Piezoelectric atomization of liquids with dynamic viscosities up to 175 cP at room temperature

Cavitation is the determining mechanism for the atomization of high-viscosity liquid

“…The longitudinal and bending forces on the particle of the inner wall of the flow tube can be defined as follows 52 : where is the longitudinal force, is the bending force, is the excitation frequency, is the mass of the particle, is the amplitude of excitation force, is the tilt angle of the excitation force, is the phase of the longitudinal vibration, is the phase of the bending vibration, is the longitudinal vibration mode at the horizontal coordinate point , is the bending vibration mode at the horizontal coordinate point , is the action point of the excitation force in the horizontal coordinate, is the ratio of longitudinal vibration excitation frequency to natural frequency, is the ratio of longitudinal vibration excitation frequency to natural frequency bending vibration, is the modal stiffness of longitudinal vibration, is the relative damping coefficient of longitudinal vibration, and is the relative damping coefficient of bending vibration.…”

“…Therefore, for the cavitation effect inside the liquid, the internal molecular interaction forces are higher when the liquid viscosity is higher, and therefore, the cavitation threshold is higher. In the current study, an empirical equation was used to characterize the relationship between the liquid viscosity and the cavitation threshold: 52 …”

“… 51 our team has proposed a two-dimensional vibration-coupled structure to supply high energy input to the liquid. 52 This study discusses the existing ultrasonic atomization mechanism to explore the atomization mechanism of the abovementioned atomizer.…”