Contribution of an Electro-Vortex Flow to Primary, Secondary, and Tertiary Electric Current Distribution in an Electrolyte
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU136972" target="_blank" >RIV/00216305:26210/18:PU136972 - isvavai.cz</a>
Result on the web
<a href="http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=14&SID=D1mYtjVweLYpwOM65oz&page=1&doc=1" target="_blank" >http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=14&SID=D1mYtjVweLYpwOM65oz&page=1&doc=1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1149/2.1201811jes" target="_blank" >10.1149/2.1201811jes</a>
Alternative languages
Result language
angličtina
Original language name
Contribution of an Electro-Vortex Flow to Primary, Secondary, and Tertiary Electric Current Distribution in an Electrolyte
Original language description
Three different approaches, known as primary, secondary, and tertiary current distributions, are employed to calculate the electric current distribution throughout an electrochemical system. Ohm's law is used for the primary and secondary, whereas Nernst-Planck equations for the tertiary. The electromagnetic field is calculated in the entire system (CaF2-based electrolyte, air, electrode, and graphite crucible), while the electro-vortex flow and concentration fields of ions are solved only in the electrolyte. The model accounts for the faradaic reaction of the formation of Fe2+ at the anode and the discharge of Fe2+ and Ca2+ at the cathodic crucible. The electric double layer (EDL) is modeled considering the generalized Frumkin-Butler-Volmer (gFBV) formula. The dissimilarity in the calculated concentration of Fe2+ between secondary and tertiary current distributions decreases with the increase of the applied voltage. A strong stirring of the electrolyte by (exclusive) Lorentz force cannot guarantee uniform concentration for all ions. As the applied voltage increases the migration may locally surpass the advection flux, leading to accumulation of ions near the anode/cathode. All current distributions (primary, secondary and tertiary) predict equal bulk electrical resistance in the absence of diffusive electric current, equal diffusion coefficients for all ions, despite the non-uniform distribution of electrical conductivity in the tertiary current distribution. The modeling results enabled us to elucidate the origin of an experimentally observed phenomenon, i.e., the formation of a thick layer of FeO under the tip of electrode. (C) 2018 The Electrochemical Society.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN
0013-4651
e-ISSN
1945-7111
Volume of the periodical
165
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
„E604“-„E615“
UT code for WoS article
000444098600002
EID of the result in the Scopus database
2-s2.0-85059958689