Unsteady flow mixing effect in bionic micro-flow channel

Chin Tsan Wang, C. T. Chang, Tzu Yang Hu, Tzong-Shyng Leu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Micro-mixers are studied extensively due to their high mixing efficiency. A periodic flow variation at the channel entrance will be used to drive fluids in this study to achieve a mixing effect. Numerical analysis is used and verified by experiment in the study to identify the group of operating factors, such as Reynolds number Re, the driving phase difference θ and the driving frequency ratio Fr, needed for the fluid to achieve the best mixing result for a bionic micro-mixer. It is found in this study that the mixing efficiency is related to the velocity period distribution; the more even the velocity period distribution becomes, the better the mixing efficiency and the best group of operating factors is found (Re2 = 1, Rer = 0.85, Fr = 1, F 2 = 50 Hz, I/Am = 1, θ = 3/4 π). Furthermore, a larger aspect ratio results in a better mixing efficiency. The influence of wall-effect on the flow mixing decreases with AR. It is found that there exists an optimal mixing efficiency at aspect ratio AR = 10. These research results could be used to improve the design of a bionic micro-mixer.

Original languageEnglish
Article numberA14
JournalInternational Journal of Chemical Reactor Engineering
Volume9
Publication statusPublished - 2011 Feb 18

Fingerprint

Bionics
Channel flow
Unsteady flow
Velocity distribution
Aspect ratio
Fluids
Numerical analysis
Reynolds number

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

@article{596f9b9e40d94d768320fbe9a43b20ae,
title = "Unsteady flow mixing effect in bionic micro-flow channel",
abstract = "Micro-mixers are studied extensively due to their high mixing efficiency. A periodic flow variation at the channel entrance will be used to drive fluids in this study to achieve a mixing effect. Numerical analysis is used and verified by experiment in the study to identify the group of operating factors, such as Reynolds number Re, the driving phase difference θ and the driving frequency ratio Fr, needed for the fluid to achieve the best mixing result for a bionic micro-mixer. It is found in this study that the mixing efficiency is related to the velocity period distribution; the more even the velocity period distribution becomes, the better the mixing efficiency and the best group of operating factors is found (Re2 = 1, Rer = 0.85, Fr = 1, F 2 = 50 Hz, I/Am = 1, θ = 3/4 π). Furthermore, a larger aspect ratio results in a better mixing efficiency. The influence of wall-effect on the flow mixing decreases with AR. It is found that there exists an optimal mixing efficiency at aspect ratio AR = 10. These research results could be used to improve the design of a bionic micro-mixer.",
author = "Wang, {Chin Tsan} and Chang, {C. T.} and Hu, {Tzu Yang} and Tzong-Shyng Leu",
year = "2011",
month = "2",
day = "18",
language = "English",
volume = "9",
journal = "International Journal of Chemical Reactor Engineering",
issn = "1542-6580",
publisher = "Berkeley Electronic Press",

}

Unsteady flow mixing effect in bionic micro-flow channel. / Wang, Chin Tsan; Chang, C. T.; Hu, Tzu Yang; Leu, Tzong-Shyng.

In: International Journal of Chemical Reactor Engineering, Vol. 9, A14, 18.02.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unsteady flow mixing effect in bionic micro-flow channel

AU - Wang, Chin Tsan

AU - Chang, C. T.

AU - Hu, Tzu Yang

AU - Leu, Tzong-Shyng

PY - 2011/2/18

Y1 - 2011/2/18

N2 - Micro-mixers are studied extensively due to their high mixing efficiency. A periodic flow variation at the channel entrance will be used to drive fluids in this study to achieve a mixing effect. Numerical analysis is used and verified by experiment in the study to identify the group of operating factors, such as Reynolds number Re, the driving phase difference θ and the driving frequency ratio Fr, needed for the fluid to achieve the best mixing result for a bionic micro-mixer. It is found in this study that the mixing efficiency is related to the velocity period distribution; the more even the velocity period distribution becomes, the better the mixing efficiency and the best group of operating factors is found (Re2 = 1, Rer = 0.85, Fr = 1, F 2 = 50 Hz, I/Am = 1, θ = 3/4 π). Furthermore, a larger aspect ratio results in a better mixing efficiency. The influence of wall-effect on the flow mixing decreases with AR. It is found that there exists an optimal mixing efficiency at aspect ratio AR = 10. These research results could be used to improve the design of a bionic micro-mixer.

AB - Micro-mixers are studied extensively due to their high mixing efficiency. A periodic flow variation at the channel entrance will be used to drive fluids in this study to achieve a mixing effect. Numerical analysis is used and verified by experiment in the study to identify the group of operating factors, such as Reynolds number Re, the driving phase difference θ and the driving frequency ratio Fr, needed for the fluid to achieve the best mixing result for a bionic micro-mixer. It is found in this study that the mixing efficiency is related to the velocity period distribution; the more even the velocity period distribution becomes, the better the mixing efficiency and the best group of operating factors is found (Re2 = 1, Rer = 0.85, Fr = 1, F 2 = 50 Hz, I/Am = 1, θ = 3/4 π). Furthermore, a larger aspect ratio results in a better mixing efficiency. The influence of wall-effect on the flow mixing decreases with AR. It is found that there exists an optimal mixing efficiency at aspect ratio AR = 10. These research results could be used to improve the design of a bionic micro-mixer.

UR - http://www.scopus.com/inward/record.url?scp=79951568668&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79951568668&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:79951568668

VL - 9

JO - International Journal of Chemical Reactor Engineering

JF - International Journal of Chemical Reactor Engineering

SN - 1542-6580

M1 - A14

ER -