Nonequilibrium Gas Dynamics Group

News for '97

Awards

The AIAA Electric Propulsion Best Paper Award was received by Iain Boyd along with co-authors Jeff Pobst and Ingrid Wysong (of the Air Force Phillips laboratory, Edwards Air Force Base) for their paper "Comparisons of Hydrogen Atom Measurements in an Arcjet Plume With DSMC Predictions". The award was presented at the AIAA Joint Propulsion Conference held in Seattle in July 1997. An Engineering College Teaching Prize was received by Iain Boyd at a ceremony on campus in September 1997.

Visitors

Dr. Stefan Stefanov from the Bulgarian Institute of Mechanics in Sofia visited for 8 weeks. He used our MONACO code to investigate the possible onset of turbulence in the wake of a cylinder under rarefied hypersonic conditions. Dr. Savino Longo from the University of Bari in Italy is visiting through a grant from the Italian government. He is working with the research group of Iain Boyd using particle and Monte Carlo methods to analyze chemical kinetics in plasmas used for materials processing and spacecraft propulsion.

Invited Lectures

  • Boyd, I.D., "Development and Application of a Parallel Monte Carlo Simulation Code," Pennsylvania State University, March 1997.
  • Boyd, I.D., Kossi, K. and Levin, D.A., "Direct Simulation of Ultra-Violet Emission From the Hydroxyl Radical," AIAA Thermophsyics Conference, Atlanta, June 1997.
  • Boyd, I.D., "Current Strengths and Limitations of the DSMC Method," Workshop on Mathematical Methods for Kinetics Problems, Berlin, Sept. 1997.
  • Boyd, I.D., "Parallel Monte Carlo Modeling of a Plasma Etch Reactor," 50th Gaseous Electronics Conference, Madison, WI, October 1997.

    Papers Published

  • Boyd, I.D., "Monte Carlo Simulation of Nonequilibrium Flow in Low Power Hydrogen Arcjets," Physics of Fluids, Vol. 9, 1997, pp. 3086-3095.
  • Chen, G. and Boyd, I.D., "Monte Carlo Simulation of Thin Film Deposition Using Supersonic Molecular Beams," Proceedings of the 20th International Symposium on Rarefied Gas Dynamics, 1997, p. 573.
  • Levin, D.A., Boyd, I.D., and Kossi, K.K., "Ultraviolet Radiation From the Hydroxyl Radical: A Diagnostic in Rarefied Flow," Proceedings of the 20th International Symposium on Rarefied Gas Dynamics, 1997, p. 651.
  • Font, G.I. and Boyd, I.D., "Effect of Nozzle Location on the Plasma Flow Field of a Chlorine Etch Reactor," Proceedings of the 20th International Symposium on Rarefied Gas Dynamics, 1997, p. 793.
  • Font, G.I. and Boyd, I.D., "DSMC-PIC Simulation of a Helicon Plasma Etch Reactor and Comparison With Experiments," in Process Control, Diagnostics, and Modeling in Semiconductor Manufacturing, Electrochemical Society, 1997, p. 275.
  • Boyd, I.D., "Extensive Validation of a Monte Carlo Model for Hydrogen Arcjet Flow Fields," Journal of Propulsion and Power, Vol. 13, 1997, pp. 775-782.
  • Boyd, I.D., Bose, D., and Candler, G.V., "Monte Carlo Modeling of Nitric Oxide Formation Based on Quasi-Classical Trajectory Calculations," Physics of Fluids, Vol. 9, 1997, pp. 1162-1170.

    Conference Papers

  • Boyd, I.D., Phillips, W.D., and Levin, D.A., "Sensitivity Studies for Prediction of Ultra-Violet Radiation in Nonequilibrium Hypersonic Bow-Shock Waves," AIAA Paper 97-0131, Reno, NV, January 1997.
  • Boyd, I.D., VanGilder, D.B., and Liu, X., "Monte Carlo Simulations of Neutral Xenon Flow of Electric Proplusion Devices," International Electric Propulsion Conference, Paper 97-20, September 1997.
  • VanGilder, D.B., Font, G.I., and Boyd, I.D., "Hybrid DSMC-PIC Computation of an Ion Thruster Plume," International Electric Propulsion Conference, Paper 97-182, September 1997.

    Students Graduated

  • Bapat, Aditi, "A Numerical Study of Unsteady Rarefied Flow Through an Axisymmetric Nozzle for Optimization of the IBEST Process," Master of Science Thesis, August 1997.

    New Grants Awarded

  • "Numerical Modeling of Low-Density Plumes Using a Monte Carlo Technique," NASA Lewis Research Center.
  • "Monte Carlo Modeling of Vapor Deposition Processes," Lawrence Livermore National Laboratory.
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