Numerical simulation of fluid-structure interaction in a MEMS diaphragm drop ejector

Pan, Feixia; Kubby, Joel; Chen, Jingkuang

doi:10.1088/0960-1317/12/1/311

Cited by 27 publications

(15 citation statements)

References 19 publications

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“…On the hydrodynamics side, the no-slip condition at the fluid-solid interface forces the fluid to move with the diaphragm. On the structural dynamics side, the hydrodynamic forces (the hydrodynamic pressure and the viscous shear) exerted on the diaphragm determine the transient displacement of the diaphragm [Pan et al 2002].…”

Section: Overview Of Microfluidic Theorymentioning

confidence: 99%

Design automation for microfluidics-based biochips

Chakrabarty

Zeng²

2005

J. Emerg. Technol. Comput. Syst.

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Advances in microfluidics technology offer exciting possibilities in the realm of enzymatic analysis, DNA analysis, proteomic analysis involving proteins and peptides, immunoassays, implantable drug delivery devices, and environmental toxicity monitoring. Microfluidics-based biochips are therefore gaining popularity for clinical diagnostics and other laboratory procedures involving molecular biology. As more bioassays are executed concurrently on a biochip, system integration and design complexity are expected to increase dramatically. This paper presents different actuation mechanisms for microfluidics-based biochips, as well as associated design automation trends and challenges. The underlying physical principles of eletrokinetics, electrohydrodynamics, and thermocapillarity are discussed. Next, the paper presents an overview of an integrated system-level design methodology that attempts to address key issues in the modeling, simulation, synthesis, testing and reconfiguration of digital microfluidics-based biochips. The top-down design automation will facilitate the integration of fluidic components with microelectronic component in next-generation system-on-chip designs.

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Section: Overview Of Microfluidic Theorymentioning

confidence: 99%

Design automation for microfluidics-based biochips

Chakrabarty

Zeng²

2005

J. Emerg. Technol. Comput. Syst.

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“…However, most of the previous analyses are limited to numerical simulations. Moreover, they were performed to study droplet evolution under simplified driving BCs, such as the pressure or velocity histories specified at the nozzle inlet, the rigid movingboundary problem, etc., without taking account of elastic deformation of the piezoelectric actuator and the coupling between the solid and flow field (Yeh 2001;Pan et al 2002;Wijshoff 2004). To authors' knowledge, there is lacking of PIJ study taking account of elastic deformation of the piezoelectric actuator as well as the coupling between the solid and flow field.…”

Section: Introductionmentioning

confidence: 99%

Effects of actuating waveform, ink property, and nozzle size on piezoelectrically driven inkjet droplets

Liou

Chan

Shih

2009

Microfluid Nanofluid

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Computational fluid dynamics and micro-flow visualization (l-FV) have been complementarily performed to study the evolution of a single droplet ejected from a bend-mode piezoelectric inkjet printhead. The numerical simulation is characterized by the coupled piezoelectric-structural-fluid solution procedure and verified by the l-FV results. The in-house numerical code is subsequently applied to investigate the influences of electric voltage u pp , pulse shape, ink property, and nozzle diameter D n on the droplet volume, velocity, and configurations. u pp studied ranges from 14 to 26 V and pulse shape is explored by varying the key time intervals with fixed voltage slopes. The influence of ink property is examined by investigating the dynamic viscosity l and surface tension r separately. Investigation on the effects of nozzle diameter is also conducted by decreasing D n from 26 to 11 at 3 lm interval. The computed results are found in good agreement with the experimental ones. New findings are to discover the critical ranges of electric waveform parameters, l, and r outside which the phenomena of satellite droplets and puddle formation at the nozzle opening are absent. In addition, the imbedded physical rationales for these critical ranges are provided. The results are also new in terms of the identifications of the critical r and D n for the reference of improving the droplet quality.

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“…For example, Kamisuki et al (1998Kamisuki et al ( , 2000 described a micro-electro-mechanical diaphragm drop ejector, and experimentally characterized the droplet formation based on this design. Pan et al (2002) numerically simulated the droplet formation process from this same design using commercially available software. This device is based on a rigid nozzle, driven by a piezoelectric actuated diaphragm.…”

Section: Introductionmentioning

confidence: 99%