Department of Mechanical and Aerospace Engineering


Leonard Case Jr. Professor Emeritus of Engineering

Phone: (216) 368-4581
Office Location: Glennan 620A

  • Ph.D., Princeton University, 1971 (Aerospace and Mechanical Sciences)
  • M.S., Purdue University, 1966, (Engineering Sciences)
  • B.S.E., National Taiwan Univsersity, 1963 (Mechanical Engineering)
Research Areas:
  • Combustion(terrestrial and extraterrestrail)
  • Propulsion
  • Fire Research
Teaching Interests:
  • Fluid and Thermal Sciences
  • Propulsion
  • Combustion
  • T’ien, J. S.: “Theoretical Analyses of Combustion Instability,” Chapter 14 in Fundamentals of Combustion of Solid Propellants, American Institute of Aeronautics and Astronautics Progress Series, Vol. 90, edited by K. Kuo and M. Summerfield (1984).
  • T’ien, J.S., Shih, H.Y, Jiang, C.B., et al: Chapter 5 in “Mechanisms of Flame Spread and Smolder Wave Propagation”, Microgravity Combustion: Fire in Free Fall, pp. 299-345, (H. Ross, ed.), Academic Press (2001).
  • T’ien, J. S., Some partial scaling considerations in microgravity combustion problems, Progress in Scale Modeling, Kozo Saito (ed.), pp.281-292, Springer (2008).
  • Brady, K, Sung, C.-J. and T’ien, J.S.: Dispersion and catalytic ignition of hydrogen leaks within enclosed spaces, International Journal of Hydrogen Energy, Volume 37, Issue 13, July 2012, Pages 10405-10415
  • Kumar, A. and T’ien, J.S.: Numerical modeling of limiting oxygen index apparatus for film type fuels, International Journal of Spray and Combustion Dynamics, Volume 4, Number 4, 2012, Pages 299-322
  • T’ien, J.S. and Endo, M.: Material flammability: a combustion science prospective, Procedia Engineering 62 (2013) 120 – 129
  • Bartkus, T.P., T’ien, J.S. and Sung, C.-J.: A Semi-Global Reaction Rate Model Based on Experimental Data for the Self-Hydrolysis Kinetics of Aqueous Sodium Borohydride, International Journal of Hydrogen Energy, 38 (2013) 4024-4033
  • Liao, Y.-T. T. and T’ien, J.S.: A numerical simulation of transient ignition and ignition limit of a composite solid by a localized radiant source, Combustion Theory and Modelling (2013), DOI: 10.1080/13647830.2013.831486
  • Takahashi, F., Abbott, A., Murray, T.M., T’ien, J.S., Olson, S.L.: Thermal response characteristics of fire blanket materials, Fire and Materials (2013), DOI: 10.1002/fam.2202
  • Johnston, M.C., T’ien, J.S., Muff, D.E., Zhao, X., Olson, S.L. and Ferkul, P.V., Self -induced Buoyant Blow Off in Upward Flame Spread on Thin Solid Fuels, Fire Safety Journal, 71, January, 2015, Pages 279-286.
  • Zhao, X. and T’ien, J.S., A Three-dimensional Transient Model for Flame Growth and Extinction in Concurrent Flows, Combustion and Flame 162 (2015) 1829-1839,
  • Zhao, X., Liao, Y.-T. T., Johnston, M.C., T’ien, J.S., Ferkul, P.V. and Olson, S.L., Concurrent flame growth, spread and quenching over composite fabric samples in low speed purely forced flow in microgravity, Proceedings of the Combustion Institute 36 (2017) 2971–2978.
  • Johnston, M. C., T’ien, J. S., Gravimetric measurement of solid and liquid fuel burning rate near and at the low oxygen limit, Fire Safety Journal, 91, July 2017, Pages 140-146.
  • Garbinski, G.P. and T’ien, J.S., Cyclic Quenching and Ignition of Low-stretch Diffusion Flames, International Journal of Energetic Materials and Chemical Propulsion, 16(2):151-163 (2017).
  • Li, C., Liao, Y.-T.T., T’ien, J.S., Urban, D.L., Ferkul, P.V., Olson, S.L., Gary A. Ruff, G.A. and Easton, J., Transient Flame Growth and Spread Processes over Large Solid Fabric Samples in Concurrent Low-Speed Flows in Microgravity – a Comparison between Model and Experiment, Proceedings of the Combustion Institute 37 (2018)
  • Kang, J., Takahashi, F., and T’ien, J.S., In situ thermal-conductivity measurements and morphological characterization of intumescent coatings for fire protection, Journal of Fire Sciences (2018) DOI: 10.1177/0734904118794955
 Honors & Awards:
  • Public Service Medal, NASA, 2000
  • Honorable Member, Combustion Institute, Chinese Taipei Section, 2001
  • Space Processing Award, American Institute of Aeronautics and Astronautics, 2015
  • Fellow, Combustion Institute, 2018