Self-Stimulated Capillary Jet
|Author||González García, Heliodoro
García García, Francisco Javier
Castrejón-Pita, José Rafael
Castrejón-Pita, Alfonso A.
|Department||Universidad de Sevilla. Departamento de Física Aplicada III
Universidad de Sevilla. Departamento de Física Aplicada I
|Abstract||Inspired by Savart’s pioneering work, we study the self-stimulated dynamics of a capillary jet. The
feedback loop is realized by extracting surface perturbations from a section of the jet itself via a laserphotodiode pair, ...
Inspired by Savart’s pioneering work, we study the self-stimulated dynamics of a capillary jet. The feedback loop is realized by extracting surface perturbations from a section of the jet itself via a laserphotodiode pair, whose amplified signal drives an electromechanical actuator that, in turn, produces pressure perturbations at the exit chamber. Under specific conditions, this loop establishes phase-locked stimulation regimes that overcome the otherwise random natural breakup. For each laser position along the jet, the gain of the amplifier acts as a selector across a discrete set of observable frequencies. The main observed features are explained by a linear theory that combines the transfer function of each stage in the loop. Our findings are relevant to continuous inkjet technologies for the production of equally sized droplets.
|Citation||González García, H., Arcenegui, J., García García, F.J., Castrejón-Pita, J.R. y Castrejón-Pita, A.A. (2021). Self-Stimulated Capillary Jet. Physical Review Applied, 15 (1), 014054-.|