Dr. Kyosung Choo

Associate Professor
Kyosung Choo - profile photo

Kyosung Choo

Associate Professor

Rayen School of Engineering

kchoo@ysu.edu

Headshot Dr choo

 

Kyosung Choo, Ph.D., is an Associate Professor of Mechanical Engineering at Youngstown State University. Prior to joining YSU, he served as a postdoctoral fellow in the Center for Environmental Energy Engineering at University of Maryland.

He received his Ph.D. and M.S. in Mechanical Engineering from KAIST (Korea Advanced Instituted of Science and Technology) and his B.S. in Mechanical and Control Engineering from Handong University, Korea. His research interests include heat transfer for additive and advanced manufacturing, two-phase flow, jet impingement, energy efficiency of data centers and buildings, and electronics cooling.

He has published over 50 articles and papers in the field. He is a recipient of Outstanding Research Award from Brain Korea 21 in 2010 and Outstanding Academic Award from KAIST in 2011.

  • Research Focus

    His research interests include heat transfer for additive and advanced manufacturing, two-phase flow, jet impingement, energy efficiency of data centers and buildings, and electronics cooling.

  • Expertise

    He has published over 40 articles and papers in the field. He is listed in Who’s Who in the World 2011 and a recipient of Outstanding Research Award from Brain Korea 21 in 2010 and Outstanding Academic Award from KAIST in 2011.

  • Journal Articles

    1. B. Friedrich, K. Choo, “Thermal-Stress Characteristics of a Large Area Additive Manufacturing,” Heat Transfer Engineering 44 (2022) https://doi.org/10.1080/01457632.2022.2119919

    2. A. Glaspell, J.A. Diosdado-De la Pena, S. Dahal, S. Neupane, J.J. Ryu, K. Choo, “Heat Transfer and Structural Characteristics of Dissimilar Joints Joining Ti-64 and NiTi via Laser Welding” Energies 15 6949 (2022) doi.org/10.3390/en15196949.

    3. K. I. Alsharif, A.H. Pesch, V. Borra, F.X. Li, P. Cortes, E. Macdonald, K. Choo, “A Coupled Thermo-Mechanical Dynamic Characterization of Cylindrical Batteries,” IEEE Access 10 (2022) pp. 51708 - 51722.

    4. A. Glaspell, J.A. Diosdado-De la Pena, J.J. Ryu, K. Choo, “Thermal Stress Characteristics of Dissimilar Joints Joining Ti-64 and CCM via Linear Friction Welding,” Energies 15 (2022) doi.org/10.3390/en15155588.

    5. K. I. Alsharif, A.H. Pesch, V. Borra, F.X. Li, P. Cortes, E. Macdonald, K. Choo, “A Novel Modal Representation of Battery Dynamics,” IEEE Access 10 (2022) pp. 16793 - 16806.

    6. K.I. Alsharif, A. Glaspell, K. Choo, “Energy Conservation Measures for a Research Data Center in an Academic Campus,” Energies 14 (2021) doi.org/10.3390/en14102820.

    7. C. C. Santiago, B. Yelamanchi, J. A. Diosdado De la Peña J. Lamb, K. Roguski, F. Turzy´nski, R. Faruqui, K. Choo, A. Du Plessis, F. Sillani, E. MacDonald, P. Cortes, “Thermoplastic Extrusion Additive Manufacturing of High-Performance Carbon Fiber PEEK Lattices,” Crystals 11 (2021) 1453.

    8. V. Rouse, K. Choo, “Heat Transfer Characteristics of Submerged and Free Surface Air-assistant Water Jet Impingement,” Global Journal of Engineering Sciences 7 (2021) DOI: 10.33552/GJES.2021.07.000662.

    9. J. Son, N. Lin, J. Simcox, K. Choo, “Heat transfer characteristics of two-phase impinged jet flow and channel flow,” Heat Transfer Engineering 43 (2021) doi.org/10.1080/01457632.2020.1860539.

    10. K. Choo, B. Friedrich, T. Daugherty, A. Schmidt, C. Patterson, M. Abraham, B. Conner, K. Rogers, E. MacDonald, P. Cortes, “Heat Retention Modeling of Big Area Additive Manufacturing,” Additive Manufacturing 28 (2019) 325-332.

    11. A. Glaspell, V. Rouse, B. Friedrich, K. Choo, “Heat transfer and hydrodynamics of air assisted free water jet impingement at low nozzle-to-surface distances,” International Journal of Heat and Mass Transfer 132 (2019) 138-142.

    12. K. Lyda, S. I. Moldovan, K. Choo, “Influence of mixing and diffusion on moisture content of corn in a feed mill wet bin,” Biosystems Engineering 178 (2019) 102-108.

    13. Abdullah Kuraan, Stefan I. Moldovan, Kyosung Choo, “Heat Transfer and Hydrodynamics of Free Water Jet Impingement at Low Nozzle-to-plate Spacings,” International Journal of Heat and Mass Transfer 108 (2017) 2211-2216.

    14. Friedrich, Brian K., Tamira D. Ford, Aspen W. Glaspell, Kyosung Choo, “Experimental study of the hydrodynamic and heat transfer of air-assistant circular water jet impinging a flat circular disk, International Journal of Heat and Mass Transfer 106 (2017) 804-809.

    15. Friedrich B. K., A.W. Glaspell, K. Choo, “The Effect of Volumetric Quality on Heat Transfer and Fluid Flow Characteristics of Air-assistant Jet Impingement, Int. Journal of Heat and Mass Transfer 101 (2016) 261-266.

    16. K. Choo, Friedrich B. K., A.W. Glaspell, K. Schilling, “The Influence of Nozzle-to-plate Spacing on Heat Transfer and Fluid Flow of Submerged Jet Impingement,” Int. Journal of Heat and Mass Transfer 97 (2016), 66 – 69. 

    17. K. Choo, and S. J. Kim, “The influence of nozzle diameter on the circular hydraulic jump of liquid jet impingement,” Experimental Thermal and Fluid Science 72 (2016) 12-17.

    18. J. Levy, K. Choo, and M. M. Ohadi, “Energy audit and energy conservation measures for a restaurant building,” ASHRAE Transaction 121 (2015). 

    19. K. Choo, R. M. Galante, and M. M. Ohadi, “Energy consumption analysis of a medium-size primary data center in an academic campus,” Energy and Buildings 76 (2014) 414-421.

    20. H. Ganapathy, A. Shooshtari, K. Choo, S. Dessiatoun, M. AlShehhi, and M. M. Ohadi, “Volume of fluid-based numerical modeling of condensation heat transfer and fluid flow characteristics in microchannels,” International Journal of Heat and Mass Transfer 65 (2013) 62-72.

    21. K. Choo, T. Y. Kang, and S. J. Kim, “The Effect of Inclination on Impinging Jets at Small Nozzle-to-plate Spacing,” International Journal of Heat and Mass Transfer 55 (2012) 3327-3334.

    22. K.-L. Suk, K. Choo, S. J. Kim, J.-S. Kim, and K.-W. Paik, “Studies on Various Chip-on-Film (COF) Packages using Ultra Fine Pitch 2-Metal Layer Flexible Printed Circuits (FPCs),” Microelectronics Reliability 52 (2012) 1182-1188.

    23. K. Choo and S. J. Kim, “Heat transfer and fluid flow characteristics of non-boiling two-phase flow in microchannels,” ASME Journal of Heat Transfer 133 (2011) 102901.

    24. C. Byon, K. Choo and S. J. Kim, “Experimental and analytical study on chip hot spot temperature,” International Journal of Heat and Mass Transfer 54 (2011) 2066-2072.

    25. Y. J. Youn, K. Choo and S. J. Kim, “Effect of confinement on heat transfer characteristics of a microscale impinging jet,” International Journal of Heat and Mass Transfer 54 (2011) 366-373.

    26. K. Choo and S. J. Kim, “Heat transfer and fluid flow characteristics of two-phase impinging jets,” International Journal of Heat and Mass Transfer 53 (2010) 5692-5699.

    27. K. Choo and S. J. Kim, “Comparison of thermal characteristics of confined and unconfined impinging jets,” International Journal of Heat and Mass Transfer 53 (2010) 3366–3371.

    28. K. Choo and S. J. Kim, “Heat transfer characteristics of impinging air jets under a fixed pumping power condition,” International Journal of Heat and Mass Transfer 53 (2010) 320–326.

    29. K. Choo, Y. J. Youn, S. J. Kim, and D. H. Lee, “Heat transfer characteristics of a micro-scale impinging slot jet,” International Journal of Heat and Mass Transfer 52 (2009) 3169-3175.

    30. C.-K. Chung, Y.-M. Kwon, I. Kim, H.-Y. Son, K. Choo, S. J. Kim, K.-W. Paik, “Theoretical prediction and experimental measurement of the degree of cure of anisotropic conductive films (ACFs) for chip-on-flex (COF) applications,” IEEE Journal of Electronic Materials, 37 (10) (2008) 1580-1590.

  • Book and Book Chapters

    1. M. M. Ohadi., K. Choo, M. Shah, “2013 ASHRAE Handbook - Fundamentals: Chapter 4: Heat Transfer & Chapter 5: Two-Phase flow,” ISBN 978-1936504459.

    2. M. M. Ohadi, K. Choo, S. Dessiatoun, and E. Cetegen, “Next Generation Microchannel Heat Exchangers,” 2012, Springer, New York, ISBN 978-1-4614-0778-2.

  • Conference and Other Publications

    1. Aspen Glaspell, Jae Joong Ryu, Kyosung Choo, “Thermal Stress Simulation Model of TI6AL4V-NITI Dissimilar Laser Welding Process,” ASME International Manufacturing Science and Engineering Conference, 2021, USA. 

    2. J. Angel Diosdado De la Pena, Kyosung Choo, “Simulation of Metal Additive Manufacturing,” International Conference on Fluid Flow, Heat and Mass Transfer, 2021, Canada. 

    3. Khaled Alsharif, Kyosung Choo, “Simulation of a Research Data Centre Room in an Academic Campus,” International Conference on Fluid Flow, Heat and Mass Transfer, 2020, Canada. 

    4. Brian Friedrich, Kyosung Choo, “Thermal Simulation of Big Area Additive Manufacturing,” International Conference on Fluid Flow, Heat and Mass Transfer, 2020, Canada. 

    5. Aspen Glaspell, Christina Seydlorsky, Jae Joong Ryu, Kyosung Choo, “Thermal Stress Simulation Model of Dissimilar Linear Friction Welding Technology for Manufacturing of Bi-Metallic Biomedical Implants,” ASME International Manufacturing Science and Engineering Conference, 2020, USA. 

    6. D. Irwin, C. Seydlorsky, A. Gautam, A. Glaspell, K. Choo, J.J. Ryu, “Dissimilar linear friction welding technology for manufacturing of functional materials: Bi-metallic Ti6Al4V-CoCrMo joint implants,” Summer Biomechanics, Bioengineering and Biotransport Conference, June 25-28, 2019, Seven Springs, USA.

    7. C. Seydlorsky, D. Irwin, A. Glaspell, K. Choo, J.J. Ryu, “Life Expectancy of Linear Friction Welding: Joining of Dissimilar Metals,” IISE Annual Conference and Expo, May 18-21, 2019, Orlando, USA.

    8. A. Glaspell, V. Rouse, K. Choo, “Nozzle-to-Surface Distances Effect on Heat Transfer of Two-Phase Impinging Jets,” International Conference on Fluid Mechanics, Heat Transfer and Thermodynamics, June 17-19, 2019, Toronto, Canada.

    9. A. Glaspell, K. Choo, “The Effect of Nozzle-to-plate Spacing on Unconfined Air-assistant Water Impinging Jets,” International Conference of Fluid Flow, Heat and Mass Transfer, June 6-9, 2018, Niagara Fall, Canada.

    10. K. Lyda, K. Choo, “Moisture Variability during Drying, Mixing, and Storage for a Feed Mill Wet Bin,” International Conference of Fluid Flow, Heat and Mass Transfer, June 6-9, 2018, Niagara Fall, Canada.

    11. A. Kuraan, K. Choo, “Heat Transfer Characteristics of Submerged Two phase Impinging Jets,” International Conference of Fluid Flow, Heat and Mass Transfer, August 21-23, 2017, Toronto, Canada.

    12. A. Kuraan, K. Choo, “The Influence of Nozzle-to-plate Spacing on The Circular Hydraulic Jump of Water Jet Impingement,” IEEE ITherm, May 30 - June 2, 2017, Orlando, USA

    13. Choo K., M.M.Ohadi, D. Cooper “Simulation and Experimental Analysis of Data Centers in Academic Campus,” IEEE ITherm, May 30 - June 2, 2017, Orlando, USA

    14. J. Kelley, K. Choo, V. Rao, S.V. Dessiatoun, and M.M.Ohadi, “Boosting Electrical Generation of a Photovoltaic Array by Thermal Harvest from p-Si Cells: An Experimental and Theoretical Study,” IEEE ITherm, May 30 - June 3, 2016, Las Vegas, USA

    15. K. Choo, K. Schilling, B. K. Friedrich, “The Effects of Nozzle-to-plate Spacing on Impinging Jet Heat Transfer and Fluid Flow,” First Thermal and Fluids Engineering Summer Conference 2015, Aug. 9-12, New York, USA.

    16. K. Choo, R. M. Galante, and M. M. Ohadi, “Energy audit of a data center in University of Maryland,” ASME 2013 Summer Heat Transfer Conference, July 14-19, Minneapolis, USA.

    17. K. Choo, R. M. Galante, and M. M. Ohadi, “PUE of a data center in University of Maryland,” Semi-Therm 2013, Mar. 17-21, San Jose, USA.

    18. H. Ganapathy, A. Shooshtari, K. Choo, S. Dessiatoun, M. AlShehhi, and M. M. Ohadi, “Numerical analysis of condensation of R134a in a single microchannel,” IMECE 2012, Nov. 9-15, Houston, USA.

    19. M. M. Ohadi, S. Dessiatoun, K. Choo, M. Pecht, and J. Lawler, “Air vs. liquid and two-phase cooling of data centers,” Semi-Therm 2012, Mar. 18-22, San Jose, USA. S. J. Kim, K. Choo, “Impinging jets: Fundamentals and applications,” 8th International Conference on Flow Dynamics 2011, Nov. 9-11, Sendai, Japan.

    20. K. Choo and Sung Jin Kim, “Hydraulic jump of free liquid jet impingement,” International Mechanical Engineering Congress & Exposition 2011, Nov. 11-17, Denver, USA.

    21. K. Choo, D. Trainer, and S. J. Kim, “The effect of channel diameter on heat transfer characteristics of two-phase flow in microchannels,” ASME/JSME 8th Thermal Eng. Con. 2011, Mar. 13-17, Hawaii, USA.

    22. K. Choo and S. J. Kim, “Heat transfer augmentation by two-phase impinging jet,” International Heat Transfer Conference 2010,” August 8-13, Washington D.C., USA.

    23. K. Choo and S. J. Kim, “Air jet impingement heat transfer at low nozzle-to-plate spacings under a fixed pumping power condition,” Summer Heat Transfer Conference 2009, July 19-23, Sanfrancisco, USA.

    24. C. Byon, S. J. Kim, and K. Choo, “Heat Transfer Characteristics of Aluminum Foam Heat Sinks subject to and Impinging Jet,” ASME Summer Heat Transfer Conference 2009, July 19-23, San Francisco, USA.

    25. Y. J. Youn, K. Choo, and S. J. Kim, “Heat transfer characteristics of a microscale impinging jet from a confined nozzle,” the 7th JSME-KSME Thermal and Fluids Engineering Conference 2008, Oct. 13-16, Hokkaido, Japan.

    26. K. Choo, I. Y. Han, and S. J. Kim, “The effect of various wafer thicknesses on hot spot temperature,” ITherm 2008, May 28-31, Orlando, USA.

    27. C.-K. Chung, Y.-M. Kwon, I. Kim, H.-Y. Son, K. Choo, S. J. Kim, and K.-W. Paik, “Theoretical prediction and experimental measurement of the degree-of-cure of anisotropic conductive film (ACF) for chip-on-flex (COF) applications,” The 9th International Symposium on Electronic Materials and Packaging 2007, Nov. 19-22, Daejeon, Korea.