Roman Samulyak

Professor Department of Applied Mathematics and Statistics Stony Brook University Stony Brook, NY 11794-3600 Office: Room 1-108, Math Tower Tel: (631) 632-8353        Fax: (631) 632-8490 Email: roman.samulyak@stonybrook.edu

Scientist Computational Science Center Brookhaven National Laboratory Upton, NY 11973 Office: Room 455-D, Building 463B Tel: (631) 344 3304        Fax: (631) 344 5751 Email: rosamu@bnl.gov

Research

Roman Samulyak holds a joint appointment at the AMS Department, Stony Brook University and Computational Science Center, Brookhaven National Laboratory. His research interests include mathematical modeling and numerical algorithms for coupled systems of PDE equations for multiphase systems and applications to the simulations of  physics processes in particle accelerators, nuclear fusion and fission devices, and atmospheric / climate systems. He has developed models and numerical algorithms for multiphase hydro and magneto-hydrodynamic flows with phase transitions, electromagnetic systems etc. using methods of front tracking and imbedded boundaries. His latest research interests include mesoscale models for brittle fracture and smooth Lagrangian particles methods for hydro and MHD problems.

Current research projects:

• Simulation of pellet ablation in tokamaks within SciDAC Center for Tokamak Transient Simulations
• Laser-matter interaction and laser-induced plasma wakefield acceleration of particle beams
  
• PLX-Alpha: Computational Evaluation of Alternative Concepts for Nuclear Fusion
  
• Novel Particle and Hybrid Methods for Complex Systems
  
• Simulation Studies of Novel Methods for Cooling of Relativistic Particle Beams
  

Teaching

Fall 2020	AMS 501: Ordinary Differential Equations, Advanced Topics
Spring 2019	AMS 528: Numerical Analysis III. Numerical Analysis of PDE's

Curriculum Vitae:

Selected Recent Publications

This is a list of recent representative publications. Click on my CV for a more complete list of publications.

• R. Samulyak, X. Wang, H.-S. Chen, Lagrangian Particle Method for Compressible Fluid Dynamics, J. Comput. Phys., 362 (2018),  1-19.
• K. Yu, R. Samulyak, K. Yonehara, B. Freemire, Simulation of plasma loading of high-pressure RF cavities, JINST, 13 (2018), P01008.
• P. Kumar, K. Yu, R. Samulyak, Influence of Ionization and Beam Quality on Interaction of TW-Peak CO2 Laser With Hydrogen Plasma, IPAC, 2018, paper TUPML015.
  
• K. Yu, R. Samulyak, K. Yonehara, B. Freemire, Simulation of beam-induced plasma in gas-filled RF cavities, Phys. Rev. Accel. and Beams, 20 (2017), 032002.
• S. C. Hsu, et al., Experiment to Form and Characterize a Section of a Spherically Imploding Plasma Liner, IEEE Trans. Plasma Sci., 2018.
  
• X. Wang, R. Samulyak, J. Jiao, K. Yu, Adaptive Particle-in-Cloud method for optimal solutions to Vlasov-Poisson equation, J. Comput. Phys., 316 (2016), 682 - 699.
• R. Samulyak, H.-C. Chen, K. Yu, Second Order Upwind Lagrangian Particle Method for Euler Equations, Procedia Comp. Sci., 80 (2016), 2433 - 2437.
• W. Li, T. Delaney, X. Jiao, R. Samulyak, C. Lu, Finite Element Model for Brittle Fracture and Fragmentation, Procedia Comp. Sci., 80 (2016), Pages 245 - 256
• J. Ma, G. Wang, X. Wang, R. Samulyak, V. N. Litvinenko, K. Yu, Modulator simulations for coherent electron cooling, Proceedings of NA-PAC 2016, paper WEPOA55.
  
• V. Litvinenko, Y. Jing, I. Pinayev, G. Wang, R. Samulyak, D. Ratner, Testing aspects of advanced coherent electron cooling technique, 2015, Technical Report BNL-108153-2015-CP.5.
  
• K. Yu, R. Samulyak, M. Chung, A. Tollestrup, K. Yonehara, B. Freemire, Simulation studies of beam-induced plasma loading of high-pressure RF cavities, 2016, Phys. Rev. Accel. and Beams, to appear.
  
• K. Yu, R. Samulyak, SPACE Code for Beam-Plasma Interaction, IPAC-2015, 6th International Particle Accelerator Conference, May 3-8, 2015, Richmond, VA. Paper MOPMN016.
  
• E. Feinberg, M. Li, R. Samulyak, B. Fardanesh, G. Stefopoulos, Sensor Placement for Real-Time Power Flow Calculations in Transmission Networks, ENERGY 2015 : The Fifth International Conference on Smart Grids, Green Communications and IT Energy-aware Technologies, ISBN: 978-1-61208-406-0.
• H. Wei, R. Samulyak, Mass-conservative network model for brittle fracture, J. Coupled Syst. Multiscale Dyn., Vol. 2 (2014), No 2, p. 2330.
• T. Guo, S. Wang, R. Samulyak, Sharp interface algorithm for large density ratio incompressible multiphase magnetohydrodynamic flows, Procedia Comp. Science, 18 (2013), 511 - 520.
• S.Wang, J. Glimm, R. Samulyak, X. Jiao, Embedded boundary method for two-phase incompressible flow, 2013. available at arxiv.org
• H. Kim, L. Zhang, R. Samulyak, P.Parks, On the structure of plasma liners for plasma jet induced magnetoinertial fusion, Phys. Plasmas 20, 022704 (2013)
• H. Kim, R. Samulyak, L. Zhang, P. Parks, Influence of atomic processes on the implosion of plasma liners, Physics of Plasmas, 9:0827111, 2012.
• T. Kaman, H. Lim, Y. Yu, D. Wang, Y. Hu, J.-D. Kim, L. Wu, J. Glimm, X. Jiao, X.-L. Li, and R. Samulyak, A numerical method for the simulation of turbulent mixing and its basis in mathematical
  theory. Book chapter in: Lecture Notes on Numerical Methods for Hyperbolic Equations: Short Course Book, CRC Press, Balkema London, 2011.
• R. J. Abrams et. al., International design study for the Neutrino Factory, interim design report, 2011. BNL-96453-2011; CERN-ATS-2011-216
• R. Samulyak, P. Parks, L. Wu, Spherically symmetric study of plasma liner implosion for magnetized target fusion, Physics of Plasmas, 17 (2010), 092702.
• R. Samulyak, W. Bo, X. Li, H. Kirk, K. McDonald, Computational algorithms for multiphase magnetohydrodynamics and applications, Condensed Matter Physics, 13 (2010), No 4, 43402: 1 - 12.
• S. Wang, R. Samulyak, T. Guo, An embedded boundary method for parabolic problems with interfaces and application to multi-material systems with phase transitions, Acta Mathematica Scientia, 30 B (2010),  No. 2, 499 - 521.
• P. Parks, T. Lu, R. Samulyak, Charging and E x B rotation of ablation clouds surrounding refueling pellets in hot fusion plasmas, Physics of Plasmas, 16, 060705 (2009).
  
• Z. L. Xu, T. Lu, R. Samulyak, J. Glimm, X. M. Ji, Dynamic phase boundaries for compressible fluids, SIAM J. Sci. Computing, 30 (2008), No. 2, 895 - 915.
• J. Du, T. Lu, R. Samulyak, Algorithms for magnetohydrodynamics of ablated materials, Journal of Nanoscience and Nanotechnology,  8 (2008), 3674 -- 3685.
• R. Samulyak, T. Lu, P. Parks, Simulation of pellet ablation for tokamak fuelling with ITAPS front tracking, Journal of Physics: Conf. Series, (2008), 012081.
  
• R. Samulyak, T. Lu, P. Parks, A magnetohydrodynamic simulation of pellet ablation in the electrostatic approximation, Nuclear Fusion, 47 (2007), 103-118.
• R. Samulyak, J. Du, J. Glimm, Z. Xu,A numerical algorithm for MHD of free surface flows at low magnetic Reynolds numbers, J. Comp. Phys., 226 (2007), 1532 - 1549.
• T. Lu, R. Samulyak, J. Glimm, Direct numerical simulation of bubbly flows and its application, J. Fluid Eng., 129 (2007), 595 - 604.