LAITONE

LAITONE 06.09. 1915 San Francisco CA/USA 18.12. 2000 Berkeley CA/USA Edmund (Ed) Victor Laitone obtained the BS degree from University of California, Berkeley CA in 1943, the MS degree in applied mathematics in 1944, and the PhD degree in 1962 from the University of California, Stanford CA. He had been from 1938 to 1945 aeronautical research engineer at Langley Field VA, and then for two years principal engineer at the Cornell Aeronautical Laboratory, Buffalo NY. From 1947 to 1954 Laitone was associate professor of mechanical engineering at Berkeley CA, and then continued as professor of aeronautical engineering there until retirement. He had in parallel a number of assignments in the industry relating to both aviation techniques and guided missiles research. He was a member of the American Physical Society APS, and the Institute of Aeronautical Sciences. Laitone was a respected expert in aerodynamics with engagements in major engineering companies. He explored a large range of research topics, all within the realm of fluid mechanics and ranging from subsonic aerodynamic problems to papers on supersonicand magneto-gasdynamics. He will be remembered particularly for his chapter Surface waves co-authored by John V. Wehausen (1913-2005), in which the mathematical theory of water waves is thoroughly discussed. Both two-and three-dimensional waves are considered, from the basic theory of sinusoidal waves to complicated waves in basins. A special chapter also includes steady two-dimensional waves known as shock waves, resulting from disturbances of a supercritical stream. This book is still of great value today because of its excellent mathematical approach. A Fellow of the American Institute for Aeronautics and Astronautics AIAA since 1988, he was also the US academic representative on the Flight Mechanics Panel of NATO’s Advisory Group for Aerospace Research and Development AGARD from 1984 to 1988. Anonymous (1959). Laitone, Edmund V. Who’s who in engineering 8: 1413. Lewis: New York. Anonymous (1962). Prof. Ed Laitone. Mechanical Engineering 84(8): 82. P Laitone, E.V. (1947). Exact and approximate solutions of two-dimensional oblique shock flow. Journal of the Aeronautical Sciences 14(1): 25-41. Laitone, E.V. (1952). A study of transonic gas dynamics by the hydraulic analogy. Journal of the Aeronautical Sciences 19(4): 265-272. Wehausen, J.V., Laitone, E.V. (1960). Surface waves. Encyclopaedia of physics 9: 446-778, C.A. Truesdell, ed. Springer: Berlin. https://www.me.berkeley.edu/announcements/laitone.html P

LAMB O.P. 11.12. 1922 Golden Valley MN/USA 08.08. 2008 Minneapolis MN/USA Owen Peter Lamb made civil engineering studies at Minneapolis University, Minnesota MN, obtaining the BSc degree in 1943, and the MS degree in 1946, then joining in 1953 the Saint Anthony Falls SAF Hydraulic Laboratory as research fellow. He there remained all through his career having great success with researches in air-water flows. Besides, he was involved in studies with a sixty-inch water tunnel developed at SAF in the late 1940s, the set-up of an internationally known test channel allowing for the observation of air-water flows of bottom angles from 15° to 75° in 1952, velocity measurements of these flows shortly later, and two benchmark studies on the then final results of this test campaign. From 1956 Lamb took interest in aeronautical questions including for instance the lift effectiveness of spoilers. The 1950 Report deals with an electrical method developed to measure concentrations of air of high-speed laboratory air-water flows. The method consists of the measurement of the difference between the conductivity of air-water flow, and water flow alone. A mechanical strut supporting a pair of electrical probes was combined with the electrical circuit so that air concentration measurements are recorded at a relatively small flow region. The instrument allowed for the detection of the air concentration both vertically and laterally of the flow field. It was found from further theoretical examinations that the recorded values were sufficiently accurate for engineering purposes. This instrument marked the initiation of detailed flow observations at the SAF Laboratory, culminating in the famous 1959 paper by Lorenz G. Straub (1901-1963) and Alvin G. Anderson (1911-1975). Anonymous (2008). Owen Peter Lamb. Star Tribune: Newspaper Twin Cities (Aug. 11): 8. P Lamb, O.P., Killen, J.M. (1950). An electrical method for measuring air in flowing air-water mixture. Technical Paper B2. St. Anthony Falls Hydraulic Laboratory: Minneapolis. Stefan, H.G., Foufoula-Georgiu, E., Arndt, R.E.A. (2004). The St. Anthony Falls Laboratory: A rich history and a bright future. Proc. EWRI Annual Meeting: 185-197. Straub, L.G., Killen, J.M., Lamb, O.P. (1954). Velocity measurements of air-water mixture. Trans. ASCE 119: 207-220. Straub, L.G., Lamb, O.P. (1956). Experimental studies of air entrainment in open channel flow. Trans. ASCE 121: 30-44. https://www.gps.caltech.edu/~mpl/owen_p.htm P