Last edited by Malakree
Sunday, February 2, 2020 | History

5 edition of Micromixers found in the catalog.

Micromixers

Nam-Trung Nguyen

Micromixers

fundamentals, design and fabrication

by Nam-Trung Nguyen

  • 210 Want to read
  • 18 Currently reading

Published by William Andrew in Norwich, NY .
Written in English

    Subjects:
  • Fluidic devices,
  • Microfluidics,
  • Microelectromechanical systems

  • Edition Notes

    Includes bibliographical references and index.

    StatementNam-Trung Nguyen.
    SeriesMicro & nano technologies
    Classifications
    LC ClassificationsTJ853 .N49 2008
    The Physical Object
    Paginationxiv, 311 p. :
    Number of Pages311
    ID Numbers
    Open LibraryOL18586907M
    ISBN 10081551543X
    ISBN 109780815515432
    LC Control Number2007047527

    The QCM is one of the most developed biosensors that can be operated in a liquid environment using the thickness shear-mode. Acoustic wave based biosensors Most acoustic wave resonators QCM, SAW and FBAR can be used as sensors because all of them are sensitive to mechanical, chemical, optical or electrical perturbations on the surface of the devices [ 8687 ]. The ejection angle of tiny droplets escaping from the host liquid is determined by the Rayleigh angle, but affected by the RF power and height of the mist [ 83 ]. The simulation results show that the highest value of a streaming velocity is located at the interaction area between the droplet and SAW as the highest momentum is delivered at this point. A commonly used method is based on the intensity of segregation. As shown by eq.

    Generally speaking, both experimental and modelling results showed that acoustic waves can induce significant acoustic streaming in the liquid and result in mixing, pumping, ejection and atomization [ 6566 ]. Dover, New York Google Scholar 2. Figure 8 shows a comparison of the transitional and steady streaming velocities induced by a leaky SAW obtained numerically and experimentally with RF power as a function [ 53 ]. The interaction of the SAW with the liquid is a dynamic process involving a transition of the flow. In such low Reynolds number regimes, turbulent mixing does not occur, and hence diffusive species mixing plays an important role but is an inherently slow process. For pumping liquid in a specific direction, the SAW device and microchannels have to be arranged properly.

    This book focuses its attention on an important subtopic of microfluidics; mixing in microscale. This can be used for droplet-based mixing as shown in Fig. The solution is to reduce the surface energy to move the droplets freely on the surface. In conclusion the authors present a rigorous analysis of the viscosity and diffusion in nanochannels and in porous media. It moves backward due to the constraint of the droplet boundary, forming a back flow on the two sides and the bottom of the droplet.


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Micromixers book

Patterns of acoustic streming in a droplet and in bulk liquid. Introduction In the past decade, various microfluidic or lab-on-a-chip [ 1 ] devices have been attempted the analysis of biological and chemical targets in the fields of biomedical diagnostics, food safety control, environmental protection, and animal epidemic prevention, etc.

Passive Micromixers

By adjusting the period of the on-off RF signal and the signal amplitude, it is possible to move droplets with precision distance. The focal point of Micromixers: Fundamentals, Design, and Fabrication is the current applicable knowledge and practical issues in designing, fabricating, and characterizing micromixers in the chemical and biochemical industries.

This can be utilized to detect viruses and genetic disorders, diagnose early stage diseases and cancers [ 9192 ]. SAW micropumps and micromixers When the liquid is in the SAW path, acoustic moment and energy can be coupled into the liquid to induce acoustic streaming and flow. It utilizes no energy input except the mechanism pressure head used to drive the fluid flow at a constant rate.

Various surface coating technologies have been developed to increase the contact angle of the water droplet. In the following section, highlight the acoustic wave sensor technologies. It would be difficut to apply an RF signal with the exact frequency match to that of the SAW device, leading to the operation of SAW-microfluidics under mismatching conditions.

They have many applications such as sensing pressure, humidity, temperature, strain stressacceleration force, vibration, flow, pH values, radiation, electric fields etc. Reprinted with permission from AIP, Appl.

SAW can be utilized for moving liquid droplets. The numerical simulation requires a few software modules to implement the multiphysics modelling for the Micromixers book components as well as the viscous liquid body, and requires the consideration of coupling between the modules.

At a fixed IDT aperture, a small doplet will have a low streaming velocity as the RF power can not be fully coupled into the liquid, and the streaming velocity increases with the droplet size, then reduces as the droplet size becomes larger than the aperture of the IDT.

For better understanding, 3D simulation is necessary to study the streaming phenomenon induced by leaky wave [ 44 ]. The Micromixers book point of Micromixers: Fundamentals, Design, and Fabrication is the current applicable knowledge and practical issues in designing, fabricating, and characterizing micromixers in the chemical and biochemical industries.

QCM sensors Although the piezoelectric effect was discovered in the late 19th Century, quartz crystal resonators only found widespread applications in electronics, material and biological researches when it was demonstrated that there was a linear relationship between mass adsorbed on the surface and the resonant frequency of the crystal in by Sauerbrey [ 93 ].

Reprinted with permission from Institute of Physics, J. When a travelling acoustic wave encounters the liquid in the channel, streaming can be very effective mixing mechanism, and this mixing can be further enhanced by using curved IDT structures as shown in Fig.

Provides the basic terminology and fundamental physics of transport effects used for designing micromixers. The final prices may differ from the prices shown due to specifics of VAT rules About this book This book describes physical, mathematical and experimental methods to model flows in micro- and nanofluidic devices.

About the authors Valery Ya. Keywords: active mixer, microfluidic mixing, passive micromixer 1. He is author of 4 monographs and more than scientific papers. One must solve the full set of nonlinear hydrodynamic equations consisting of the Navier-Stokes equations, the continuity equation and an equation of state for an incompressible fluid driven by the time-dependent boundary condition.

SAW atomizer If the RF power coupled to the liquid on a hydrophilic surface is sufficiently large, tiny droplets with volumes in the range of a few femtolitres fls to pls can be generated and escape from the surface of the host liquid, forming a continuous mist of droplets as shown in Fig.

Figure 12 is a comparison of the streaming patterns obtained experimentally and numerically, showing a good matching of the patterns. Figure 10 shows one of the results obtained by Alghane et al [ 53 ], demonstrating that the steady streaming velocity is approximately linearly correlated to the RF power applied.

SAW atomizers are able to produce aerosol droplets with a good particle size distribution. This leads to a complete diminishing of the acoustic force within a few hundreds of micrometers from the interaction point between the SAW and the liquid.

Science Technology Engineering Nonfiction A wide range of applications in chemistry and biochemistry are driving the rapid development of microfluidics. Now he is assistant professor of the Siberian Federal University.

Folding flow micromixers are also less sensitive to clogging compared to split and recombine mixers.Acoustic wave based microfluidics.

Many microfluidic technologies have been explored and developed [1,3], including two major classes of devices: active devices such as micropumps, micromixers and droplet generators, and passive components such as microchannels, valves and hildebrandsguld.com mechanisms of micropumps vary hildebrandsguld.com by: 5.

ZAlerts allow you to be notified by email about the availability of new books according to your search query. A search query can be a title of the book, a name of. Sep 21,  · Numerical and experimental investigations on liquid mixing in T-type micromixers Book of Abstracts, p.9th International Conference on Microreaction Technology Sep Title: Director at Electronic Cooling.

Dec 08,  · The review first presents the different micromixer types and designs. Micromixers in this review are categorized as passive micromixers and active micromixers. Due to the simple fabrication technology and the easy implementation in a complex microfluidic system, passive micromixers will be the focus of this hildebrandsguld.com by: This review reports the progress on the recent development of micromixers.

The review first presents the different micromixer types and designs. Micromixers in this review are categorized as. MDPI uses a print-on-demand service. Your book will be printed and delivered directly from one of three print stations, allowing you to profit from economic shipping to any country in the world.

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