Publications

Peer-reviewed journals, proceedings, preprints, and selected presentations.

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Peer-Reviewed Journals

  1. Okafor, C., Seshadri, P.K., Roy, S., & Udaykumar, H.S. - High-Order Eulerian Sharp Interface Numerical Techniques for Computing Multi-Material Interaction Problems with an Arbitrary Number of Materials, Shock Waves (accepted, in production, 2025).
  2. Roy, S., Seshadri, P.K., Okafor, C., Johnson, B.P., & Udaykumar, H.S. - High-Fidelity Simulations of Shock Initiation of an Energetic Crystal-Binder System Due to Flyer Impact, Shock Waves (accepted, in production, 2025).
  3. Fang, I., Roy, S., Nguyen, P.C.H., Baek, S.S., Udaykumar, H.S. - Heterogeneous Energetic Material Damage Simulator (HEDS): A Deep Learning Approach to Simulate Damage-Sensitivity Linkages, APL Machine Learning 3(2), 2025.
  4. Roy, S., Johnson, B.P., Zhou, X., Nguyen, Y.T.H., Dlott, D.D., & Udaykumar, H.S. - Hot Spot Ignition and Growth from Tandem Micro-Scale Simulations and Experiments on Plastic-Bonded Explosives, Journal of Applied Physics 131(20), 2022.
  5. Roy, S., Sandhu, J.P.S., Ghosh, S. - Drag Reduction in Transonic Shock-Wave/Boundary-Layer Interaction Using Porous Medium: A Computational Study, Shock Waves 31(2), 117-132, 2021.
  6. Roy, S., Subramaniam, K., Ghosh, S. - Positioning of Normal Shock in a Novel Constant-Area Test Section: A Numerical Study, AIAA Journal 57(12), 5582-5587, 2019.
  7. Roy, S., Gopalapillai, R. - An Analytical Model for Asymmetric Mach Reflection Configuration in Steady Flows, Journal of Fluid Mechanics 863, 242-268, 2019.

Conference Proceedings

  1. Roy, S., Rajesh, G. - Analytical Prediction of Mach Stem Height for Asymmetric Wedge Reflection in 2-D Steady Flows, 31st International Symposium on Shock Waves 1, Springer, Cham, 2019.
  2. Sahoo, A., Roy, S., Ghosh, S. - Numerical Investigation of Transonic Flow over Porous Medium Using Immersed Boundary Method, 2018 Applied Aerodynamics Conference, AIAA 2018-3339, 2018.
  3. Roy, S., Subramaniam, K., Ghosh, S. - Passive control of normal-shock-wave/boundary-layer interaction using porous medium: computational study, 35th AIAA Applied Aerodynamics Conference, AIAA 2017-3912, 2017.
  4. Sahoo, A., Ghosh, S., & Roy, S. - Transonic flow past a porous medium: effect of porosity, AIAA Aviation 2019 Forum, AIAA 2019-3076, 2019.

Preprint

  1. Beerman, J.T., Roy, S., Udaykumar, H.S., Baek, S.S. - Size is Not the Solution: Deformable Convolutions for Effective Physics-Aware Deep Learning, arXiv (2026).

Selected Presentations

  • Roy, S., Seshadri, P.K., Fang, I., Fuhrmeister, J., & Udaykumar, H.S. - SCIMITAR3D-V2.0: A versatile high-order accurate sharp-interface framework for compressible multi-material reactive simulations of heterogeneous energetic materials, APS SCCM 2025.
  • Roy, S., Nguyen, Y.T., Udaykumar, H.S. - Micro-detonation: can rapid reaction waves result from void-void interactions in shocked energetic crystals?, APS SCCM 2025.
  • Fang, I., Roy, S., Baek, S.S., Udaykumar, H.S. - Heterogeneous energetic damage simulator (HEDS): Deep Learning for Synthetic PBX Microstructures with Controlled Damage and Porosity, APS SCCM 2025.
  • Roy, S., Okafor, C., Seshadri, P.K., & Udaykumar, H.S. - High-fidelity mesoscale calculations of shock initiation in HMX-based PBXs, Energetic Materials, Gordon Research Conference, 2024.

For the complete presentation list, see the downloadable resume.