نتایج جستجو برای: micropump
تعداد نتایج: 372 فیلتر نتایج به سال:
A numerical optimization methodology is applied to improve the design of a microchannel structure used in a valveless micropump. The flow simulation algorithm employs the control volume method for Cartesian grids, while advanced numerical techniques are implemented for automatic generation of unstructured, adaptively refined grids and for the representation of irregular boundaries. Several geom...
Closed form analytical equations are important tools for predicting and optimizing the behavior of a piezoelectric microactuator for micropump applications. However, there is no reliable analytical solution to date to analyze the behavior of a circular piezoelectric microactuator for a valveless micropump. In this paper, a linear strain distribution is assumed across the thickness of the passiv...
A valveless electromagnetic (EM) micropump with a matrix-patterned magnetic polymer composite actuator membrane structure was successfully designed and fabricated. The composite membrane structure is made of polydemethylsiloxane (PDMS) that is mixed with magnetic particles and patterned in matrix blocks. The matrix magnetic composite membrane was fabricated using a soft lithography process and ...
PURPOSE To demonstrate the safety and surgical feasibility of the first-in-man ocular implant of a novel Posterior MicroPump Drug Delivery System (PMP) in patients with diabetic macular edema (DME) and to report on the device capabilities for delivering a programmable microdose. METHODS This was a single center, single arm, open-label, prospective study. Eleven patients with DME and visual ac...
A novel design for a strip-type microthrottle pump with a rectangular actuator geometry is proposed, with more efficient chip surface consumption compared to existing micropumps 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-flu...
Micropumps have promising applications in biomedical devices andmicro total analysis systems. Conjugated polymer actuators provide an important potential mechanism for realizing micropumps because of their amenability to miniaturization and low actuation voltages. In this paper we present a novel, conjugated polymer petal-actuated diaphragm micropump, which is in contrast to the typical diaphra...
This paper reports on the fabrication and experimental characterisation of improved design AC eletroosmotic micropumps. Since the first study and analysis of AC electroosmosis by Ramos et al. [1], many devices have been fabricated and tested [2]. The basic planar electrode design was improved and increased pumping velocities were measured. Among the proposed improvements, 3D electrode design se...
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