Flow and mixing characteristics of σ-type plate static mixer with splitting and inverse recombination

Ohkawa, Kazuo; Nakamoto, Takashi; Izuka, Yoshiharu; Hirata, Yushi; Inoue, Yoshiro

doi:10.1016/j.cherd.2008.09.004

Cited by 29 publications

(12 citation statements)

References 4 publications

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“…To characterize the mixing performance of the micromixers in order to better understand and design more efficient micromixers for different applications, a number of techniques, both experimentally [14][15][16][17][18] and theoretically [12,[19][20][21][22][23][24][25][26][27][28], have been employed. Particularly, CFD has been widely used to study the mixing behavior of micromixers in details.…”

Section: Open Accessmentioning

confidence: 99%

Evaluation of Floor-grooved Micromixers using Concentration-channel Length Profiles

Zhang

Yim

et al. 2010

Micromachines

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Abstract:We evaluated the dynamic micromixing performances in slanted groove micromixers (SGM) and staggered herringbone micromixers (SHM) and quantitatively compared their differences using concentration vs. channel length profiles obtained from numerical stimulations. It is found that faster and finer mixing took place in the SHM and the chaotic mixing was more effective at locations closer to the grooves; in comparison, slower and coarser mixing occurred throughout the whole channel of the SGM. Subsequently, the concentration profile-based characterization method was demonstrated in hybrid floor-grooved micromixers to study the interaction of SGM and SHM.

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Section: Open Accessmentioning

confidence: 99%

Evaluation of Floor-grooved Micromixers using Concentration-channel Length Profiles

Zhang

Yim

et al. 2010

Micromachines

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“…Experimentally, color change-based pH indicators, 9,10 iodide-iodate pair reactions, 11,12 and decolorization reaction of iodine with sodium thiosulfate 13 are simple ways to characterize micromixers, while advanced instrumentations, such as confocal microscopy, 8 laser-induced fluorescence, 14,15 and thermal lens spectrometry 16 may provide more detailed information at a higher cost. Theoretically, numerical simulation based on computational fluid dynamics ͑CFD͒ has been widely used to study the mixing process.…”

Section: A Simplified Design Of the Staggered Herringbone Micromixer mentioning

confidence: 99%

A simplified design of the staggered herringbone micromixer for practical applications

Zhang

Yim

et al. 2010

Biomicrofluidics

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We demonstrated a simple method for the device design of a staggered herringbone micromixer (SHM) using numerical simulation. By correlating the simulated concentrations with channel length, we obtained a series of concentration versus channel length profiles, and used mixing completion length L(m) as the only parameter to evaluate the performance of device structure on mixing. Fluorescence quenching experiments were subsequently conducted to verify the optimized SHM structure for a specific application. Good agreement was found between the optimization and the experimental data. Since L(m) is straightforward, easily defined and calculated parameter for characterization of mixing performance, this method for designing micromixers is simple and effective for practical applications.

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“…8.1f), for example, two polytetrafluoroethylene (PTFE) plates containing the structures were sandwiched between two acrylic resin plates and a Y-channel was used for liquid injection into the first element that allows the fluid placement parallel to each other at the exit. The fluids merge in a two layer stream in the interconnecting circular channel and then enter in the second element where they are split into two sub-streams (Ohkawa et al 2008). The process of merging and splitting is repeated into the second element with a 180 turning of the substreams and the generation of four substreams which fed the third element.…”

Section: ð8:8þmentioning

confidence: 99%

Microfluidics in Planar Microchannels: Synthesis of Chemical Compounds On-Chip

Arima

Watts

Pascali

2014

Lab-on-a-Chip Devices and Micro-Total Analysis Systems

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Microreactors are a wide class of devices that are currently playing a prominent role in several research fields such as biology, medicine, food chemistry, environmental analysis, up to the production of compounds in organic chemistry. Several typologies of microreactors have been produced with tubular or planar shapes, of different materials and designs. In this chapter, an overview of planar microchannel-based microreactors and their application to organic chemistry is given. Initially, after recalling the main theoretical parameters of microfluidics, an introduction of the proposed technology and the main requirements to perform mixing, which is essential to perform chemical synthesis on-chip, is presented. Silicon and glass microreactors, the most common planar systems for organic chemistry, are described with the aim of pointing out the most important parameters to be taken into consideration in the planning of a specific microreactor to be used for mixing, purification or crystallization of chemicals at the microscale. Then, several applications of initially described microreactors to organic chemistry for research applications are given. In the next section, the use of planar microchannel microreactors in the field of radiochemistry is reported. The radiopharmaceutical application is not casual, being a sector in which the microreactor technology is very promising, due to the need of quickly producing small and fresh amounts of products in a controlled environment. Finally, for completeness, other approaches beyond planar microchannels are mentioned: mesoreactors towards industrial level synthesis and micro-vessels for radiochemistry.

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Flow and mixing characteristics of σ-type plate static mixer with splitting and inverse recombination

Cited by 29 publications

References 4 publications

Evaluation of Floor-grooved Micromixers using Concentration-channel Length Profiles

Evaluation of Floor-grooved Micromixers using Concentration-channel Length Profiles

A simplified design of the staggered herringbone micromixer for practical applications

Microfluidics in Planar Microchannels: Synthesis of Chemical Compounds On-Chip

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