Daniel Edwin Rosner *61

Dan died Feb. 3, 2025, in Hamden, Conn. He was 91.

Born in October 1933 in the Bronx, Dan earned a B.S. in mechanical engineering from the City College of New York in 1955, and a Ph.D. in aeronautical engineering from Princeton in 1961.

He worked in the aerospace industry in Princeton, then joined the faculty at Yale with a joint appointment in chemical and environmental engineering and mechanical engineering, and was awarded the Llewellyn West Jones Jr. Chair.

Dan’s textbook, Transport Processes in Chemically Reacting Flow Systems, is used for teaching transport phenomena in chemical engineering departments. He received the David Sinclair lifetime achievement award from the American Association for Aerosol Research, an honorary doctorate from the Universidad Nacional de Educatión a Distancia in Madrid, and the Particle Technology Award from the American Institute of Chemical Engineers.

NASA sought Dan’s expertise on high-temperature reacting flows for the space shuttle orbiter’s siliconized pyrolytic carbon wing leading edge and nose cap thermal protection tiles, developed to withstand the extreme conditions of hypersonic reentry. Dan conducted experiments on the plates of the stegosaurus dinosaur in collaboration with the department of geology and geophysics at Yale and the Peabody Museum of Natural History.

Dan is survived by his wife, Susan; children Stefan and Lisa; and two grandchildren.

Graduate memorials are prepared by the APGA.