Second Law Analysis of a Passive Micromixer with Flow Obstacles

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" Second Law Analysis of a Passive Micromixer with Flow Obstacles "
Ferguson, Steven E., Jr. Lemley, Evan

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1054435
Doc. No	:	TL53552
Main Entry	:	Ferguson, Steven E., Jr.
Title & Author	:	Second Law Analysis of a Passive Micromixer with Flow Obstacles\ Ferguson, Steven E., Jr.Lemley, Evan
College	:	University of Central Oklahoma
Date	:	2020
Degree	:	M.S.M.E.
student score	:	2020
Note	:	78 p.
Abstract	:	Passive micromixers focus on variations in the channel geometry and the presence of flow obstacles as a means of improving mixing efficiency. An analysis of these geometries can provide useful information for further mixer design iteration. These passive micromixers have applications in biosciences, in particular as point-of-care diagnostic testing devices. Because these mixers utilize the channel geometry, rather than moving parts, to increase mixing efficiency, they can be more easily deployed in developing or relatively undeveloped locales. This thesis presents a detailed computational analysis of a channel design that utilizes obstacles that split and recombine the fluid flow in a rectangular microchannel. Numerical simulations were created using computational fluid dynamics software running on a supercomputer cluster. The Second Law of Thermodynamics is utilized to identify areas of irreversibility due to both chaotic advection induced by flow obstacles and diffusion. The design is analyzed for a range of Reynolds numbers typical to micromixers. Additionally, different inlet velocity ratios are analyzed to examine whether this can potentially improve mixing efficiency within this channel design.
Descriptor	:	Computational physics
	:	Mechanical engineering
Added Entry	:	Lemley, Evan
Added Entry	:	University of Central Oklahoma