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Samuel Johnson's Resume

Summary

I have research and industry experience in the application and development of computation fluid dynamics (CFD) methods for modeling engineering systems. While my primary experience is in the area of multiphase flows, I have a general interest in numerical analysis.

Work Experience

CFD Analyst

Analysis and Design Applications Company (CD-adapco) 6/06 to Present

I currently work for CD-adapco where my principle duties are the thermal and fluid analysis engineering systems from the automotive, marine, energy and other industries, with my employer's state-of-the-art software, and clusters.

Postdoctoral Scholar/ Lecturer

University of California-Davis, Mechanical and Aerospace Engineering Department and the Center for Computational Science and Engineering 2/05 to 11/06

As a lecturer I taught an introductory course in thermodynamics to undergraduate engineering students and taugh a number of classes for an introductory fluid mechanics course.

In my role as a postdoctoral scholar, a parallel implementation of the volume of fluid (VOF) method with adaptive curvature-based refinement with spray-bases materials processing applications, and conducted research on an Eulerian mist model for fire supression. I was also privaledged to work with graduate and undergraduate researchers on Lagrangian spray models with application for fire supression and contagion spreading through a sneeze.

Graduate Research Assistant

Los Alamos National Laboratory Computational and Computer Science Division: 5/03 to 8/03 and 5/02/-8/02

As a research assistant, I was able to work with a wonderful team in the CCS-2 group on The Telluride Project: a largescale parallel code intended for the simulation of fluid flows involved in casting processes. Specifically, I investigated causes and solutions for numerically induced spurious currents and anisotropy from the treatment of the fluid interfaces.

Graduate Research Assistant

Colorado School of Mines, Division of Engineering: 8/99 to 1/05

During my time as a research assistant in the Center for Combustion and Environmental Research I primarily worked on the developement of a spray-based strip casting process in partnership with the University of California, Irvine, and the Idaho National Laboratory. I worked primarily on the develpment and application of numerical and analytical models to support the project. These models included two and three dimensional interfacial flow solvers with heat transfer and phase change (solidification), an analytical model describing oblique droplet impacts and a Lagrangian spray model, which was also applied to a fire supression application.

Education

Colorado School of Mines

Ph.D. in Engineering Systems (Emphasis in Thermal-fluids Systems)

  • Graduation Date: May 2005
  • Thesis Title: Droplet Spread, Rebound and Splash
  • Minor: Mathematics
  • GPA: 4.0 of 4.0

M.Sc. in Engineering Systems (Emphasis in Thermal-fluids Systems)

  • Graduation Date: December 2001
  • Thesis Title: Modeling and Numerical Simulation of Droplet Spreading and SSolidification after Impingement on a Cold Substrate
  • GPA: 4.0 of 4.0

B.Sc. in Engineering (Mechanical Specialty)

  • Colorado School of Mines, Golden, CO
  • Graduation Date: August 1999
  • GPA: 3.2 of 4.0

Miscallaneous

Computer Skills

Programming Languages: Fortran90/95/2000 (expert), Fortran77> (expert), C++ (proficient), C (proficient), Python (highly proficient), Java (elementary knowledge).

Citizenship

United States of America

Publications

Book Chapters and Articles

  1. J-P Delplanque, S. B. Johnson, L. L. Shaw, and Y. Zhou, Spray Deposition and coating processes, in CRC Materials Processing Handbook (section on Microstructure change processes), Eds. J. R. Groza, E. J. Lavernia, and J. F. Shackelford, CRC, 2006 (in preparation).

Refereed Archival Publications

  1. K. M. McHugh, Y. Lin, Y. Zhou, S. B. Johnson, J.-P. Delplanque, and E. J. Lavernia, Microstructure Treatment of 2124 Al, Materials Science and Engineering A, Vol. 447, pp. 26-34, 2008.

  2. K. M. McHugh, J-P Delplanque, S. B. Johnson, E. J. Lavernia, Y. Zhou, and Y. Lin, Spray Rolling Aluminum Alloy Strip, Materials Science and Engineering A, Vol. 383, pp. 96- 106, 2004.

Conference Papers and Presentations

  1. S. B. Johnson and J.-P. Delplanque, Seeking an Optimum Droplet Size Distribution for Water-Mist Fire Suppression, Paper #07F-44. 2007 Fall meeting of the Western States Sections of the Combustion Institute, Livermore, CA, October 16 & 17, 2007.

  2. S. B. Johnson and J.-P. Delplanque, Estimating Interface Curvature for Volume of Fluid Methods, Euromech 479, Sheveningen, Netherlands, August 2006.

  3. S. B. Johnson and J.-P. Delplanque, Numerical Simulation of Parameters Influencing Droplet Rebound, ILASS Americas 19th Annual Conference on Liquid Atomization and Spray Systems, Toronto, ON, Canada, May 2006.

  4. B. Chacon, S. B. Johnson and J.-P. Delplanque, Modeling Droplet Spreading on a Solid Substrate from First Contact through Recoil with an Energy Conservation Model, ILASSAmericas 19 Annual Conference on Liquid Atomization and Spray Systems, Toronto, ON, Canada, May 2006.

  5. S. B. Johnson and J.-P. Delplanque, Resolving Droplet Splashing with Adaptive Mesh Refinement and Accurate Curvature Estimation, DFD05 58th Annual Meeting Annual Meeting of the American Physical Society Division of Fluid Dynamics, November 20-22, 2005, Chicago, IL (submitted).

  6. S. B. Johnson and J.-P. Delplanque, Analyzing the Results of Droplet Impact Simulation by Volume of Fluid Methods: Physics or Numerical Errors? ILASS Americas 18th Annual Conference on Liquid Atomization and Spray Systems, Irvine, CA, May 2005.

  7. A. B. Oliver, S. B. Johnson, J.-P. Delplanque and C. S. Lengsfeld, Two Fluid VOF Simulation of Droplet Impact on a Liquid Pool, ILASS Americas 18th Annual Conference on Liquid Atomization and Spray Systems, Irvine, CA, May 2005.

  8. S. B. Johnson, J-P. Delplanque, Y. Lin, Y. Zhou, E. J. Lavernia and K. M. McHugh Numerical simulation and experimental characterization of a binary aluminum alloy spray - application to the spray rolling process, in EPD Congress 2005 - Proceedings of Sessions and Symposia Sponsored by the Extraction and Processing Division of The Minerals, Metals and Materials Society. 2005 TMS Annual Meeting. San Francisco, CA, USA. 13-17 Feb. 2005., pp. 509-517 (2005).

  9. K. M. McHugh, Y. Lin, Y. Zhou, E. J. Lavernia, J.-P. Delplanque and S. B. Johnson, Spray rolling aluminum strip for transportation applications, in MPMD Sixth Global Innovations Proceedings. Trends in Materials and Manufacturing Technologies for Transportation Industries and Powder Metallurgy Research and Development in the Transportation Industry. Proceedings of Symposium Sponsored by the Materials Processing & Manufacturing Division of TMS. 2005 TMS Annual Meeting. San Francisco, CA, USA. 13-17 Feb. 2005.

  10. S. B. Johnson, J.-P. Delplanque and M. Bussmann, Modeling and Simulation of Metal Droplet Impact, Spreading, and Solidification on a Solid Substrate, Euromech 450: Studies on Splashes a century after A. M. Worthington, Marseille, France, October 27-29, 2004.

  11. S. B. Johnson, S. J. Lewis and J.-P. Delplanque, Droplet-Resolved Dilute Spray Evaporation Model, 2004 Heat Transfer/Fluids Engineering Summer Conference, Charlotte, North Carolina, USA, July 11-15, 2004.

  12. K. M. McHugh, E. J. Lavernia, Y. Zhou, Y. Line, J.-P. Delplanque and S. B. Johnson, Aluminum Strip Processing by Spray Rolling, Proceedings of the Second International Conference on Spray Deposition and Melt Atomization and Fifth International Conference on Spray Forming, K. Bauckhage et al. Eds., Bremen, Germany, June 22-25, Vol. 2, pp. 6.27-6.38, 2003.

  13. Y. Lin, Y. Zhou, S. B. Johnson, J.-P. Delplanque, K. M. McHugh and E. J. Lavernia, On the Selection of Processing Parameters during Spray Rolling Process, Proceedings of theSecond International Conference on Spray Deposition and Melt Atomization and Fifth International Conference on Spray Forming, K. Bauckhage et al. Eds., Bremen, Germany, June 22-25, Vol. 2, pp. 7.17-7.30, 2003.

  14. S. B. Johnson, J.-P. Delplanque, Y. Lin, Y. Zhou, E. J. Lavernia and K. M. McHugh, Assisting Spray Rolling Process Development and Scale-up with Modeling and Numerical Simulation, Proceedings of the Second International Conference on Spray Deposition and Melt Atomization and Fifth International Conference on Spray Forming, K. Bauckhage et al. Eds., Bremen, Germany, June 22-25, Vol. 2, pp. 6.3-6.14, 2003.

  15. S. B. Johnson, J.-P. Delplanque, E. J. Lavernia, Y. Lin, Y. Zhou and K. M. McHugh, Spray Rolling: A Novel Technique for the Production of Aluminum Strip, Proceedings of ILASS Americas, 16th Annual Conference on Liquid Atomization and Spray Systems, Monterey, California, May 18-21, 2003.

  16. K. M. McHugh, E. J. Lavernia, Y. Zhou, Y. Lin, J.-P. Delplanque and S. B. Johnson, Spray Rolling Aluminum Strip--Process Development and Strip Properties, Symposium on Hot Deformation of Aluminum Alloys, 132nd Annual Meeting & Exhibition of TMS, San Diego, California, March 2-6, 2003.

  17. S. B. Johnson, J.-P. Delplanque, E. J. Lavernia, Y. Zhou, Y. Lin and K. M. McHugh, Spray Rolling Aluminum Strip: Process Modeling and Parametric Studies, Symposium on Hot Deformation of Aluminum Alloys, 132nd Annual Meeting & Exhibition of TMS, San Diego, California, March 2-6, 2003.

  18. S. B. Johnson and J.-P. Delplanque, Simulation Needs in the Modeling of Droplet-Based Processes: The case of spray-rolling, Presented at the Los Alamos National Laboratory Telluride Workshop, Santa Fe, NM, January 21-23, 2003.

  19. J.-P. Delplanque and S. B. Johnson, Y. Lin, Y. Zhou, N. Yang, K. M. McHugh and E. J. Lavernia, Using CFD Simulations to Improve Spray-Based Materials Processes, 2002 International Conference on Process Modeling in Powder Metallurgy & Particulate Materials, October 28-29, 2002, Newport Beach, California.

  20. S. B. Johnson, Y. Lin, Y. Zhou, J.-P. Delplanque, K. M. McHugh, and E. J. Lavernia, Modeling and Simulation of the Spray Rolling Process, 2002 International Conference on Process Modeling in Powder Metallurgy & Particulate Materials, October 28-29, 2002, Newport Beach, California.

  21. S. B. Johnson and J.-P. Delplanque, Modeling the Spray-Rolling Process: from droplets to spray, 39th Annual Technical Meeting of the Society of Engineering Science, Penn State University, PA, October 13-16th, 2002.

  22. S. B. Johnson and J.-P. Delplanque, Micro-Scale Aspects of Spray Deposition Processing: A semi-Analytical Model for Droplet Spreading and Solidification at Off-Normal Impact Angles, 2000 ASME IMECE, November 5-10, 2000 Orlando, FL, session on Transport Phenomena in Spray and Coating Processes – HTD-Vol. 366-3, Proceedings of the ASME Heat Transfer Division, Vol. 3, pp. 381-271-388, ASME 2000.

Other Publications

  1. S. B. Johnson, Droplet Spread, Rebound and Splash, Ph. D. Dissertation, Colorado School of Mines, Engineering Division, 2005.

  2. S. B. Johnson, Modeling and Numerical Simulation of Droplet Spreading and Solidification after Impinging on a Solid Substrate, Master of Science Thesis, Colorado School of Mines, Engineering Division, 2005.