Sreekanth Pannala Oak Ridge National Laboratory
Senior Research Staff Member of the Computational
Engineering and Energy Sciences
of the Computer Science and Mathematics
Division of Oak Ridge National Laboratory
Overarching R&D
goal: Develop Multiscale/Multiphysics modeling and simulation tools for clean
energy
Recent Activities?
Multiphase Flow Modeling
Working closely with National Energy Technology Laboratory
(NETL - http://www.netl.doe.gov) in developing
an open-source multiphase flow software for needs in fossil and chemical
industry. For more information, please visit: http://mfix.netl.doe.gov. Co-edited a book
on “Computational
Gas-Solids Flows and Reacting Systems: Theory, Methods and Practice”
Predictive System Simulation Capability for Evaluating Safety and
Performance of Batteries
We are developing a predictive system-level (macroscopic) 3D
petascale simulation tool based on rigorous averaging procedures to model
batteries. This detailed simulation capability will model the coupled
multiphysics phenomena (charge and thermal transport; electrochemical
reactions; mechanical stresses) across the porous 3D structure of the
electrodes (cathodes and anodes) and the solid or liquid electrolyte system
while including the nanoscale effects through closures based on resolved
quantities. The simulation tool will be validated both at the full-cell level
as well as at the secondary particle-level and give an unprecedented capability
to study the interplay between the particle-scale effects to the overall
performance and the safety of the batteries. This tool fills a critical void in
the simulation space and gives a unique capability to model batteries.
Virtual Integrated Battery Environment (VIBE)
We
are developing a flexible and scalable computational framework that can
integrate multiple physics models at various scales (battery pack, cell,
electrodes, etc.) and provide a predictive modeling tool under the auspices of
the DOE EERE's CAEBAT (CAE for Batteries) program.
Catalytic Biomass
Pyrolysis
We
are developing unique computational tools for simulating catalytic pyrolysis of
woody biomass with sufficient chemistry, kinetics, and multi-phase
hydrodynamics to interpret laboratory and pilot-scale data and evaluate
potential barriers to commercial scale-up.
CASL (Consortium for
Advanced Simulations of Light Water Reactors)
I am
involved in the development of simulation capabilities for thermal-hydraulics
and FSI (fluid structure interaction) as part of this energy simulation hub.
Recent
Publications:
“High performance computing: clean coal gasifier
designs using hybrid parallelization,” with M. Syamlal, C. Guenther, and A.
Gel, Proceedings of Fluidization XIII, Gyeong-ju, Korea, 2010.
(http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=983571)
“Modeling and Simulation of Battery Systems,”
with Mukherjee, P. P. and J. Turner, chapter in Handbook of Battery Materials:
Editor C. Daniel. Weinheim, Wiley-VCH Verlag GmbH & Co. KGaA, 2010.
“High-Resolution Simulations of Coal Injection
in a Gasifier,” with Li, T., Gel, A., Syamlal, M., and Guenther, C. Industrial
& Engineering Chemistry Research, doi:10.1021/ie100519s, 2010.
“Open-source MFIX-DEM software for gas-solids
flows: Part I – Verification,” with R. Garg, J. E. Galvin, and T. Li, to be
submitted to Powder Technology for the special issue of multiphase flow science
workshop, September 2010.
“Open-source MFIX-DEM software for gas-solids
flows: Part II – Validation,” with T. Li, J. E. Galvin, and R. Garg, to be
submitted to Powder Technology for the special issue of multiphase flow science
workshop, September 2010.
“A generalized multi-dimensional mathematical
model for charging and discharging processes in a Supercapacitor”, with S. Allu,
B. Velamur Asokan and W. A. Shelton, to be submitted to Journal of
Electrochemical Society, October 2010.
“Multiphase continuum formulation for gas-solids
reacting flows,” with M. Syamlal, chapter in book titled “Computational
Gas-Solids Flows and Reacting Systems: Theory, Methods and Practice,” Editors:
S. Pannala, M. Syamlal and T. J. O’Brien, IGI Global, 2010 (Fall).
“Multiscale/Multiphysics Modeling of Biomass
Thermochemical Processes,” with G. Frantziskonis and S. Simunovic, Accepted
to ACS book on Computational Modeling of Lignocellulosic Biofuel Production, 2010.
“Modeling the coupling of reaction kinetics and
hydrodynamics in a collapsing cavity,” with S. K. Mishra, K. Muralidharan, P.
A. Deymier, G. Frantziskonis, and S. Simunovic, Ultrasonics Sonochemistry,
2010.
“Test Problem 4: 2009 Three-Dimensional
Assembly Simulations Report,” with E. Popov, R. Deiterding, and B.
Neykov, ORNL/TM-2009/246, November, 2009.
“Time-parallel multiscale/multiphysics
framework,” with G. Frantziskonis, K. Muralidharan, P. Deymier, S. Simunovic,
and P. Nukala, Journal of Computational Physics, 228, 8085–8092, 2009.
“Advanced Coal Gasifier Designs Using
Large-Scale Simulations,” Proceedings of the Scientific Discovery Through
Advanced Computing Conference, San Diego, CA, June 14-18, 2009, JP.
“Accelerating Clean Coal Gasifier Designs with
Hybrid MPI/OpenMP High Performance Computing,” with A. Gel, S. Pannala, R.
Sankaran, C. Guenther, M. Syamlal, and T. O'Brien, Proceedings of the Parallel
Computational Fluid Dynamics (ParCFD), May 18-22, Moffett Field, CA, USA, 2009.
“Modeling the Collisional-Plastic Stress
Transition for Bin Discharge of Granular Material,” with Sofiane Benyahia,
Charles E. A. Finney, Madhava Syamlal, Stuart C. Daw, and Thomas O'Brien,
Powders and Grains 2009: Proceedings of the 6th International Conference
on Micromechanics of Granular Media, Golden (Colorado), AIP.
“Silicon Chemical Vapor Deposition On Macro and
Submicron Powders in a Fluidized Bed,” with L. Cadoret, N. Reuge, M. Syamlal,
C. Rossignol, J. Dexpert-Ghys, C. Coufort, and B. Caussat, Powder Technology,
190, pp. 185-191, 2009.
“Wavelet-Based Spatial Scaling of Coupled
Reaction-Diffusion Fields” with S. K. Mishra, K. Muralidharan, P. A. Deymier,
G. Frantziskonis, and S. Simunovic, International Journal for Multiscale
Computational Engineering, Issue 6(4), p. 281-297, 2008.
“Multifluid Eulerian Modelling of Dense
Gas-Solid Fluidized Bed Hydrodynamics: Influence of the Dissipation
Parameters,” with N. Reuge, L. Cadoret, C. Coufort, M. Syamlal and B. Caussat, Chemical
Engineering Science, 63 (22), pp. 5540-5551, 2008.
“Parallel-in-Time Multiscale/Multiphysics
Framework,” with G. Frantziskonis, K. Muralidharan, P. Deymier, and S.
Simunovic, Proc. 3rd International Conference “From Scientific Computing to
Computational Engineering, 3rd IC-SCCE, Athens, 9-12 July, 2008, D.
Tsahalis, Ed., pp. 1-6.
“Wavelet Based Spatial Scaling of Coupled
Reaction Diffusion Fields,” with S. K. Mishra, K. Muralidharan, P. Deymier, G.
Frantziskonis, and S. Simunovic, Proceedings of the 2008 ICCS
conference, Lecture Notes in Computer Science, Springer.
“Filtered two-fluid models for fluidized
gas-particle suspensions,” with Yesim Igci, Arthur Andrews, Sankaran
Sundaresan, and Thomas O'Brien, AIChE Journal, 54(6), 1431-1448, 2008.
“Open-Source Software in Computational Research:
A Case Study,” with M. Syamlal, T. J. O’Brien, S. Benyahia, and A. Gel, Modelling
and Simulation in Engineering, Vol. 2008, 937542, 2008.
doi:10.1155/2008/937542.
“Spatiotemporal Compound Wavelet Matrix
Framework for Multiscale/Multiphysics Reactor Simulation: Case Study of a
Heterogeneous Reaction/Diffusion System,” with S. K. Mishra, K. Muralidharan,
S. Simunovic, C. S. Daw, P. Nukala, R. O. Fox, P. A. Deymier, and G.
Frantziskonis, International Journal of Chemical Reactor Engineering,
Vol. 6: A28, 2008. http://www.bepress.com/ijcre/vol6/A28.
“Dynamic compound wavelet matrix method for
multiphysics and multiscale problems”, with K. Muralidharan, S. K.
Mishra, G. Frantziskonis, P. A. Deymier, P. Nukala, and S. Simunovic, Phy.
Rev. E, E 77, 026714, 2008.
“Effects of using two- versus three-dimensional
computational modeling of fluidized beds: Part II, analysis,” with Nan Xie and
Francine Battaglia, Powder Technology, 182, 14–24, 2008.
“Effects of using two- versus three-dimensional
computational modeling of fluidized beds: Part I, hydrodynamics,” with Nan Xie
and Francine Battaglia, Powder Technology, 182, 1–13, 2008.
Link to CV for a detailed list.
Ways to Contact
Email: pannalas@ornl.gov
Phone: (865) 574-3129 or (865) 617-9612 (Cell
Phone)
Fax: (865) 241-4811
USMail:
Sreekanth Pannala
Computer Science and Mathematics Division
Oak Ridge National Laboratory
P.O.Box 2008, Bldg 5700
Oak Ridge, TN 37831-6164
For FEDEX: Use "One Bethel Valley Road" instead of "P.O. Box"