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RECORD NUMBER: 5 OF 1132

OLS Field Name OLS Field Data
Main Title A computational study of mixing in jet stirred reactors /
Author Crawford, Michael R.,
Other Authors
Author Title of a Work
Mittal, Gaurav,
Publisher University of Akron,
Year Published 2014
OCLC Number 959236930
Subjects Chemical reactors. ; Computational fluid dynamics. ; Chemical kinetics. ; Jets--Fluid dynamics. ; Impellers. ; Mechanical engineering.
Internet Access
Description Access URL
http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1405328296
http://rave.ohiolink.edu/etdc/view?acc_num=akron1405328296
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELBM  QA924.C73 2014 AWBERC Library/Cincinnati,OH 10/05/2016
Collation xiii, 84 pages : illustrations (chiefly color) ; 28 cm
Notes
Includes bibliographical references (pages 81-84). Cover title. "August, 2014." Advisor, Gaurav Mittal; Faculty readers, Siamak Farhad, Abhilash Chandy; Department Chair, Sergio Felicelli; Dean of the College, George K. Haritos; Dean of the Graduate School, George R. Newkome.
Contents Notes
Jet stirred reactors (JSRs) are frequently employed for studying homogeneous gas phase chemical kinetics of fuels. The most challenging aspect of JSR is the achievement of sufficiently rapid mixing by turbulent jets so that the temperature and concentration fields inside the reactor could be considered homogeneous. However, there has not been any investigation in the literature which conclusively addresses that rapid mixing is indeed achieved. In this work, computational fluid dynamics (CFD) simulations for JSRs are conducted to gain insights into the dynamics of jet mixing. CFD simulations are conducted for some of the geometries commonly used by researchers and mixing inside the reactor is visualized by computationally tracking an inert tracer pulse. Results suggest that some of the commonly used reactors could have significant concentration non-homogeneity and therefore may not be suitable for chemical kinetic studies. For conditions when the flow in the reactor is sufficiently turbulent and recycling rate is high, back mixing can become problematic even though the concentration field is more or less homogeneous. As a consequence, the vast chemical kinetic data obtained from such facilities is questionable. Furthermore, modifications to the design of JSR are considered that could significantly improve concentration homogeneity. An alternative geometry of the reactor is evaluated and shown to be promising. A new JSR is designed and fabricated for studying homogeneous gas phase chemical kinetics over a range of pressures from atmospheric to elevated (up to 50 bar).