Thermal and Hydrodynamic Performances of Chaotic Mini-Channel: Application to the Fuel Cell Cooling

Lasbet, Yahia; Auvity, Bruno; Castelain, Cathy; Peerhossaini, Hassan

doi:10.1080/01457630701328908

Cited by 50 publications

(22 citation statements)

References 14 publications

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“…Such design tested in this study, S-3D geometry, has already showed important thermal performances in heat exchanger PEMFC cooling [17][18][19]. It improved greatly current heat exchanger performances for PEMFC cooling applications.…”

Section: Introductionmentioning

confidence: 95%

“…The destruction of this symmetry is an indication of the destabilization of the flow and it can be a precursor of the transitional regime onset. In the S-2D channel (Figure 8a), the flow is generally regular, and the particles trajectories do not diverge [18]. Thereby, the S-2D geometry is not the appropriate geometry to achieve a perfect mixing.…”

Section: Mixing Efficiencymentioning

confidence: 99%

“…Mixing performances in the considered geometries are assessed using the degree of mixing as defined in previous works [18,21,22] as following:…”

Section: Characterization Of the Mixing And Parietal Heat Exchangementioning

confidence: 99%

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Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Boukhalkhal¹,

Lasbet²,

Makhlouf³

et al. 2017

IJHT

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In this study, we investigate the chaotic behavior of fluid particles in three-dimensional open geometries and their effects on the amelioration of miscible fluids mixing, thermal homogenization and thermal performances by using a computational fluid dynamics (CFD) method. Three geometry configurations (straight channel, serpentine-2D channel and chaotic geometry channel serpentine-3D) are considered. The dispersion phenomena are characterized through the presentation of the Poincaré sections and the mixing quality is quantified by calculating the mixing degree in cross section for several Reynolds numbers ranging from 5 to 200. This study reveals that height capacities in terms of mixing and heat performances are obtained by the chaotic geometry where the level mixing is superior to 0.95 for Reynolds equal to 200. In addition, the heat transfer in the S-3D is highly improved where the mean Nusselt number is 13 times bigger than that calculated in the straight channel.

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Section: Introductionmentioning

confidence: 95%

Section: Mixing Efficiencymentioning

confidence: 99%

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Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Boukhalkhal¹,

Lasbet²,

Makhlouf³

et al. 2017

IJHT

Self Cite

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“…Lasbet et al [14][15] presented the evolution of the trajectory of two particles, which were initially close to each other and injected at the inlet of a C-shaped geometry. The geometry cross section was rectangular with an aspect ratio of 2 and a hydraulic diameter of 1.33mm.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Geometry Scale on the Behaviour of the Local Physical Process of the Velocity Field in the Laminar Flow

Lasbet¹,

Aidaoui²,

Loubar³

2016

IJHT

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It is well known that the convective terms in the equation of fluid motion play an outstanding role on the local proprieties of flows and they affect the local behaviour of physical processes such as deformation, rotation, stretching and folding. Large values of these processes in the flow have pronounced and lasting effects on the improvement of heat transfer and fluid mixing in ducts. The modification of the geometric scale presents an easy and adequate solution to increase these parameters. For this purpose, three dimensional zigzag channels with hydraulic diameters equal to 5 mm, 10 mm and 20 mm were examined in this study. Evolutions of the deformation rate, rotation rate and the stretching/compression coefficients of the vortices were examined for different values of the Reynolds number in three dimensional laminar open flow, using a CFD code. The results illustrate that the geometry with the smallest hydraulic diameter is the more favourable to increase the considered parameters.

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“…Lasbet et al (2007) have numerically studied the flow in a chaotic mini-channel, constructed to pass through special bipolar plates for fuel cell cooling. Senn & Poulikakos (2004) introduced a comparison study between a tree-like net of cooling channels and common serpentine passages based on the fractal network theory.…”

Section: Introductionmentioning

confidence: 99%

Study of a micro-structured PHE for the thermal management of a fuel cell

Stogiannis

Mouza

Paras

2013

Applied Thermal Engineering

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In the constantly growing market of fuel cells, the heat management of the system is a crucial area of research, since it affects the efficiency, operability and lifetime of the fuel cell. The CFD simulations performed for a plate heat exchanger (PHE) with flat plates clearly demonstrate temperature non-uniformity across the membrane of the unit cell. The CFD code was successfully validated with experimental data acquired from a setup that reproduces the geometry and simulates the thermal behaviour of a typical unit PEMFC. Additionally, the performance of a novel PHE, with micro-structured corrugations on its plates, was studied with the previously validated CFD code. The results clearly show that the proposed plate modifications can increase temperature uniformity across the membrane more than 20% compared to that of the flat plate.

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Thermal and Hydrodynamic Performances of Chaotic Mini-Channel: Application to the Fuel Cell Cooling

Abstract: Currently, heat exchangers allowing the thermal management of low-temperature fuel cells (PEMFC)

Cited by 50 publications

References 14 publications

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Numerical study of the chaotic flow in three-dimensional open geometry and its effect on the both fluid mixing and heat performances

Effects of the Geometry Scale on the Behaviour of the Local Physical Process of the Velocity Field in the Laminar Flow

Study of a micro-structured PHE for the thermal management of a fuel cell

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