Si Liu

Si Liu

Research Associate

High Performance Computing


Si Liu has joined the high performance computing group at TACC as a Research Associate since 2013. He is conducting research on HPC software tools and providing the science and engineering community with superior user experience. He is also collaborating with academic and industrial institutions all over the world on various data-intensive research projects that demand advanced HPC technology and cyberinfrastructure, including realizing high-resolution WRF simulations, improving the parallel IO performance of HDF5 and OpenFOAM, and setting up computing environment for a large data analysis effort of CERN's ALICE experiment.

During 2009-2013, Si worked as a software engineer in Computational Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). He participated in establishing the Yellowstone supercomputer system in the NCAR-Wyoming Supercomputing Center (NWSC) for climate research, provided consulting services and technical support to scientific computing communities, and collaborated with scientists on climate models development and optimization.

Research Interests

Large scale scientific parallel computing

Performance analysis, benchmarking, and optimization

Computational mathematics, numerical linear algebra

Domain decomposition methods, multigrid and multilevel methods

Inverse problems in partial differential equations

Climate research and weather forecasting

Selected Publications

R. Kelly, S. Ghosh, S. Liu, D. Del Vento, R. Valent, The NWSC benchmark suite using scientific throughput to measure supercomputer performance, ACM SC '11 State of the Practice, 2011.
T. Engel, S. Ghosh, D. Hart, R. Kelly, S. Liu, R. Valent, S. Ghosh, System-level monitoring of floating-point performance to improve effective system utilization, ACM SC '11 State of the Practice, 2011
S. Liu, X.-C. Cai, Two-level multiplicative domain decomposition algorithm for recovering the Lame coefficient in biological tissues, Lecture Notes in Computational Science and Engineering, Springer, 2010.
X.-C. Cai, S. Liu, J. Zhou, Parallel fully coupled algorithms for inverse elliptic problems, Comm. App. Math. Comp. Sci., 4, 2009, pp. 1-26
X.-C. Cai, S. Liu, J. Zhou, An overlapping domain decomposition method for parameter identification problems, Computational Science and Engineering, Springer, Vol. 60, 2008, pp. 451-458.


Ph.D., Applied Mathematics,
University of Colorado at Boulder, 2009

M.S., Applied Mathematics,
University of Colorado at Boulder, 2006

B.S., Mathematics,
Peking University, 2004

Memberships/Professional Affiliations