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PUBLICATIONS

archival journal publications

  1. Swaminathan-Gopalan, K., Zhu, T., Ertekin, E., & Stephani, K. A. (2017). Structural and thermal effects of ion-irradiation induced defect configurations in silicon. Phys. Rev. B 95, 184109. 
  2. Swaminathan-Gopalan, K., Subramaniam, S., & Stephani, K. A. (2016). Generalized Chapman-Enskog continuum breakdown parameters for chemically reacting flows. Phys. Rev. Fluids 1, 083402. 
  3. Stephani, K. A., & Boyd, I. D. (2016). Spacecraft plume interactions with the magnetosphere plasma environment in geostationary Earth orbit. Journal of Geophysical Research: Space Physics.
  4. Swaminathan-Gopalan, K., & Stephani, K. A. (2016). Recommended direct simulation Monte Carlo collision model parameters for modeling ionized air transport processes. Physics of Fluids (1994-present), 28(2), 027101.
  5. Stephani, K. A., & Boyd, I. D. (2015). Molecular dynamics modeling of defect formation in many-layer hexagonal boron nitride. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 365, 235-239.
  6. Stephani, K. A., Boyd, I. D., Balthazor, R. L., McHarg, M. G., Mueller, B. A., & Adams, R. J. (2014). Analysis and observation of spacecraft plume/ionosphere interactions during maneuvers of the space shuttle. Journal of Geophysical Research: Space Physics, 119(9), 7636-7648.
  7. Stephani, K. A., & Boyd, I. D. (2014). Detailed modeling and analysis of spacecraft plume/ionosphere interactions in low Earth orbit. Journal of Geophysical Research: Space Physics, 119(3), 2101-2116.
  8. Stephani, K. A., Goldstein, D. B., & Varghese, P. L. (2013). A non-equilibrium surface reservoir approach for hybrid DSMC/Navier–Stokes particle generation. Journal of Computational Physics, 232(1), 468-481.
  9. Stephani, K. A., Goldstein, D. B., & Varghese, P. L. (2012). Consistent treatment of transport properties for five-species air direct simulation Monte Carlo/Navier-Stokes applications. Physics of Fluids (1994-present), 24(7), 077101.
  10. Stephani, K. A., & Goldstein, D. B. (2010). An examination of trapped bubbles for viscous drag reduction on submerged surfaces. Journal of Fluids Engineering, 132(4), 041303.
archival journal
  1. G. Groskopf, M. J. Kloker, K. A. Stephani, O. Marxen and G. Iaccarino, "Hypersonic  flows with discrete surface roughness and their stability properties," Proceedings of the 2010 CTR Summer Program, Center for Turbulence Research, Stanford University, Stanford, CA 2010.

in proceedings (peer reviewed)

in proceedings
  1. T. J. Wilson, T.-J. Pan and K. A. Stephani, "State-to-State dissociation and recombination modeling in DSMC using quasi-classical trajectory calculations for O+O2," AIAA-2018-1487, 2018 AIAA Aerospace Sciences Meeting, January 8-12, Kissimmee, FL 2018. 
  2. S. Subramaniam and K. A. Stephani, "Characterization of state-resolved transport for O+O2 collisions," AIAA-2018-1484, 2018 AIAA Aerospace Sciences Meeting, January 8-12, Kissimmee, FL 2018. 
  3. K. Swaminathan-Gopalan, A. Borner and K. A. Stephani, "Development of a detailed surface chemistry framework in DSMC," AIAA-2018-0494, 2018 AIAA Aerospace Sciences Meeting, January 8-12, Kissimmee, FL 2018. 
  4. K. Swaminathan-Gopalan, A. Borner, K. A. Stephani, V. J. Murray, S. Poovathingal, T. K. Minton and N. N. Mansour, "Development of DSMC Surface Oxidation Model for Carbon from Analysis of Molecular Beam Experiments," Presented at the 9th Ablation workshop, Aug. 30 - Sep. 1,  Bozeman, MT 2017.
  5. A. Borner, K. Swaminathan-Gopalan,  K. A. Stephani, V. J. Murray, S. J. Poovathingal, T. K. Minton, F. Panerai and N. N. Mansour, "Investigation of the High-Energy Oxidation of FiberForm from DSMC Analysis of Molecular Beam Experiments," Presented as a poster at the 9th Ablation workshop, Aug. 30 - Sep. 1, Bozeman, MT 2017.
  6. K. Swaminathan-Gopalan, A. Borner and K. A. Stephani, "Development of a detailed surface chemistry framework in DSMC," Presented at Direct Simulation Monte Carlo : Theory, Methods and Applications Meeting, Aug. 27-30, Santa Fe, NM 2017.
  7. K. Swaminathan-Gopalan and K. A. Stephani, "Construction of finite rate surface chemistry models from molecular beam experimental data," AIAA-2017-4347, 47th AIAA Thermophysics Meeting, June 5-9, Denver, CO 2017.
  8. S. Subramaniam and K. A. Stephani, "Influence of surface chemistry on continuum breakdown in high-speed chemically reacting flows," AIAA-2017-4343, 47th AIAA Thermophysics Meeting, June 5-9, Denver, CO 2017. 
  9. T.-J. Pan and K. A. Stephani, "Investigation of a coupled approach of DSMC and BGK methods for tail-driven processes," AIAA-2017-4023, 47th AIAA Thermophysics Meeting, June 5-9, Denver, CO 2017. 
  10. A. Borner, K. Swaminathan-Gopalan,  K. A. Stephani, V. J. Murray, S. J. Poovathingal, T. K. Minton, F. Panerai and N. N. Mansour, "DSMC analysis of molecular beam experiments on light-weight carbon preform ablators," AIAA-2017-3687, 47th AIAA Thermophysics Meeting, June 5-9, Denver, CO 2017. 
  11. K. Swaminathan-Gopalan, A. Borner, K. A. Stephani, V. J. Murray, S. Poovathingal, T. K. Minton and N. N. Mansour, "DSMC analysis of molecular beam experiments for oxidation of carbon based ablators," AIAA-2017-1845, 55th AIAA Aerospace Sciences Meeting, January 9-13, Grapevine, TX 2017. 
  12. A. Borner, K. Swaminathan-Gopalan, K. A. Stephani and N. N. Mansour, "Implementation of an oxidation surface chemistry model in DSMC based on molecular beam experiments," Presented at the 8th Ablation Workshop, Oct. 5-6, Tuscon, AZ 2016.
  13. A. Borner, K. Swaminathan-Gopalan, K. A. Stephani and N. N. Mansour, "Detailed DSMC surface chemistry modeling of the oxidation of carbon-based ablators," 30th International Symposium on Rarefied Gas Dynamics, July 10-15, Victoria BC, Canada 2016.
  14. T.-J. Pan and K. A. Stephani, "Investigation of velocity-space coupling approach in DSMC for tail-driven processes," 30th International Symposium on Rarefied Gas Dynamics, July 10-15, Victoria BC, Canada 2016. 
  15. S. Subramaniam, K. Swaminathan-Gopalan and K. A. Stephani, "Assessment of continuum breakdown for high-speed chemically reacting wake flows," AIAA-2016-4344, 46th AIAA Thermophysics Conference, June 13-17, Washington, D.C 2016. 
  16. T. J. Wilson and K. A. Stephani, "State-to-state vibrational energy modeling in DSMC using quasiclassical trajectory calculations for O + O2," AIAA-2016-3839, 46th AIAA Thermophysics Conference, June 13-17, Washington, D.C 2016.
  17. K. A. Stephani (Invited), "Assessment of continuum breakdown in multi-scale, multi-physics flows from generalized Chapman-Enskog theory," NSF Ki-Net Young Researchers Workshop: Kinetic theory with applications in physical sciences, Center for Scientific Computation and Mathematical Modeling (CSCAMM), University of Maryland, College Park, 2015.
  18. K. A. Stephani (Invited), "Fundamental transport mechanisms in high-altitude non-equilibrium flows: new perspectives from kinetic methods and theory," William Maxwell Reed Seminar Series, Department of Mechanical Engineering, University of Kentucky, 2015.
  19. K. A. Stephani (Invited), "Assessment of continuum breakdown in high-speed chemically reacting flows," Presented at Direct Simulation Monte Carlo : Theory, Methods and Applications Meeting (hosted by Sandia National Labs/DOE), Kauai, HI 2015.
  20. K. Swaminathan-Gopalan and K. A. Stephani, "Calibration of DSMC parameters for transport processes in ionized air mixtures,"  AIAA-2015-3373, 45th AIAA Thermophysics Conference, June 22-26, Dallas, TX 2015.
  21. K. A. Stephani and I. D. Boyd, "Dynamics of Spacecraft Plume/Magnetosphere Interactions in Geostationary Earth Orbit," AIAA-2015-1396, 53rd Aerospace Sciences Meeting, January 4-11, 2015.
  22. K. A. Stephani and I. D. Boyd, "Molecular dynamics modeling of defect formation and lattice thermal conductivity in multilayer hexagonal boron nitride," 29th International Symposium on Rarefied Gas Dynamics, July 14-18, Xi'an, China 2014.
  23. K. A. Stephani (Invited), "Predictive Models for Non-equilibrium Plasmas and their Interaction with Engineering Materials," TSA Branch Division Seminar, NASA Ames, July 11, Moffett Field, CA 2014.
  24. K. A. Stephani (Invited), "Enabling the Predictive Modeling of Non-Equilibrium Plasmas and their Interaction with Engineering Materials," MechSE Departmental Seminar, Department of Mechanical Science and Engineering, University of Illinois Urbana-Champaign, February 2014.
  25. K. A. Stephani and I.D. Boyd, "Detailed Modeling and Analysis of Spacecraft Plume/Ionosphere Interactions in Low Earth Orbit," AIAA-2013-2680, 5th AIAA Atmospheric and Space Environments Conference, June 24-27, San Diego, CA 2013.
  26. K. A. Stephani, P. L. Varghese and D.B. Goldstein, "Hybrid DSMC/CFD Solution of Hypersonic Boundary Layer Flow over Discrete Surface Roughness," Presented at 28th International Symposium on Rarefied Gas Dynamics, July 9-13, Zaragosa, Spain 2012.
  27. K. A. Stephani (Invited), "Development of a Hybrid DSMC/CFD Method for Hypersonic Boundary Layer Flow over Discrete Surface Roughness," NGPDL Seminar, Department of Aerospace Engineering, University of Michigan, April 2012.
  28. K. A. Stephani, D. B. Goldstein and P. L. Varghese, "Generation of a Hybrid DSMC/CFD Solution for Gas Mixtures with Internal Degrees of Freedom," AIAA-2012-0648, 50th AIAA Aerospace Sciences Meeting, January 9-12, Nashville, TN 2012.
  29. K. A. Stephani, D. B. Goldstein and P. L. Varghese, "Development of a Hybrid DSMC/Navier-Stokes Solver for Boundary Layer Flow Involving Polyatomic Gas Mixtures," Presented at Direct Simulation Monte Carlo : Theory, Methods and Applications Meeting (hosted by Sandia National labs/DOE), Santa Fe, NM 2011.
  30. K. A. Stephani, D. B. Goldstein and P. L. Varghese, "Parametric Study of Hypersonic Boundary Layer Flow over Discrete Surface Roughness Using a Hybrid DSMC/Navier-Stokes Solver," AIAA-2011-3250, 41st AIAA Fluid Dynamics Conference and Exhibit, June 27-30, Honolulu, HI 2011.
  31. G. Groskopf, M. Kloker and K. A. Stephani, "Temperature / rarefaction effects in hypersonic boundary-layer  flow with an oblique roughness element," AIAA-2011-3251, 41st AIAA Fluid Dynamics Conference and Exhibit, June 27-30, Honolulu, HI 2011.
  32. K. A. Stephani (Invited), "Formulation of the Generalized Chapman-Enskog Distribution for Hybrid CFD/DSMC Particle Generation," ICES Seminar, Institute for Computational Engineering and Sciences, The University of Texas at Austin, February 2011.
  33. K. A. Stephani, D. B. Goldstein and P. L. Varghese, "Development of a Hybrid DSMC/Navier-Stokes Solver with Application to the STS-119 Boundary Layer Transition Flight Experiments," AIAA-2011-534, 49th AIAA Aerospace Sciences Meeting and Exhibit, Jan. 4-7, Orlando, FL 2011.
  34. K. A. Stephani (Invited), D. B. Goldstein and P. L. Varghese, Effects of Rarefaction on Hypersonic Boundary Layer Flow Over Discrete Surface Roughness," AIAA-2010-456, 48th AIAA Aerospace Sciences Meeting and Exhibit, Jan. 4-7, Orlando, FL 2010.
  35. K. A. Stephani, D. B. Goldstein and P. L. Varghese, "Modeling the Disturbance Field Generated by Hypersonic Boundary Layer Flow over Roughness using DSMC," Presented at Direct Simulation Monte Carlo : Theory, Methods and Applications Meeting (hosted by Sandia National Labs/DOE), Sept. 13-16, Santa Fe, NM 2009.
  36. K. A. Stephani and D. B. Goldstein, "DNS Study of Transient Disturbance Growth and Bypass Transition due to Realistic Roughness," AIAA-2009-585, 47th AIAA Aerospace Sciences Meeting and Exhibit, Jan. 5-8, Orlando, FL 2009.
  37. K. A. Stephani and D. B. Goldstein, "Validation of the Immersed Boundary Technique for a DNS Study of Transient Disturbance Growth due to Surface Roughness," Presented at APS DFD Meeting, Nov. 23-25, San Antonio, TX 2008.
  38. K. A. Stephani and D. B. Goldstein, "The Effects of Trapped Bubbles on Viscous Drag Reduction for Submerged Surfaces," AIAA-2007-4101, 37th AIAA Fluid Dynamics Conference and Exhibit, June 25-28, Miami, FL 2007.
  39. K. A. Stephani, K. Marr, R. Doctor and D. B. Goldstein, "Drag Reduction Using Trapped Bubbles on a Flat Plate Surface," AIAA-2006-3193, 3rd AIAA Flow Control Conference, June 5-8, San Francisco, CA 2006.

conference proceedings and presentations

conference

dissertations/theses

  1. Swaminathan-Gopalan, K., "Consistent Treatment of Transport Properties of Weakly-Ionized Gas Mixtures in DSMC," Masters Thesis, Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, December 2015.
dissertations
publications
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