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professors emeritus
Youngdon Choi
Name
Youngdon Choi | Professor
Tel
+82-2-3290-3355
Fax
+82-2-928-1067
E-mail
ydchoi@korea.ac.kr
address
Dept. of Mechanical Engineering, Korea University, 5, Anam-dong, Sungbuk-ku, Seoul, 136-713, KOREA (South)
Education
1973. 02 B.S. Seoul National Univ., Mechanical Eng.
1975. 08 M.S. KAIST., Mechanical Eng.
1979. 08 Ph. D. KAIST., Mechanical Eng.
Lab.
Renewable Energy System & Turbulence Flow Lab.
Energy System
  • Material Processing(Crystal Growth)
  • Environmental
  • Energy Efficiency
  • Study on Alternative Energy
Reserches on flooding phenomenon
  • Passive flooding removal in fuel cells by capillary effects
  • Removal of flooding in fuel cells by acoustical methods
  • Variations of flow fields
  • Dimensionless number for flooding prediction
  • Visualizations of flooding
Research on Heat Transfer
  • Improvement of heat transfer in the electric devices
  • Development of computational algorithm for improving heat transfer
Development of Turbulence Modeling
  • Turbulent Simulation
  • Development of Algorithms (LES/DNS)
  • Development of Turbulence Modeling
Computational Fluid Dynamic
Fluent, CFX, Fortran, C++
Fuel Cell System
Fuel cell is an energy converter that may become an alternative to fossil fuels. Fuel cells have qualified and improved efficiency, which allows to meet international environment regulations, provide higher electric power performance, and have higher capacity limits than fossil fuels.
  • correlations between the flooding phenomenon in the PEMFC cathode and the wide ranges of the operating conditions such as air stoichiometry, temperature of the cell outlet, and pressure drop
  • Predict whether or not flooding within the channels would occur by obtaining a dimensionless number and by expressing the mass of the water remaining in the channel as a dimensionless number.