NDLI: All-angle removal of CO2 bubbles from the anode microchannels of a micro fuel cell by lattice-Boltzmann simulation

Content Provider	Springer Nature Link
Author	Fei, K. Hong, C. W.
Copyright Year	2006
Abstract	The removal of carbon dioxide (CO2) at the anode of a micro direct methanol fuel cell (μDMFC) is critical. The bubbles are generated at the anode and may block part of the catalyst/diffusion layer, causing the μDMFC to malfunction. This work discusses the CO2 bubble dynamics of microfluidics in a μDMFC from a microscopic perspective. A two-dimensional, nine-velocity lattice-Boltzmann model was adopted in this work to simulate the two- component (CO2 bubble plus methanol solution) two-phase (gaseous and liquid) micro flow in a microchannel. The liquid–gas surface tension, the buoyancy force and the fluid–solid wall interaction force play the major roles in the bubble dynamics. They are treated as source terms in the lattice momentum equation. Simulation results indicate that the methanol stream flow rate, the pore size and the channel incline angle significantly affect the removal of CO2 bubbles. The effect of the incline angle is substantial at low stream flow rates. The critical pore size in the microchannel for removing bubbles at all angles under various flow conditions has been predicted quantitatively.
Starting Page	77
Ending Page	88
Page Count	12
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	3
Issue Number	1
e-ISSN	16134990
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-07-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lattice-Boltzmann model Microchannel Bubble dynamics Engineering Thermodynamics, Transport Phenomena Mechanics, Fluids, Thermodynamics Nanotechnology Polymer Sciences Medical Microbiology Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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