Picture of Emil Constantinescu

Emil Constantinescu
Office #: 2151

Computational Mathematician
Mathematics and Computer Science
Argonne National Laboratory

Fellow of the Computation Institute
University of Chicago



- Time stepping
- Uncertainty
ANL Stuff

I am a Computational Mathematician in the Laboratory for Advanced Numerical Simulations at Argonne National Laboratory & fellow of the Computation Institute, The University of Chicago. Previously, I was the Wilkinson Fellow in the Mathematics and Computer Science Division, Argonne National Laboratory. I hold a PhD in Computer Science (2008) from Virginia Tech (old research highlight).

I am a member of:

  • SIAM SISC associate editorial board.
  • STATMOS: Research Network for Statistical Methods for Atmospheric and Oceanic Sciences.


Research Interests:

Time-stepping for PDEs and ODEs
Multirate - GLM - IMEX
Implementation in PETSc library

Uncertainty Quantification,
Data Assimilation & Sensitivity Analysis

Modeling and Simulation
Multirate &IMEX
Forecast page


Scalable Implicit-Explicit (IMEX) Algorithms and Software for Time-Dependent Multimodel PDEs

Quantifying Global Structural Errors in Predictive Scientific Simulations

Watt-sun: A Multi-scale, Multi-Model, Machine-Learning Solar Forecasting Technology
Efficient High-Order Time-Integrators for Local High-Order Discretization Methods Climate Science for a Sustainable Energy Future: Crop Model in the Earth System Model High Fidelity "Faster Than Real-Time" Simulator for Predicting Power System Dynamic Behavior
Multifaceted Mathematics for Complex Energy Systems (M2ACS) Cloud processes in global climate models
Grid Level Energy Storage for Integration of Renewable Energy

Recent papers (see all):

  • {WEB}Ilias Bilionis*, Emil M. Constantinescu, and Mihai Anitescu, "Data-driven model for solar irradiation based on satellite observations." Vol 110, Pages 22-38, Solar Energy, 2014.


  • Debojyoti Ghosh* and Emil M. Constantinescu, "Nonlinear compact finite-difference schemes with semi-implicit time stepping." LCNS, Submitted, 2014.


  • Ilias Bilionis*, Beth A. Drewniak, and Emil M. Constantinescu, "Crop physiology calibration in CLM." Geoscientific Model Development, submitted; Preprint # ANL/MCS-P5150-0614, 2014.


  • Debojyoti Ghosh*, Emil M. Constantinescu, and Jed Brown, "Efficient implementation of non-linear compact schemes on massively-parallel platforms." SIAM Journal on Scientific Computing (SISC), Submitted, 2014. -> Technical report version.


  • Mihai Anitescu, Xiaoyan Zeng*, and Emil M. Constantinescu, "A low-memory approach for best-state estimation of hidden Markov models with model error." SIAM Journal on Numerical Analysis (SINUM), Vol. 52(1), Pages 468-495, 2014.


  • Emil Constantinescu, "Estimating Global Errors in Time Stepping.", SIAM Journal on Numerical Analysis (SINUM), Submitted, 2014. [Preprint # ANL/MCS-P5077-0214]


  • Shrirang Abhyankar*, Barry Smith, and Emil M. Constantinescu, "Evaluation of overlapping restricted additive Schwarz preconditioning for parallel solution of very large power flow problems." Proceedings of the 3rd International Workshop on High Performance Computing, Networking and Analytics for the Power Grid, pp 5:1-5:8, 2013.


  • Francis X Giraldo, James F. Kelly, and Emil Constantinescu, "Implicit-explicit formulations of a three-dimensional nonhydrostatic unified model of the atmosphere (NUMA)." SIAM Journal on Scientific Computing (SISC), Vol 35(5), pp B1162-B1194, 2013. [Preprint # ANL/MCS-P2083-0512]


  • Juan M. Salazar, Urmila Diwekar, Emil M. Constantinescu, and Victor Zavala, "Stochastic Optimization Approach to Water Management in Cooling-Constrained Power Plants." Applied Energy, Vol 112, pp 12-22, 2013.


  • Emil M. Constantinescu and Adrian Sandu, "Extrapolated multirate methods for differential equations with multiple time scales." Journal of Scientific Computing, Vol. 56(1), pp 28-44, 2013.


  • Emil M. Constantinescu and Mihai Anitescu, "Physics-based covariance models for Gaussian processes with multiple outputs." International Journal for Uncertainty Quantification,Vol. 3(1), pp 47-71, 2013.


  • Xiaoyan Zeng*, Beth A. Drewniak, and Emil M. Constantinescu, "Calibration of the crop model in the Community Land Model." Vol. 6(1), Pages 379-398, Geoscientific Model Development, submitted; Preprint # ANL/MCS-P3054-1112, 2013.


  • David E. Keyes, Lois Curfman McInnes, Carol Woodward, William Gropp, Eric Myra, Michael Pernice, John Bell, Jed Brown, Alain Clo, Jeffrey Connors, Emil Constantinescu, Don Estep, Kate Evans, Charbel Farhat, Ammar Hakim, Glenn Hammond, Glen Hansen, Judith Hill, Tobin Isaac, Xiaomin Jiao, Kirk Jordan, Dinesh Kaushik, Efthimios Kaxiras, Alice Koniges, Kihwan Lee, Aaron Lott, Qiming Lu, John Magerlein, Reed Maxwell, Michael McCourt, Miriam Mehl, Roger Pawlowski, Amanda Peters Randles, Daniel Reynolds, Beatrice Rivière, Ulrich Rüde, Tim Scheibe, John Shadid, Brendan Sheehan, Mark Shephard, Andrew Siegel, Barry Smith, Xianzhu Tang, Cian Wilson, and Barbara Wohlmuth "Multiphysics Simulations: Challenges and Opportunities." International Journal of High Performance Computing Applications, 27(1): 4-83, 2013. -->> Tech report version, ICiS Multiphysics 2011 Workshop Report, Park City, Utah, July 30 - August 6, 2012.


  • Ricardo J. Bessa, Vladimiro Miranda, Audun Botterud, Jianhui Wang, and Emil Constantinescu, "Time Adaptive Conditional Kernel Density Estimation for Wind Power Forecasting." IEEE Transactions on Sustainable Energy (Special Wind Energy issue), Vol. 3(4), Pages 660-669, 2012.


  • Barry Smith, Lois Curfman McInnes, Emil Constantinescu, Mark Adams, Satish Balay, Jed Brown, Matthew Knepley, and Hong Zhang, "PETSc's Software Strategy for the Design Space of Composable Extreme-Scale Solvers." (Preprint # ANL/MCS-P2059-0312) DOE Exascale Research Conference, April 16-18, 2012, Portland, OR, 2012.




Debojyoti Ghosh (2013-, Time stepping, CFD - PETSc)
Hong Zhang (2014-, Sensitivity analysis - PETSc)
Julie Bessac (2014-, Data analysis, Statistics)


Ilias Bilionis (2013-2014, Uncertainty Quantification)
Xiaoyan Zeng (2012, UQ - UQ for the crop model in the CESM - community Earth system model)
Shrirang Abhyankar (2012-2014, Time stepping and power grid applications - PETSc)

Students practicum:

Hong Zhang (2012, graduate, Computer Science, Virginia Tech)
Alexandru Cioaca (2010, 2011, graduate, Computer Science, Virginia Tech)
Jeffrey Steward (2010, graduate, Mathematics, Florida State University)
Matthew Rocklin (2009, graduate, Computer Science, University of Chicago)


updated January 2015