Youngjun Lee Email & Phone Number

Lemont, Illinois, United States

I am developing and designing numerical algorithms and performance portability layers for heterogeneous systems for high-performance multiphysics simulation software Flash-X. The goal is to achieve better accuracy and performance with reduced memory requirements (numerical methods) across different hardware platforms, including GPUs (performance portability).I also work on designing a simulation setup for a high-energy electron beam study. The project aims to couple two different simulators - particle-matter interactions and magnetohydrodynamics (MHD) codes.The simulation design needs to have complex physical models, so I am examining and modifying physics models of multi-physics, high-performance scientific codes, and analyzing simulation data to minimize numerical artifacts and tune multiple parameters.

I developed a highly accurate and efficient numerical algorithm for solving partial differential equations. This new design concept demonstrated more than two times faster performance while maintaining the same order of accuracy compared to the traditional methods.I wrote a high-performance simulation code using MPI parallelization and HDF5 for parallel I/O to test and analyze my numerical methods in the high-performance computing machines.

Doctor Of Philosophy (Ph.D.), Applied Mathematics

Master Of Science (M.S.), Plasma Physics

Bachelor Of Science (B.S.), Physics