The influences of physicochemical parameters on chemohydrodynamic oscillations, driven by surface tension variations

due to a bimolecular reaction, are examined numerically. By considering mass, momentum, and chemical species balances

across the air–solution interface, we derived interface conditions and incorporated them into the conventional momentum

equation, i.e., the Navier–Stokes equation. By considering the reaction rate, the initial reactant ratio, the reactor size, and

Marangoni numbers of the reactants and product, we derived some dimensionless physiochemical parameters, and analyzed

their effects on the temporal oscillation of the reaction system. Even though the surface tension gradient due to a faster

chemical reaction promotes the damped oscillation, the chemical reaction rate plays little role in the onset of oscillation and

its period for the fast reaction system. Furthermore, during the initial reaction period, the temporal oscillation of the reaction

system is influenced by the physical parameters, i.e., the Marangoni numbers and the initial reactants ratio. However, the

effects of these physical parameters become weaker as the reaction progresses.