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Comparison of rhombic type micromixer to improve mixing efficiency in biomems application

Salleh, Mariam (2013) Comparison of rhombic type micromixer to improve mixing efficiency in biomems application. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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The term lab on chip and micro total analysis system stand synonymous for devices that require handling and processing of small amount of fluid to perform function such as sample preparation, separation, biosensing and detection. Constraint due to the long mixing channel and miniaturized in size but efficiently mixed between fluids. In this project, the three types of rhombic geometry design were studied to characterize mixing performance between the blood sample and reagents. Pure rhombic, branch rhombic and slanted groove rhombic glass based micromixer were proposed to study the mixing performance. The simulation was obtained using CoventorWare 2010. The laminar mixing between blood sample and reagent was simulated at low Reynolds number flow (Re <<1). Reagents used are toluene-low viscosity reagent and carbolic acid- higher viscosity reagent in comparison to blood. The mixing characterization will be optimized based on visualization result of the distribution field in term of viscosity. Image standard deviation (σ) is used to characterize fluid mixing; the lower σ, the better in fluids mixing properties. From this study, it was found that slanted groove rhombic gained the highest mixing efficiency followed by pure rhombic and branch rhombic. This is because grooves structure can improve surface contact area thus stretch and folds the laminar flows.

Item Type: Thesis (Masters)
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA349-359 Mechanics of engineering. Applied mechanics
Depositing User: Normajihan Abd. Rahman
Date Deposited: 08 Jan 2014 00:58
Last Modified: 08 Jan 2014 00:58
URI: http://eprints.uthm.edu.my/id/eprint/4702
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