Characterization of the hydrodynamics inside a practical cell with a rotating disk electrode

Hydrodynamic Analysis of Electrochemical Cells

“…This result was reproduced numerically through threedimensional numerical simulations (Serre & Bontoux, 2007). The effect of the liquid phase free surface on the flow pattern inside the electrochemical cell with a RDE has been studied recently by Real, et al (Real, et al, 2008), Real-Ramirez, et al (Real-Ramirez, et al, 2010) and Gonzalez, et al (Gonzalez, et al, 2011). These works conducted several three-dimensional unsteady-state numerical simulations using biphasic systems.…”

“…8. Example of the biphasic three-dimensional models employed by Gonzalez, et al (Gonzalez, Real, Hoyos, Miranda, & Cervantes, 2011), Real-Ramirez, et al (Real-Ramirez, Miranda-Tello, Hoyos-Reyes, & Gonzalez-Trejo, 2010) and Real, et al (Real, et al, 2008).…”

“…By analyzing the results of several physical and numerical simulations at different electrode rotation speeds and several cell sizes, those works found that there exist a synergetic effect of the cell internal walls, the submerged electrode side wall and the liquid free surface (Real-Ramirez, et al, 2010). Their numerical simulations showed that the asymmetry of the electrochemical cell flow pattern is intensified by the free surface asymmetry, which depends directly on the electrode rotation speed and the electrode submergence depth (Gonzalez, et al, 2011). Several fluid stream lines below the electrode for two distinct values of the distance between the electrode active face and the cell bottom wall are shown in Figures 11 and 12.…”

“…Based on the results of their numerical simulations and following the functional form of the solutions proposed by Ackroyd (Ackroyd, 1978) and Ariel (Ariel, 1996), Gonzalez, et al (Gonzalez, et al, 2011) argued that the fluid velocity component orthogonal to the electrode active face decreases almost exponentially with the square root of the electrode rotation speed. Gonzalez, et al (Gonzalez, et al, 2011) proposed an empirical correction to the Levich equation as follows: Gonzalez, et al evaluated the validity of Equation (21) using the experimental results reported by Unguresan & Gligor (Unguresan & Gligor, 2009).…”

“…Gonzalez, et al (Gonzalez, et al, 2011) proposed an empirical correction to the Levich equation as follows: Gonzalez, et al evaluated the validity of Equation (21) using the experimental results reported by Unguresan & Gligor (Unguresan & Gligor, 2009). The experiments correspond with the electrocatalytic NADH oxidation process taking place at graphite electrodes modified with a polymer of phenothiazine formaldehyde at various concentrations of NADH and for an electrolyte pH value of 6.0.…”