This article reports a novel strip-type micro-throttle pump with a rectangular actuator geometry, with more efficient chip surface consumption compared to existing micro-pumps with circular actuators. Due to the complex structure and operation of the proposed device, determination of detailed structural parameters is essential. Therefore, we developed an advanced, fully coupled 3D electro-fluid-solid mechanics simulation model in COMSOL that includes fluid inertial effects and a hyper-elastic model for PDMS and no-slip boundary condition in fluid-wall interface. Numerical simulations resulted in accurate virtual prototyping of the proposed device, detailed operation analysis and optimization of crucial geometrical parameters.
COBISS.SI-ID: 9729620
Improvement of bubble tolerance and priming in micropumps based on Triton X-100 surfactant is investigated. Transparent membrane piezoelectric micropumps were fabricated. Precise air volumes were introduced into the micropump chamber to emulate micropump bubble disturbance. Micropump recovery time decreased with increased addition of Triton X-100 surfactant between 50-100 ppm. Effective recovery is mainly a consequence of the air bubble dispersion into a foam of small bubbles. Small bubbles are then readily removed by liquid flow, leading to significant enhancement of micropump bubble tolerance.
COBISS.SI-ID: 9933140
Scope of work encompasses a detailed analysis of the existing prototypes piezoelectric micropumps as well as numerical simulation, analysis, design, optimization, fabrication and characterization of new prototypes, in order to improve performance and pumping reliability.
COBISS.SI-ID: 9982036