Accurate Numerical Simulations & Model Development
at ORAU Workforce Solutions

Date Posted: 3/23/2019

Opportunity Description

Accurate Numerical Simulations and Model Development of Engine Spray and Combustion Phenomena The ARL Engines Research Team (ERT) conducts basic and applied research in various areas including detailed characterization of high pressure engine spray atomization and mixing, multi-component fuel modeling, and combustion and extinction phenomena. Our group features both state-of-the-art experimental facilities and advanced numerical simulation expertise driving physics based model development efforts. The ERT leverages high performace computing to carry out Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) of high pressure atomizing flows. Modeling of high-pressure two-phase turbulent atomizing flows requires consideration of modern numerical methods, typically level-set or volume-of-fluid methods, that can resolve the interface topology accurately while preserving the computational scalability. The level of accuracy also depends on the correct characterization of boundary conditions which drive the aerodynamic instabilities and have an impact on the atomization mechanism. The primary objective of this research is to access the fully resolved optically dense spray region and investigate the atomization behavior of engine sprays with attention to complex injector geometry. The challenges include both characterizing the nozzle flow phenomena, the fluid/solid interaction (needle), while making efficient use of numerical approaches and HPC computing. Research will involve spray model development that will be the result of a high fidelity approach that will be implemented on engineering simulation tools, typically using RANS, for highly efficient computations. The candidate will do research with the ARL S&E to conduct research that will advance the current DNS tools and develop spray breakup models. The candidate will also perform various spray and combustion simulation using CONVERGE (CSI) software, which will be validated with the experimental data from the ARL Spray Combustion Research Laboratory. A preferred candidate should have extensive experiences in CFD pre and post processing analysis, HPC systems/programming, and report/paper writing skills. For additional information, or questions regarding curriculum vitae please contact Dr. Luis Bravo: Dr. Luis Bravo 410-278-9525 Email: [Click Here To Join] Chol-Bum Kweon Phone: 410-278-9319 Email: [Click Here To Join] Click here for more information

Opportunity Snapshot

About Us

Grooming future leaders in science and technology requires enhancing the skills, knowledge and experience of workers early in their careers. To that end, ORAU (Oak Ridge Associated Universities) assists in connecting the best and most diverse students, recent graduates, faculty and professionals with world-class fellowships, internships and jobs, whether in national laboratories, research institutions, federal government offices or private sector R&D departments.

ORAU works with agencies such as the U.S. Army Research Laboratory (ARL) Research Associateship Program (RAP) allow Postdoctoral Fellows, Journeyman Fellows (undergraduate and graduates students and recent graduates), Senior Researchers, and Summer Faculty engage in research initiatives of their own choice, that are compatible with the interests of the government and will potentially contribute to the general effort of the ARL. We work with the Environmental Protection Agency (EPA) to place recent graduates in full-time and part-time jobs in the Office of Research and Development at EPA under the National Student Services Contract. ORAU also works with Center for Medicare and Medicaid Innovation.

Research opportunities include, but are not limited to the following disciplines: Aerospace Engineering, Anthropology, Archeology, Biology, Biochemistry, Biological Engineering, Biomechanical Engineering, Biomedical Engineering, Chemical Engineering, Chemistry, Computer Science, Computer Engineering, Data Science, Electrical Engineering, Environmental Health Risk Assessment, Environmental Science, Entomology, Epidemiology, Ergonomics, Geology, Health Education Mechanical Engineering, Materials Science, Mathematics, Nanotechnology, Photonics, Physics, Public Health Economics, Public Health Policy, Toxicology, and more.

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