Flow distribution and pressure drop in parallel-channel configurations of planar fuel cells

Maharudrayya, S.; Jayanti, S.; Deshpande, Abhijit P.

doi:10.1016/j.jpowsour.2004.12.018

Cited by 150 publications

(56 citation statements)

References 18 publications

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“…5, a further increase of the inlet flow rate to 390 mL/min (Re = 45) causes an increasing non-uniformity of the flow distribution. Delsman et al [22] and Maharudrayya et al [15] observed similar features for the relationship between inlet flow rate and velocity distribution in the channels, i.e., a transitional velocity existed, below which the flow distribution over the plate was independent of velocity.…”

Section: Comparison Between 2d and 3d Simulationsmentioning

confidence: 76%

“…Their analysis indicated that a single characteristic parameter containing the number of channels and appropriate velocities and cross-sectional areas ratios was sufficient to determine flow behaviour. Maharudrayya et al [15] extended the model to laminar flow, and validated it against full three-dimensional CFD calculations. It was demonstrated that in Z-type configuration, as Re increases the flow becomes non-uniform.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Microchannel Plate Design on Fluid Flow Uniformity at Low Flow Rates

Griffini

Gavriilidis

2007

Chem Eng & Technol

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In order to increase productivity of microfluidic contactors, a large number of units operating in parallel is required. For operations involving heat transfer, mass transfer and reactions, fluid velocity and residence time in the microchannels play a crucial role in system performance. Therefore it is important to design microstructures able to guarantee satisfactory flow equipartition within the microchannels. In this work, flow distribution in microstructured plates of varying geometries was investigated. CFD calculations showed that two-dimensional simulations can be misleading in assessing flow maldistribution. Three-dimensional models revealed the presence of a critical value of Reynolds number at which a transition occurs from a flow regime fully determined by viscous forces (where fluid distribution is independent of flow rate) to a regime where inertial effects start to affect fluid distribution. It was found that flow distribution improves by including fins in the plate to guide the flow, increasing the length of the fins and decreasing the plate width. Increasing the length of flow distribution chambers also improves flow uniformity but a limit is reached for the geometries considered, beyond which no further improvement is obtained. Furthermore, modification of the flow distribution chambers and positioning of the inlet and outlet in line with the microchannels can improve flow uniformity.

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Section: Comparison Between 2d and 3d Simulationsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Effect of Microchannel Plate Design on Fluid Flow Uniformity at Low Flow Rates

Griffini

Gavriilidis

2007

Chem Eng & Technol

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“…when the number of channels and their concentration becomes large (Maharudrayya et al, 2005, for example). One can show that the two approaches are coherent, but it is not just a trivial matter of letting N become large in our models.…”

Section: Resultsmentioning

confidence: 99%

“…In direct link with the present work, let us mention the recent investigation of square meshed circuits or square lattices (Tondeur et al, 2011) and of different varieties of ladder-type circuits, including multi-scale constructal-type structures (Chen et al, 2007;Wang, 2008Wang, , 2010Saber et al, 2009Saber et al, , 2010. In his work focused on fuel cells, Wang developed a continuous theoretical model based on mass and momentum conservation to predict the flow distribution and pressure drop in such circuits, taking both friction and inertial effects into account, and for both U and Z circuits Earlier studies along the same line neglect either the inertial effects (for example, Kee et al, 2002;Maharudrayya et al, 2005 for fuel cells) or the friction effects (for example Bassiouny and Martin, 1984a, b for heat exchangers).…”

Section: Z-type and U-type Linear Fluidic Ladder Circuitsmentioning

confidence: 99%

Flow and pressure distribution in linear discrete “ladder-type” fluidic circuits: An analytical approach

Tondeur

Fan

Commenge

et al. 2011

Chemical Engineering Science

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“…Some adjustments of the structure parameters of the manifold should be taken to increase the heat passing through the holes lying at the back-end of manifold, in order to balance the uneven heat flow distribution during the preheating process [27][28][29]. According to the relationship of mass flow and heat flow, if more heat passes through the holes which lie at the back-end of the manifold, more mass flow rate should transport through these.…”

Section: The Distribution Of Heat Passing Through the Holesmentioning

confidence: 99%

Numerical Study on Heat Distribution and Transfer Characteristics of a Manifold in a Coal Mine VAM TFRR Oxidation Bed

Li¹,

Liu²,

Han³

et al. 2015

TOMEJ

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A thermal flow-reversal reactor is candidate for utilizing low concentration ventilation air methane. In this paper, a numerical study is performed by using the FLUENT software to explore the details of the transient preheating and starting process of the thermal flow-reversal reactor oxidation bed. The bed was heated by hot gas, which was transported and distributed through the holes of manifolds to the middle of the bed. The homogeneous porous media and coupled heat transfer models were chosen; and the mass and heat flow distributions passing through the holes, the heat transfer on the outer surface of the manifold and the temperature distribution of the bed were calculated. The results indicate that the heat of the hot gas passing through the holes decreases gradually along the direction of the hot gas flowing in the manifold, causing the temperature of the bed decrease accordingly. The calculated temperatures of the oxidation bed are compared with the tested results. The maximum error between the calculation and the test was 8.9%.

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Flow distribution and pressure drop in parallel-channel configurations of planar fuel cells

Cited by 150 publications

References 18 publications

Effect of Microchannel Plate Design on Fluid Flow Uniformity at Low Flow Rates

Effect of Microchannel Plate Design on Fluid Flow Uniformity at Low Flow Rates

Flow and pressure distribution in linear discrete “ladder-type” fluidic circuits: An analytical approach

Numerical Study on Heat Distribution and Transfer Characteristics of a Manifold in a Coal Mine VAM TFRR Oxidation Bed

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