Hassan M. Nagib is a mechanical engineer, aerospace engineer, and academic. He is the John T. Rettaliata Professor of Mechanical and Aerospace Engineering at the Illinois Institute of Technology and was also the Founding Director of the institute's Fluid Dynamics Research Center. Nagib is most known for his research in fluid mechanics, turbulent flow, and flow management and control. His research encompasses a range of topics, including fundamental aspects of fluids, applied turbulence, hydrodynamic stability and transition, wind engineering, and atmospheric diffusion. He is the recipient of Robert T. Knapp Award, the NASA Langley Achievement Award, and the IIT Professional Achievement Award. Nagib is a Fellow of the American Physical Society, American Association for the Advancement of Science, the American Institute of Aeronautics and Astronautics, and the American Society of Mechanical Engineers.
Education Nagib earned his Bachelor of Science in Mechanical and Aerospace Engineering from the Illinois Institute of Technology (IIT). In 1969, he completed his master's degree in the same field and subsequently pursued his doctoral studies, obtaining his Ph.D. in December 1972 from the same institute.
Career Nagib began his academic career as an instructor at the Illinois Institute of Technology in 1970, a role he held until 1972. Subsequently, he assumed the role of assistant professor in 1973 and continued his career within the institution, holding the position of associate professor from 1975 to 1979, becoming professor in August 1979. He also held the role of Affiliated Professor at the KTH Royal Institute of Technology from 2008 to 2014. Since 1981, he has been serving as the John T. Rettaliata Professor of Mechanical and Aerospace Engineering at IIT. Nagib served as the department chair and Director for the Fluid Dynamics Research Center (FDRC) from 1978 to 1999. He served as a Chairman of the MAE Department for ten years starting in 1985. Additionally, he took on the roles of Academic Vice President for the Main Campus and Dean of Armour College from 1995 to 1998. An article about his career appeared in the ILLINOIS TECH magazine in the Winter of 2007, 40 years after he relocated to the USA from Egypt, where he was born.
Research Nagib's research is primarily centered on fluid dynamics, with a specific emphasis on turbulent flows and flow management. He has contributed to the field, publishing numerous papers on topics such as applied turbulence, the mixing of unsteady flows, wind tunnel flow quality, wind engineering and atmospheric diffusion.
Turbulence manipulation and channel flow Nagib's research in fluid dynamics has explored turbulent boundary layers and wall-bounded flow behavior. He used flow visualization and hot wire measurements to assess downstream impact on skin friction distribution to explore the effects of introducing a parallel-plate turbulence manipulator into a boundary layer. In collaboration with Jens M. Österlund, Arne V. Johansson and Michael H. Hites, he examined turbulent boundary layer behavior through oil-film interferometry revealing that the parameters under investigation exhibited no significant dependence on Reynolds number, and that the traditionally used values of the von Kármán constant were not supported by their results. In subsequent research, he focused on flat plate turbulent boundary layers in zero-pressure-gradient conditions, shedding light on Reynolds number trends concerning the outer velocity defect and explaining relevant scale relations and asymptotic behavior. By conducting experiments in turbulent pipe and channel flows, he performed a comparative analysis of the von Kármán coefficient (κ) and the wake parameter (Π) in relation to Reynolds number concluding that the Kármán coefficient is not universal. He participated in the development and operation of the Center for International Cooperation in Long Pipe Experiments (CICLoPE) at the University of Bologna, Forli. In 2009, Nagib's research culminated in the estimation of a wall skin-friction relation, specifically for fully developed turbulent plane-channel flow. This research employed two approaches to derive the relationship. He also conducted research on the challenges within the theory and experimental methods employed in the study of wall-bounded turbulent flows highlighting modern advancements that challenged established conventional wisdom. Additionally, his investigations have encompassed the study of distant wake structures generated by the von Kármán street of vortices shed from a cylinder, with findings indicating that neither the magnitude nor frequency of these vortices significantly alter the remote wake structure. His research with Peter Monkewitz confirmed the non-universality of the von Kármán coefficient explaining that the overlap layer of wall-bounded flow is not a pure logarithmic function but includes a linear term, with a coefficient dependent on the pressure gradient of the flow.
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