Impedance of Laminar Free Convection and Thermal Convection at a Vertical Electrode - Sorbonne Université Access content directly
Journal Articles Journal of The Electrochemical Society Year : 1997

Impedance of Laminar Free Convection and Thermal Convection at a Vertical Electrode

Abstract

Simultaneous heat and mass transfer under thermal laminar free convection to a vertical electrode was investigated. On the basis of Marchiano and Arvia's theory developed in steady state, the ac diffusion impedance for a circular or a rectangular vertical electrode was calculated as a function of frequency. For this calculation, the dimensionless local flux was expressed as a series expansion of the dimensionless local characteristic frequency ξ in the low‐frequency range and proportional to in the high‐frequency range. With 80 terms in the series, the two solutions were shown to overlap fairly well for 1.6 ⩽ ξ ⩽ 10. The overall impedance was then obtained for the different electrode geometries. For a circular electrode these theoretical predictions were successfully tested with different steady temperature differences, ΔT, between the electrode and the solution (0° ⩽ ΔT ⩽ 2.65°).
No file

Dates and versions

hal-04370447 , version 1 (03-01-2024)

Identifiers

Cite

Isabelle Citti, Omar Aaboubi, Jean Paul Chopart, Claude Gabrielli, Alain Olivier, et al.. Impedance of Laminar Free Convection and Thermal Convection at a Vertical Electrode. Journal of The Electrochemical Society, 1997, 144 (7), pp.2263-2271. ⟨10.1149/1.1837801⟩. ⟨hal-04370447⟩
7 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More