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Publication
Featured researches published by Dokyun Kim.
52nd AIAA/SAE/ASEE Joint Propulsion Conference | 2016
Luis Bravo; Dokyun Kim; Frank Ham; Christopher F. Powell; Daniel Duke; Katarzyna E. Matusik; Alan L. Kastengren; Andrew B. Swantek
In direct injection engines, the jet primary and secondary breakup processes have a significant influence on the fuel/air mixture formation and drop-size distribution directly affecting the fuel conversion efficiency and combustion characteristics. In this work the disintegration process of turbulent liquid jets from a realistic diesel injector issuing into a still environment is investigated numerically using a coupled liquid/gas interface capturing technique and a high-fidelity DNS/LES approach. This study is aimed at assessing the influence of NJFCP aviation jet fuel mixtures on the disintegration and droplet-size spray characteristics at simulated diesel operating conditions. For this purpose, an unstructured unsplit Volume-of-Fluid method is employed in conjunction with a realistic diesel injector geometry to simulate the pulsed jet disintegration and breakup process. Flow and droplet PDF statistics are extracted to demonstrate the impact of physical properties (A2, C3 fuel) on the mixing behavior and droplet distribution. The simulations are compared against X-ray radiography volume fraction measurements from Argonne National Laboratory and also serve as numerical benchmarks for calibration of lower fidelity models.
Bulletin of the American Physical Society | 2006
Dokyun Kim; Marcus Herrmann; Parviz Moin
Atomization and Sprays | 2018
Luis Bravo; Dokyun Kim; Frank Ham; Simon Su
Bulletin of the American Physical Society | 2011
Dokyun Kim; Parviz Moin
2018 Joint Propulsion Conference | 2018
Luis Bravo; Dokyun Kim; Frank Ham; Kevin Kerner
2018 Joint Propulsion Conference | 2018
Luis Bravo; Dokyun Kim; Frank Ham; Kevin Kerner
Bulletin of the American Physical Society | 2016
Dokyun Kim; Luis Bravo; Katarzyna E. Matusik; Daniel Duke; Alan L. Kastengren; Andy Swantek; Christopher F. Powell; Frank Ham
Bulletin of the American Physical Society | 2014
Taejong Yu; Hojoon Moon; Donghyun You; Dokyun Kim; Andrey Ovsyannikov
Bulletin of the American Physical Society | 2014
Christopher Ivey; Luis Bravo; Dokyun Kim
Bulletin of the American Physical Society | 2014
Kyung-Soo Yi; Hye Jung Kim; Dokyun Kim