchannels

Cited by 116 publications

References 22 publications

On stability condition for bifluid flows with surface tension: Application to microfluidics

On stability condition for bifluid flows with surface tension: Application to microfluidics

What are the needs for Process Intensification?

Model-based Adjustment of Droplet Characteristic for 3D Electronic Printing

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