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Carol Livermore. Collins, Kimberlee C. (Kimberlee Chiyoko) Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering 2009-06-30T16:15:07Z 2009-06-30T16:15:07Z 2008 2008 http://hdl.handle.net/1721.1/45770 318454016 Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008. Includes bibliographical references (p. 23-24). The challenge of achieving rapid mixing in microchannels is addressed through a computational fluid dynamics (CFD) study using the ADINA-F finite element program. The study is motivated by the need to design an adequate mixing chamber for aqueous chemical reactants in a micro steam generator. The study focuses on the geometric optimization of a static micromixer channel by considering the trade-off between mixing quality and pressure drop. Both zigzag and straight channels are evaluated, in addition to channels with differing amounts of added obstruction features. Due to computational limits, the numerical analysis is conducted in two dimensions. The results indicate that hydrodynamic focusing of the reactant at the inlet, in addition to the amount and density of added obstruction features, has the most significant impact on mixing efficiency and increased pressure drop. The study presents mixing quality and pressure drop trends that provide useful information for the micro steam generator mixing chamber design. by Kimberlee C. Collons. S.B. 24 p. eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Mechanical Engineering. Computational fluid dynamic (CFD) optimization of microfluidic mixing in a MEMS steam generator Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="ca3d4b35-5367-4a5a-bc19-19a897a33eac"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Computational fluid dynamic (CFD) optimization of microfluidic mixing in a MEMS steam generator</Title> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2008</PublicationDate> <Authors> <Author> <DisplayName>Collins, Kimberlee C. (Kimberlee Chiyoko)</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Mechanical Engineering.</Keyword> <Abstract>The challenge of achieving rapid mixing in microchannels is addressed through a computational fluid dynamics (CFD) study using the ADINA-F finite element program. The study is motivated by the need to design an adequate mixing chamber for aqueous chemical reactants in a micro steam generator. The study focuses on the geometric optimization of a static micromixer channel by considering the trade-off between mixing quality and pressure drop. Both zigzag and straight channels are evaluated, in addition to channels with differing amounts of added obstruction features. Due to computational limits, the numerical analysis is conducted in two dimensions. The results indicate that hydrodynamic focusing of the reactant at the inlet, in addition to the amount and density of added obstruction features, has the most significant impact on mixing efficiency and increased pressure drop. The study presents mixing quality and pressure drop trends that provide useful information for the micro steam generator mixing chamber design.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>