Semianalytical modeling of the mass transfer in microfluidic electrochemical chips
Article dans une revue avec comité de lecture
Date
2021Journal
Physical Review EAbstract
This paper reports a mass transfer model of a reactant flowing in a large aspect ratio microfluidic chip made of a channel with electrodes on the side walls. A semi-analytical solution to the two dimensional Fickian diffusion of a reactant in a microchannel, including the electrochemical reactionat the electrode interface, and the velocity profile obtained from the Navier-Stokes equations in a fully developed laminar regime is found . The solution is written in the Laplace domain in terms of transfer functions. The proposed solution is an extension of the Lévêque approximation describing the reactant diffusion from the electrode to the middle of the microfluidic channel. The main applications of this work are the use of the obtained transfer functions for the measurement of the Faradic current density or the chemical concentration at the electrode interface. The study can also be extended to the heat transfer in microfluidic electrochemical chips (temperature or heat flux measurements at the electrode interface)
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureIn this work, we report the existence of a stoichiometric regime where the performances of operating polymer electrolyte membrane (PEM) fuel cells are entirely governed by the mass transport in the cathode channels. An ...
-
Article dans une revue avec comité de lectureBATTAGLIA, Jean-Luc; RUFFIO, Emmanuel; KUSIAK, Andrzej; PRADERE, Christophe; ABISSET CHAVANNE, Emmanuelle; CHEVALIER, Stéphane; SOMMIER, Alain; BATSALE, Jean-Christophe (Elsevier BV, 2020)The front face photothermal radiometry technique has been improved in order to estimate the thermal conductivity of thin films with better accuracy compared to existing techniques. The experimental pro- cedure is based on ...
-
Article dans une revue avec comité de lectureIn this work, a novel image-based method is presented to characterize the heat and mass transfer rates in a Hele- Shaw microfluidic reactor. A Fourier transform infrared (FTIR) spectrometer is used in transmission mode in ...
-
Article dans une revue avec comité de lectureThe work presented in this paper reports a versatile and customizable watershed-based pore network extraction tool. It was used to build pore networks from microscale computed tomography images of highly porous carbon-fiber ...
-
Article dans une revue avec comité de lectureDIAB, Yasser; AUGER, Francois; SCHAEFFER, Emmanuel; ALLAHHAM, Adib; CHEVALIER, Stéphane (MDPI AG, 2022-03-23)Proton Exchange Membrane Fuel Cells (PEMFCs) are clean energy conversion devices that are widely used in various energy applications. In most applications, the main challenge is accurately estimating the state of health ...