Gregory Nellis

Gregory F. Nellis is a Professor of Mechanical Engineering at the University of Wisconsin-Madison, affiliated with the College of Engineering. His research focuses on heat transfer, cryogenics, and thermal systems, with notable contributions to two-phase flow, heat exchangers, and energy storage. He holds the Ouweneel-Bascom and Kaiser Chaired Professorships and has been recognized with numerous awards, including the ASHRAE Crosby Field Award and the James G. Woodburn Teaching Award.

Education:

• PhD, Mechanical Engineering, Massachusetts Institute of Technology (1997)
• MS, Mechanical Engineering, Massachusetts Institute of Technology (1995)
• BS, Mechanical Engineering, University of Wisconsin-Madison (1992)

Research Interests: Nellis specializes in advanced thermal management systems, cryogenic heat transfer, and energy-efficient thermal technologies. His work spans experimental and computational studies of two-phase flows, heat exchanger design, and supercritical CO₂ power cycles. Recent projects include Mars surface thermal management and nuclear isomer energy systems.

Awards & Recognition:

• Over 20 awards, including multiple Pi Tau Sigma Distinguished Professorships and teaching excellence honors.
• ASHRAE Fellow (2013).

Teaching & Advising:

• Teaches courses like Thermodynamics (M E 361) and Advanced Heat Transfer (M E 764).
• Advises graduate students on research in thermal systems and energy applications.

Labs & Collaborations: Engaged with interdisciplinary teams on projects involving additive manufacturing for heat exchangers and cryogenic systems. Collaborates with NASA and industry on space thermal management and energy storage technologies.