Microreaction technology in practice

Song, Kwang Ho; Kwon, Youngwoon; Choe, Joong-Seon

doi:10.1016/s0167-2991(06)81680-0

Cited by 3 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The channel of microreactor is known as microchannel due to the micro size, while under microreactor group, there are micro mixers which are designed for mixing purpose. Numerous plausible advantages of microreactors for the pharmaceutical and fine chemical industries have been realized, thanks to their excellent capability for mixing and for thermal exchanges which increase yields and selectivity of reactions [1][2][3][4].…”

Section: The Microreactors and Microchannelmentioning

confidence: 99%

Computational Fluid Dynamics of Mixing Performance in Microchannel

Termizi¹,

Shukor²

2020

Computational Fluid Dynamics Simulations

View full text Add to dashboard Cite

In microchannel, fluid viscous effect becomes dominant, and the micro-flow typically falls in laminar regime. Mixing of fluid in the absence of turbulence is a slow molecular process as it is solely dependent on diffusion. Fast and complete mixing of relevant fluids is of crucial importance in many chemical engineering processes, thus computational fluid dynamics simulation on mixing in microchannel is the main topic in this chapter. The simulation was based on laminar flow and convective diffusion equation model. The factors affecting the mixing performance in microchannel was further simulated. The finding provides some insight of transport phenomena on mixing in microchannel.

show abstract

Section: The Microreactors and Microchannelmentioning

confidence: 99%

Computational Fluid Dynamics of Mixing Performance in Microchannel

Termizi¹,

Shukor²

2020

Computational Fluid Dynamics Simulations

View full text Add to dashboard Cite

show abstract

Numerical analysis of a microfluidic mixer and the effects of different cross-sections and various input angles on its mixing performance

Farahinia

Zhang

2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Micromixers have better efficiency in terms of both the timescale of chemical kinetics and diffusive transport compared to the conventional macro-mixers. The mixing efficiency in micromixers is an important performance indicator in mixers. This paper presents a numerical study of how the design of a micromixer along with the design of the mixing process affects the mixing efficiency. Specifically, two different types of cross-sections of the channel in micromixers, namely circular and rectangular cross-sections, together with the inlet angle of the channel, were studied. The process parameters, such as the inlet velocity of fluids and diffusion coefficient, were studied as well. The result shows that the circular cross-section can sustain a large pressure difference without undergoing any remarkable distortion and deformation, and it can achieve better performance. The result further indicates that the inlet velocity and diffusion coefficient have significant effects on mixing efficiency; specifically, the low inlet velocity and high diffusion coefficient value can lead to a better mixing performance. However, different input angles alone could not make the mixing efficiency change noticeably. In other words, the mixing performance of such micromixers relies more on the inlet velocity and diffusion coefficient than on the fluid flow angle in the inlet. Keywords Micromixers • COMSOL multiphysics • Pressure drop • Input angles • Mixing efficiency • Cross-section List of symbols A Cross-sectional area (m 2) C Concentration of reagents (mol/m 3) D Diffusion coefficient (m 2 /s) F Force (N) f Mole fraction (-) j Diffusion (mol/s m 2) I Identity matrix (-) L Microchannel length (m) M i Mixing efficiency (%) R Change in concentration rate (mol/s m 3) U Velocity (m/s) Density (kg/m 3) Viscosity (Pa s) Standard deviation (-)

show abstract