THESIS
2017
xii, 48 pages : illustrations (some color) ; 30 cm
Abstract
Microchannels can be found in most of the lab-on-a-chip experiments as these devices
are intended to study the liquids in an isolated and easily controllable space. In these
experiments it is common to manipulate liquids using electrodes and measure their
electrochemical behaviour. The analysis of a lab-on-a-chip setup can be misleading
without understanding the underlying physics. This requires numerical modelling.
In this thesis finite element simulations will be used to investigate the fluid flow as
well as the distribution of the charge carriers and the electric potential field in an
electrochemical microchannel. The model of the channel will be subjected to three
commonly used electrochemical experiments, i.e. cyclic voltammetry, electrochemical
impedance spectroscopy and...[
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Microchannels can be found in most of the lab-on-a-chip experiments as these devices
are intended to study the liquids in an isolated and easily controllable space. In these
experiments it is common to manipulate liquids using electrodes and measure their
electrochemical behaviour. The analysis of a lab-on-a-chip setup can be misleading
without understanding the underlying physics. This requires numerical modelling.
In this thesis finite element simulations will be used to investigate the fluid flow as
well as the distribution of the charge carriers and the electric potential field in an
electrochemical microchannel. The model of the channel will be subjected to three
commonly used electrochemical experiments, i.e. cyclic voltammetry, electrochemical
impedance spectroscopy and electric conductivity relaxation. The simulations will let
us to predict real experiments and to elucidate the effect of the interaction between the
electrochemical and fluid dynamics. This interaction results in recirculation in the
fluid. Such phenomena can change the conductivity thus experiments can lead to
incorrect estimates of various underlying parameters such as the Li diffusion
coefficient and the surface exchange rates if neglected this phenomenon is neglected.
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