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.

Opportunities and news:

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):

  •  Nan Li, Canan Uckun, Emil M. Constantinescu, John Birge, Kory W. Hedman, and Audun Botterud "Flexible operation of batteries in power system scheduling with renewable energy." IEEE Transactions on Sustainable Energy, To appear, 2015.


  • Debojyoti Ghosh* and Emil M. Constantinescu, "Semi-implicit time integration of atmospheric flows with characteristic-based flux partitioning." SIAM Journal on Scientific Computing (SISC), Submitted, 2015. [Preprint # ANL/MCS-P5417-1015].


  •  Shrirang Abhyankar, Emil M. Constantinescu, Barry Smith, Alexander J. Flueck, and Daniel A. Maldonado "Acceleration of dynamic simulations using parallel Newton-GMRES-Schwarz methods." IEEE Transactions on Smart Grid Special Issue on High Performance Computing (HPC) Applications for a More Resilient and Efficient Power Grid, Submitted, 2015.


  • Peng Wang, David Barajas-Solano, Emil Constantinescu, Shrirang S. Abhyankar, Debojyoti Ghosh*, Barry Smith, Zhenyu Huang, and Alexandre Tartakovsky, "Probabilistic density function method for stochastic ODEs of power systems with uncertain power input"; SIAM/ASA Journal on Uncertainty Quantification (JUQ), Vol. 3(1), Pages 873-896, 2015.


  • Debojyoti Ghosh* and Emil M. Constantinescu, "A well-balanced conservative finite-difference algorithm for atmospheric flows." AAIA Journal, Accepted, 2015. [Preprint # ANL/MCS-P5371-0615].


  • Franck Cappello, Emil Constantinescu, Paul Hovland, Tom Peterka, Carolyn Phillips, Marc Snir, Stefan Wild, Improving the Trust in Results of Numerical Simulations and Scientific Data Analytics,” MCS Report, ANL/MCS-TM-352, Published Online April 2015.


  • Ilias Bilionis*, Beth A. Drewniak, and Emil M. Constantinescu, "Crop physiology calibration in the CLM." Vol 8(4), Pages 1071-1083, Geoscientific Model Development, 2015.


  • 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), Vol. 37(3), Pages C354-C383, 2015. -> Technical report version.


  • {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.


  • 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.", Mathematics of Computation, Submitted, 2015. [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.





Zheng Zhang (2015-, UQ)
Hong Zhang (2014-, Sensitivity analysis - PETSc)
Julie Bessac (2014-, Data analysis, Statistics)


Debojyoti Ghosh (2013-2015, Time stepping, CFD - PETSc)
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)

Grad students in practicum:

Ahmed Attia (2015, graduate, Computer Science, Virginia Tech)
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 October 2015