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Rotating disk electrode
Posted 02.10.2017, 07:09 GMT-4 Chemical, Computational Fluid Dynamics (CFD), Electrochemistry Version 5.3 0 Replies
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Hi
Some improvement has taken place in my simulations of a RDE (attached). The problems are that ca. 150 rpm is the highest rotation speed that a simulation converges with, and the limiting current does not follow the square root dependence of the angular velocity: the exponent is more like 0.825.
My exact question is that should I have No Flux condition on all boundaries, except the electrode surface, of course? On the first hand, using that the simulation does not converge and, on the other hand, there must be a bulk concentration BC in order not to loose material from the simulation domain; that would correspond to bulk electrolysis.
Simulations to a channel flow electrode or a wall-jet electrode neither give the proper flow rate dependence of the limiting current.
Can someone comment?
Lasse
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Hello Lasse Murtomäki
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