Marshall Long

Marshall B. Long is Emeritus Professor of Mechanical Engineering at Yale University. A native of Montana, he completed his BA in physics at the University of Montana in 1976 and received his MS and PhD in Engineering and Applied Science from Yale University in 1978 and 1980, respectively. He joined the Yale faculty that same year and was an active member of the School of Engineering & Applied Science for more than four decades.

Professor Long’s research focused on the development and application of laser-based diagnostic techniques to problems in fluid mechanics and combustion. His laboratory pioneered multidimensional imaging methods using Rayleigh, Raman, Lorenz/Mie, and fluorescence scattering to obtain quantitative measurements in reacting and nonreacting flows. His work has helped define the modern field of optical diagnostics in combustion research, providing critical insights into the fundamental physics of turbulent flames and pollutant formation. Long has published extensively in leading journals of combustion science and optical physics, and his experimental techniques are now employed in laboratories throughout the world. His research on soot formation, microgravity combustion phenomena, and the integration of advanced laser diagnostics with high-fidelity numerical simulations has been supported by agencies including NASA, the National Science Foundation, the Department of Energy, and the Air Force Office of Scientific Research.

At Yale, Long has served as Director of Graduate Studies for Engineering and Applied Science, Department Chair of Mechanical Engineering, and Director of Undergraduate Studies for Mechanical Engineering and Materials Science. His leadership has shaped both undergraduate and graduate education in engineering.

Among numerous honors, he is a Fellow of the Optical Society of America and of The Combustion Institute, where he received the Silver Medal in recognition of distinguished contributions to combustion research.