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Numerical study of mixing and flow field in microchannel with mixing chamber
아매드 앤사리(M. A. Ansari),김광용(Kwang-Yong Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The computational fluid dynamics has been applied to study the mixing of fluids in microchannel with mixing circular chambers designed to create self circulating flow operating at low Reynolds number. The effect of two design parameters w/d and θ on mixing and flow field has been evaluated. Mixing has been evaluated using a parameter, called mixing index based on the variance of mass fraction. The presence of flow recirculation zone in the circular chamber increases mixing performance of the device. Mixing performance improves with increase in the value of θ. Higher mixing performance is shown at lower w/d ratio.
Numerical Study on Mixing in Staggered Herringbone Micromixer
M. A. Ansari(아매드 앤사리),Kwang-Yong Kim(김광용) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The flow of fluid in simple microdevices is laminar and uniaxial which makes mixing of the fluids difficult which can be overcome by specially designed structure on the surface. Computational fluid dynamics was applied to study mixing in specially designed staggered Herringbone grooves on one surface of the micromixer. Two fluid model at the two inlets was used in the simulation to visualize the actual mixing phenomenon. The flow field shows that the geometry is quite effective in creating transverse flow which stretch and fold the two fluids. Mass fraction of the fluids at various locations is used to qualitatively analyze mixing. CFD methods can be used to understand mixing of fluids in these micromixers and to optimize it.