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Revathi Jambunathan

Revathi Jambunathan
Research Scientist
Fax: +1 510 486 6900

Affiliation and Research Interests

I am a Research Scientist in the Center for Computational Sciences and Engineering at the Lawrence Berkeley National Laboratory. My research interest is in computational electrodynamics. I contribute to the development of the WarpX, which is an electromagnetic particle-in-cell code primarily used for simulations of advanced plasma wake-field accelerators using advanced algorithms. More information on the WarpX software can be found here

My primary objective is to develop efficient diagnostics and core algorithms in WarpX. I am also collaborating with other members of CCSE and the WarpX team to leverage the AMR capability of WarpX for modeling plasma processes in the astrophysical context. Additionally, I am extending the Maxwell solver in WarpX to model quantum chips using a classical approach. More information on the research projects in the area of computational electrodynamics can be found here


  • R. Jambunathan, and D. Levin, "Kinetic, three-dimensional, PIC-DSMC simulations of ion thruster plumes and the backflow region, Part 1: A colocated ion-electron source", submitted to IEEE Transactions on Plasma Science, (under review).
  • R. Jambunathan, D. Levin, A. Borner, JC. Ferguson, and F. Panerai, "Prediction of gas transport properties through fibrous carbon preform microstructures using direct simulation Monte Carlo", International Journal of Heat and Mass Transfer, 2019. [doi]
  • R. Jambunathan and D. Levin, "CHAOS: An octree-based PIC-DSMC code for modeling of electron kinetic properties in a plasma plume using MPI-CUDA parallelization", Journal of Computational Physics, 2018. [doi]
  • R. Jambunathan and D. Levin, "Advanced parallelization strategies using hybrid MPI-CUDA octree DSMC method for modeling flow through porous media", Computers & Fluids, 2017. [doi]
  • R. Jambunathan and D. Levin, "Grid-free octree approach for modeling heat transfer to complex geometries", Journal of Thermophysics and Heat Transfer, 2016. [doi]

Conference Paper-Presentations

  • Comparison of plasma plume characteristics obtained using PIC-DSMC approach with Boltzmann approximations, International Conference On Plasma Science, (ICOPS) , Denver, Colorado, June-2018.
  • A new self-consistent boundary condition for modeling of plasma plume evolution using a fully-kinetic PIC approach, International Conference On Plasma Science, (ICOPS) , Denver, Colorado, June-2018.
  • Multi-GPU PIC solver for modeling of ion thruster plasma plumes, AIAA SciTech Conference , Kissimmee, Florida, January-2018.
  • Prediction of thermal protection system material permeability and hydraulic tortuosity factor using DSMC, AIAA SciTech Conference , Kissimmee, Florida, January-2018.
  • Kinetic modeling of plasma plumes using multi-GPU forest-of-octree approach, 35th International Electric Propulsion Conference , Atlanta, Georgia, October 2017.
  • Characterization of thermal protection system materials using CHAOS DSMC solver, 9th Ablation Workshop, Bozeman, Montana, August 2017.
  • Forest of octree DSMC simulation of flow through porous media, 30th International Symposium on Rarefied Gas Dynamics, August 2016.
  • A hybrid CPU-GPU Parallel octree-based Direct Simulation Monte Carlo Approach, Joint Thermophysics and Heat Transfer Conference, Dallas, Texas, June 2015.
  • Gridless DSMC approach for analysis of fractal-like spherical aggregates, Joint Thermophysics and Heat Transfer Conference, Atlanta, Georgia, June 2014.

Conference Posters

  • Ion thruster plasma plume simulations using CHAOC PIC-DSMC, SIAM CSE-2019 , Spokane, Washington, February 2019 (Best Poster Award).

Journal Articles

R. Jambunathan, Z. Yao, R. Lombardini, A. Rodriguez, and A. Nonaka, "Two-Fluid Physical Modeling of Superconducting Resonators in the ARTEMIS Framework", Computer Physics Communications, October 2, 2023, 291:108836,

P. Kumar, A. Nonaka, R. Jambunathan, G. Pahwa, S. Salahuddin, and Z. Yao, "FerroX: A GPU-accelerated, 3D Phase-Field Simulation Framework for Modeling Ferroelectric Devices", Computer Physics Communications, September 1, 2023, 290:108757,

H. Klion, R. Jambunathan, M. E. Rowan, E. Yang, D. Willcox, J.-L. Vay, R. Lehe, A. Myers, A. Huebl, W. Zhang, "Particle-in-Cell Simulations of Relativistic Magnetic Reconnection with Advanced Maxwell Solver Algorithms", The Astrophysical Journal, July 13, 2023, 952,

S. S. Sawant, Z. Yao, R. Jambunathan, A. Nonaka, "Characterization of Transmission Lines in Microelectronic Circuits Using the ARTEMIS Solver", IEEE Journal on Multiscale and Multiphysics Computational Techniques, December 12, 2022, 8:31-39,

Z. Yao, R. Jambunathan, Y. Zeng, and A. Nonaka, "A Massively Parallel Time-Domain Coupled Electrodynamics-Micromagnetics Solver", International Journal of High Performance Computing Applications, January 10, 2022, accepted,

Revathi Jambunathan, Deborah Levin, "A Self-Consistent Open Boundary Condition for Fully Kinetic Plasma Thruster Plume Simulations", IEEE Transactions on Plasma Science, February 7, 2020, doi: 10.1109/TPS.2020.2968887

Revathi Jambunathan, Deborah Levin, "Kinetic, three-dimensional, PIC-DSMC simulations of ion thruster plumes and the backflow region, Part 1: A colocated ion-electron source", (under review), May 20, 2019,


Revathi Jambunathan, Andrew Myers, Donald Willcox, Jean-Luc Vay, Ann Almgren, Diana Amorim, John Bell, Kevin Gott, Axel Huebl, Remi Lehe, Micahel Rowan, Olga Shapoval, Maxence Thevenet, Weiqun Zhang, "WarpX: Towards exascale modeling of pulsar magnetospheres", Connecting Micro and Macro Scales: Acceleration, Reconnection, and Dissipation in Astrophysical Plasmas, September 9, 2019,