On the forced convective heat transport in a droplet-laden flow in microchannels

Urbant, Polina; Leshansky, Alexander; Halupovich, Yulia

doi:10.1007/s10404-007-0211-2

Cited by 50 publications

(32 citation statements)

References 26 publications

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“…Various interface tracking/capturing techniques have been employed to simulate the heat transfer in droplets, slugs, and plugs, such as the volume of fluid method [19], the level set method [20,21], and the phase field method [22]. Regarding the geometries of microchannels, most simulations were performed with cylindrical microcapillaries [18,20,22,21,23,19] or two dimensional (2D) microchannels [8], where the three dimensional (3D) effect on the flow and on the heat transfer process cannot be considered. However, in most microchannel heat exchangers, the microchannels usually have rectangular or other non-circular cross sections [14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Three dimensional features of convective heat transfer in droplet-based microchannel heat sinks

Che

Wong

Nguyen

et al. 2015

International Journal of Heat and Mass Transfer

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Convective heat transfer in droplet-based microchannel heat sinks can be enhanced by the recirculating vortices due to the presence of interfaces. In rectangular microchannels, the three dimensional structures of the vortices and the 'gutters' (i.e., the space between the curved droplet interface and the corner of the microchannel) can significantly affect the heat transfer process. Numerical simulations of the heat transfer process are performed to study the three dimensional features in droplet-based microchannel heat sinks. The finite volume method and the level set method are employed to simulate the flow dynamics, the evolution of the interface, and the heat transfer. The results show that the 'gutters' can hinder the heat transfer process because of its parallel flow, whereas the recirculating flow in droplets and in slug regions between successive droplets can enhance the heat transfer by advecting hot fluid towards the center of the droplets/slugs and advecting fresh fluid towards the wall of the channel. The effects of the length of droplets, the aspect ratio of the channel cross sections, and the Peclet number are analyzed.

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Section: Introductionmentioning

confidence: 99%

Three dimensional features of convective heat transfer in droplet-based microchannel heat sinks

Che

Wong

Nguyen

et al. 2015

International Journal of Heat and Mass Transfer

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“…From the various applications that will be discussed in the second part of this review, FLUENT is used in (Hardt 2005;Taha and Cui 2006a, b;Tanthapanichakoon et al 2006;Abdallah et al 2006;Hardt and Wondra 2008;Ö zkan et al 2007;Zhu et al 2008;Liu and Wang 2008;Urbant et al 2008;Alke and Bothe 2009;Gupta et al 2009bGupta et al , 2010Santos and Kawaji 2010), CFX in (Schönfeld and Rensink 2003;Ndinisa et al 2005;Ö zkan et al 2007;Shao et al 2008;Shepel and Smith 2009;Xiong and Chung 2010), STAR-CD in (Ö zkan et al 2007;Wegener et al 2009), CFD-ACE? in (Kobayashi et al 2004;Rosengarten et al 2006;Saha and Mitra 2009b;Lai et al 2010), TransAT in (Naraynan and Lakehal 2006;Lakehal et al 2008;Narayanan and Lakehal 2008;Chatzikyriakou et al 2009;Gupta et al 2010), COMSOL in (Zagnoni et al 2010;Constantinou and Gavriilidis 2010;Chasanis et al 2010;Kenig et al 2011) and OpenFOAM in (Saha and Mitra 2009a;Kunkelmann and Stephan 2009).…”

Section: Computer Codesmentioning

confidence: 99%

Numerical modeling of multiphase flows in microfluidics and micro process engineering: a review of methods and applications

Wörner

2012

Microfluid Nanofluid

372

197

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This article presents a comprehensive review of numerical methods and models for interface resolving simulations of multiphase flows in microfluidics and micro process engineering. The focus of the paper is on continuum methods where it covers the three common approaches in the sharp interface limit, namely the volumeof-fluid method with interface reconstruction, the level set method and the front tracking method, as well as methods with finite interface thickness such as color-function based methods and the phase-field method. Variants of the mesoscopic lattice Boltzmann method for two-fluid flows are also discussed, as well as various hybrid approaches. The mathematical foundation of each method is given and its specific advantages and limitations are highlighted. For continuum methods, the coupling of the interface evolution equation with the single-field Navier-Stokes equations and related issues are discussed. Methods and models for surface tension forces, contact lines, heat and mass transfer and phase change are presented. In the second part of this article applications of the methods in microfluidics and micro process engineering are reviewed, including flow hydrodynamics (separated and segmented flow, bubble and drop formation, breakup and coalescence), heat and mass transfer (with and without chemical reactions), mixing and dispersion, Marangoni flows and surfactants, and boiling.

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“…In this case, homogenous mixing can be achieved faster by implementing chaotic advection, [24] as well as by establishing hydrodynamic recirculation inside the droplet. [25] Some numerical studies concerning the thermal effects of heat transport in a droplet-laden flow [26] have also been studied. Moreover, many experimental and theoretical works concerning the thermal effects and thermal characterisation of segmented liquid gas flows have been presented.…”

Section: Introductionmentioning

confidence: 99%

Quantitative thermal analysis of heat transfer in liquid–liquid biphasic millifluidic droplet flows

Romano

Pradère

Toutain

et al. 2014

Quantitative InfraRed Thermography Journal

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. In this paper, infrared thermography is used to propose a simple quantitative approach toward understanding the thermal behaviour of a liquid-liquid biphasic millifluidic droplet flow under isoperibolic conditions. It is shown that due to the isoperibolic boundary condition, the thermal behaviour at the established periodic state can be managed according to different orders, i.e. either a continuous or fluctuating contribution. A complete analytical solution is proposed for the complex problem model, then a simplified model is proposed. Finally, a simple homogeneous equivalent thin body model approximation with a characteristic coefficient function of a biphasic flow mixing law is sufficient for describing the thermal behaviour of the media under isoperibolic conditions. From this theoretical validation, the experimental results concerning the behaviour of a biphasic oil and droplet flow are presented. An analytical representation law is proposed to quantitatively estimate and predict the thermal behaviour of the flow. Moreover, it is demonstrated that with this new method, the thermophysical properties of the phase can be estimated with a deviation less than 5% from that reported by the suppliers.

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On the forced convective heat transport in a droplet-laden flow in microchannels

Cited by 50 publications

References 26 publications

Three dimensional features of convective heat transfer in droplet-based microchannel heat sinks

Three dimensional features of convective heat transfer in droplet-based microchannel heat sinks

Numerical modeling of multiphase flows in microfluidics and micro process engineering: a review of methods and applications

Quantitative thermal analysis of heat transfer in liquid–liquid biphasic millifluidic droplet flows

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