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This paper presents 3D simulation work for ion-drag micro pump. The commercial simulation software Comsol Multiphysics 4.2 was used to model and simulate ion-drag micro pump for three different configurations of collector electrode. The purpose of the simulation was to investigate the ways to improve the performance of the micro pump and analyze the effect of the electric field, fluid velocity and...
An electrohydrodynamic (EHD) micropump to generate oscillating flow is newly developed and experimentally tested using an arrangement of thin stainless steel wires. A working fluid is accelerated from the charged electrode to the ground electrode by a high electric field. The electric body force responsible for this acceleration is primarily the Coulomb force. In order to increase the electric field...
This paper describes the development of a micro screw pump which can be installed anywhere where pumping is needed in a μ-TAS. We made this micro screw pump to let fluid flow at an extremely low flow rate with high response, and we also created a new method for on-site flow sensing by monitoring the position of the micro screw. The screw we use is made by microstereolithography with magnetically modified...
An electrohydrodynamic (EHD) micropump to generate oscillating flow is newly developed and experimentally tested using an arrangement of thin stainless steel wires of diameter 0.3 mm. A working fluid is accelerated from the charged electrode to the ground electrode by a high electric field. The electric body force responsible for this acceleration is primarily the Coulomb force. To increase the electric...
We present a lumped-parameter dynamic model for a planar poly(dimethylsiloxane) (PDMS) micropump using in-contact, virtually zero-leakage check valves to provide critical insights into the dynamic characteristics of the planar micropump operation. The model features a single-plane microfluidic chamber sandwiched between two check valves, which allows for reliable operation and easy system integration...
This paper presents a piezoelectric stack pump for precise actuator. The piezoelectric pump is characterized by long travel range, precise flow, large driving force, etc. Simulations and experiments showed that the piezoelectric pump has high efficiency and good performance. With a voltage of 100V, the flow rate is linear when the rectangle pulses count, so the displacement can be controlled. And...
An experimental investigation was conducted to develop an electrohydrodynamic (EHD) pump based on a microelectromechanical system (MEMS) technology. To develop an EHD micropump with enhanced pumping performance, including not only long-term driving but high-pressure generation, two electrode plates were prepared. On one, the electrode pattern was designed as a series of planar comb fingers. The electrodes...
The paper deals with optoelectrostatic pumping of conductive liquids in microchannels. In this technique the fluid is heated by the laser irradiation and exposed to an external AC electric field. If the fluid permittivity and conductivity vary with temperature the electric volume force is generated and pumping effect can be achieved. A numerical model of this phenomenon is presented and it is based...
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