Effect of baffle height and reynolds number on fluid mixing

C. K. Chung; C. Y. Wu; T. R. Shih

doi:10.1007/s00542-007-0511-1

Effect of baffle height and reynolds number on fluid mixing

C. K. Chung, C. Y. Wu, T. R. Shih

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

In this paper, both numerical simulation and experiment were performed to investigate the mixing process within mixing chambers of the planar micromixer with three baffles at varied baffle height. The presence of three baffles causes the flow to separate and creates the recirculation and back flow within mixing chambers. The fluid mixing was greatly influenced by the baffle height and Reynolds number (Re) related to the size of recirculation zone. Larger baffle height or Re produces larger recirculation zone and convective mixing. The micromixer with 350 μm high baffles in 400 μm wide channel results in over 95% mixing at Re = 80 from the simulation results. The experiment results confirm the above simulation results qualitatively. This planar micromixer has the merits of simple design and easy fabrication as compared to the three-dimensional passive micromixers.

Original language	English
Pages (from-to)	1317-1323
Number of pages	7
Journal	Microsystem Technologies
Volume	14
Issue number	9-11
DOIs	https://doi.org/10.1007/s00542-007-0511-1
Publication status	Published - 2008 Oct

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Hardware and Architecture
Electrical and Electronic Engineering

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10.1007/s00542-007-0511-1

Cite this

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title = "Effect of baffle height and reynolds number on fluid mixing",

abstract = "In this paper, both numerical simulation and experiment were performed to investigate the mixing process within mixing chambers of the planar micromixer with three baffles at varied baffle height. The presence of three baffles causes the flow to separate and creates the recirculation and back flow within mixing chambers. The fluid mixing was greatly influenced by the baffle height and Reynolds number (Re) related to the size of recirculation zone. Larger baffle height or Re produces larger recirculation zone and convective mixing. The micromixer with 350 μm high baffles in 400 μm wide channel results in over 95% mixing at Re = 80 from the simulation results. The experiment results confirm the above simulation results qualitatively. This planar micromixer has the merits of simple design and easy fabrication as compared to the three-dimensional passive micromixers.",

author = "Chung, {C. K.} and Wu, {C. Y.} and Shih, {T. R.}",

note = "Funding Information: This work is partial sponsored by National Science Council (NSC) under contract No NSC 94-2212-E-006-055. We pay our great thanks to the Center for Micro/Nano Science and Technology (CMNST) in National Cheng Kung University for the access of process and analysis equipments. We would also like to thank National Center for High-performing Computing (NCHC) for providing a computational fluid dynamics software in this work.",

year = "2008",

month = oct,

doi = "10.1007/s00542-007-0511-1",

language = "English",

volume = "14",

pages = "1317--1323",

journal = "Microsystem Technologies",

issn = "0946-7076",

publisher = "Springer Verlag",

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AU - Chung, C. K.

AU - Wu, C. Y.

AU - Shih, T. R.

N1 - Funding Information: This work is partial sponsored by National Science Council (NSC) under contract No NSC 94-2212-E-006-055. We pay our great thanks to the Center for Micro/Nano Science and Technology (CMNST) in National Cheng Kung University for the access of process and analysis equipments. We would also like to thank National Center for High-performing Computing (NCHC) for providing a computational fluid dynamics software in this work.

PY - 2008/10

Y1 - 2008/10

N2 - In this paper, both numerical simulation and experiment were performed to investigate the mixing process within mixing chambers of the planar micromixer with three baffles at varied baffle height. The presence of three baffles causes the flow to separate and creates the recirculation and back flow within mixing chambers. The fluid mixing was greatly influenced by the baffle height and Reynolds number (Re) related to the size of recirculation zone. Larger baffle height or Re produces larger recirculation zone and convective mixing. The micromixer with 350 μm high baffles in 400 μm wide channel results in over 95% mixing at Re = 80 from the simulation results. The experiment results confirm the above simulation results qualitatively. This planar micromixer has the merits of simple design and easy fabrication as compared to the three-dimensional passive micromixers.

AB - In this paper, both numerical simulation and experiment were performed to investigate the mixing process within mixing chambers of the planar micromixer with three baffles at varied baffle height. The presence of three baffles causes the flow to separate and creates the recirculation and back flow within mixing chambers. The fluid mixing was greatly influenced by the baffle height and Reynolds number (Re) related to the size of recirculation zone. Larger baffle height or Re produces larger recirculation zone and convective mixing. The micromixer with 350 μm high baffles in 400 μm wide channel results in over 95% mixing at Re = 80 from the simulation results. The experiment results confirm the above simulation results qualitatively. This planar micromixer has the merits of simple design and easy fabrication as compared to the three-dimensional passive micromixers.

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EP - 1323

JO - Microsystem Technologies

JF - Microsystem Technologies

IS - 9-11

ER -

Effect of baffle height and reynolds number on fluid mixing

Abstract

All Science Journal Classification (ASJC) codes

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