Multi-phase micro-scale flow simulation in the electrodes of a PEM fuel cell by lattice Boltzmann method

Park, J.; Li, X.

doi:10.1016/j.jpowsour.2007.12.008

Cited by 104 publications

(44 citation statements)

References 33 publications

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“…As such, Figure 13 compares the through-plane permeability as a function of compression as predicted from the LB simulations against the calculated value based on Eqs. (15) and (16). The results demonstrate good agreement between the two sets of results.…”

Section: Porositysupporting

confidence: 61%

A Numerical Study of Structural Change and Anisotropic Permeability in Compressed Carbon Cloth Polymer Electrolyte Fuel Cell Gas Diffusion Layers

et al. 2010

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The effect of compression on the actual structure and transport properties of the carbon cloth gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC) are studied here. Structural features of GDL samples compressed in the 0.0–100.0 MPa range are encapsulated using polydimethylsiloxane (PDMS) and by employing X‐ray micro‐tomography to reconstruct direct digital 3D models. Pore size distribution (PSD) and porosity data are acquired directly from these models while permeability, degree of anisotropy and tortuosity are determined through lattice Boltzmann (LB) numerical modelling. The structural models reveal that structural change proceeds through a three‐step process, while PSD data suggests a characteristic peak in the pore diameter of 10–14 μm and a decrease in the mean pore diameter from 33 to 12 μm over the range of tested pressures. A mathematical relationship between compression pressure and permeability is determined based on the Kozeny–Carman equation, revealing a one order of magnitude reduction in through‐plane permeability for a two order of magnitude increase in pressure. The results also reveal that the degree of anisotropy peaks in the range of 0.3–10.0 MPa, suggesting that in‐plane permeability can be maximised relative to through‐plane permeability within a material‐specific range of compression pressures.

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Section: Porositysupporting

confidence: 61%

A Numerical Study of Structural Change and Anisotropic Permeability in Compressed Carbon Cloth Polymer Electrolyte Fuel Cell Gas Diffusion Layers

et al. 2010

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“…applied the LB model with a microfocal X-ray CT image of carbon paper to simulate the relative permeability of the liquid and gas phases and compared the measured capillary pressure with calculated data for a pore water saturation of 0.1, with both sets of results exhibiting general agreement [7]. A similar study presented by Park and Li simulated orthogonal permeability and unsteady droplet movement through a 2D image of a carbon paper GDL [8]. Hao and Cheng simulated the dynamic behaviour of water droplet formation and removal in the gas channel of a PEFC [9].…”

Section: Introductionmentioning

confidence: 94%

Simulation of liquid water breakthrough in a nanotomography reconstruction of a carbon paper gas‐diffusion layer

et al. 2011

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“…Kumbur et al [20] employed an ex situ flow channel apparatus in order to study droplet formation and instability. Park et al [21] modelled fluid flow through GDLs where it was concluded that a thin GDL with small porosity results in good electrical conductivity; however efficient mass transport requires large pores. Many authors including, Yang et al.…”

mentioning

confidence: 99%

Water droplet accumulation and motion in PEM (Proton Exchange Membrane) fuel cell mini-channels

Carton

Lawlor

Olabi

et al. 2012

Energy

237

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Effective water management is one of the key strategies for improving low temperature Proton Exchange Membrane (PEM) fuel cell performance and durability. Phenomena such as membrane dehydration, catalyst layer flooding, mass transport and fluid flow regimes can be affected by the interaction, distribution and movement of water in flow plate channels.In this paper a literature review is completed in relation to PEM fuel cell water flooding. It is clear that droplet formation, movement and interaction with the Gas Diffusion Layer (GDL) have been studied extensively. However slug formation and droplet accumulation in the flow channels has not been analysed in detail. In this study, a Computational Fluid Dynamic (CFD) model and Volume of Fluid (VOF) method is used to simulate water droplet movement and slug formation in PEM fuel cell mini-channels. In addition, water slug visualisation is recorded in ex situ PEM fuel cell mini-channels.Observation and simulation results are discussed with relation to slug formation and the implications to PEM fuel cell performance.

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Multi-phase micro-scale flow simulation in the electrodes of a PEM fuel cell by lattice Boltzmann method

Cited by 104 publications

References 33 publications

A Numerical Study of Structural Change and Anisotropic Permeability in Compressed Carbon Cloth Polymer Electrolyte Fuel Cell Gas Diffusion Layers

A Numerical Study of Structural Change and Anisotropic Permeability in Compressed Carbon Cloth Polymer Electrolyte Fuel Cell Gas Diffusion Layers

Simulation of liquid water breakthrough in a nanotomography reconstruction of a carbon paper gas‐diffusion layer

Water droplet accumulation and motion in PEM (Proton Exchange Membrane) fuel cell mini-channels

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