Reinier Timman

Reinier Timman (born May 6, 1917 in Den Helder , † November 9, 1975 in Delft ) was a Dutch applied mathematician and engineering scientist who has made a contribution to the mathematical engineering training and industrial mathematics in the Netherlands. He was a professor at the TU Delft and dealt with theoretical aerodynamics and ship hydrodynamics.

Life

He studied mathematics at the University of Amsterdam from 1934 to 1938 and worked at the Fokker factory from 1939 . During World War II he developed into an expert in theoretical aerodynamics and solved the difficult problem of determining the forces on a swinging wing in two dimensions with compressible air flow. He kept the work secret during the German occupation and received his doctorate in Delft in 1946 (Beschouwingen over de luchtkrachten op trillende vflugvleugels) with Hendrik Bremekamp and Johannes Martinus Burgers . In 1947 he went to the National Aviation Laboratory (Nationaal Luchtvaart Laboratorium) in Amsterdam, where he took over the theoretical department F in 1951 as the successor to Greidanus. In 1952 he became a professor of mathematics and mechanics at the TU Delft. In 1956 he achieved recognition for his training as a mathematical engineer. He also advised the Dutch shipbuilding research institute in Wageningen .

He was married to the mathematician Anna Petronella de Leeuw, with whom he had three sons and a daughter, including the chess grandmaster Jan Timman .

literature

• Life report of JH Greidanus in the annual report of the Royal Netherlands Academy of Sciences 1975
• G. Alberts: Jaren van berekening. Toepassingsgerichte initiatieven in de Nederlandse Wiskunde beoefening 1945-1960 , Amsterdam University Press, 1998

Fonts

• with AI van de Vooren, JH Greidanus: Aerodynamic coefficients of an oscillatory airfoil in two-dimensional subsonic flow. Journal of the Aeronautical Sciences, Volume 18, 1951, pp. 197-802
• The aerodynamic forces on an oscillatory airfoil between two parallel walls, Applied Scientific Research, Volume 3, 1951, pp. 31-57
• La théorie des profils minces en écoulement non-stationnaire en fluide incompressible ou compressible. Publications Scientifiques et Techniques du Ministère de l'Air. No. 296, 1952.
• with JH Greidanus, JH Zaat: The aerodynamic forces on oscillating blades of a helicopter rotor rotating in still air. NLR report F108, 1952
• with A I. van de Vooren: Flutter of a helicopter rotor rotating in its own wake. Journal of the Aeronautical Sciences, Volume 24, 1957, pp. 694-702
• Mathematical fundamentals of a berekening method voor profielen with voorgeschreven drukverdeling. NLR report F11, 1947.
• The direct and the inverse problem of aerofoil theory. A method with complete auxiliary tables to obtain numerical solutions. NLR report F16, 1950.
• Linearization of the equations of two-dimensional subsonic compressible flow by means of complex characteristics. Proceedings VIIth International Congress for Applied Mathematics, London, 1948, Volume 4
• Asymptotic formulas for special solutions of the hodograph equation in compressible flow, NLR-Report F46, 1949.
• Some remarks on the theory of near-sonic, near-parallel flow and its application to channel flow, NLR-Report, F53, 1949.
• Mathematical problems uit de theory of the laminaire grenslaagstroming, NLR-Rapport F18,1949.
• A one-parameter method for the calculation of laminar boundary layers, NLR-Report F35, 1949.
• A calculation method for three-dimensional laminar boundary layers, NLR-Report F66, 1950.
• La méthode des caractéristiques et le calcul de la couche limite laminaire du écoulement tridimensionel, Actes du colloque international de mécanique, Poitiers, Volume 2, pp. 251-259.
• with JA Zaat: A calculation method for three-dimensional laminar boundary layers. In Henry Görtler , Walter Tollmien : 50 years of boundary layer research, 1954, pp. 432–445
• with JA Zaat, E. van Spiegel: The three-dimensional boundary layer flow about a yawed ellipsoid at zero incidence. NLR report F165, 1955
• Hypersonic flow about a thin body of revolution. AGARD Report No 141, 1957.
• with JA Zaat, Th. J. Burgerhout: Stability diagrams for laminar boundary layerflow, NLR-Report F193, 1956
• with B. Lemaigre: La ligne portante de forme arbitraire considérée comme cas limite d´une surface portante en fluid incompressible. NLR report F95, 1951
• A method for the asymptotic solution of diffraction problems. IRE Transactions of Antennas and Propagation, Vol AP-4, 1956, pp. 209-216.
• Problems from the theory of three-dimensional boundary layers, boundary layer research. IUTAM Symposium Freiburg, (1957), Springer-Verlag, 1958, pp. 348-357.
• Linearized theory of unsteady flow of a compressible fluid, in Siegfried Flügge (Ed.), Handbuch der Physik, Encyclopedia of Physics, Springer-Verlag, Volume 9, 1960, pp. 283-311.
• The wave pattern of a moving ship, Simon Stevin, Wis-en Natuurkunidg Tijdschrift, Volume 35, 1961, pp. 53-68.
• Unsteady motion in transonic flow, Symposium Transonicum, IUTAM Symposium, Aachen. (1962), Springer-Verlag, 1964, pp. 394-402.
• with JN Newman: The coupled damping coefficients of a symmetric ship, Journal of Ship Research, Volume 5, No.4, 1962, pp. 1-7
• Optimization theory for ordinary differential equations, Journal of Engineering mathematics, Volume 1, 1967, pp. 159-186.
• Lectures on airfoil and hydrofoil theory, Technical note 148, Naval Ship Research and Development Center, Washington, 1969
• Small parameter expansions in ship hydrodynamics, Tenth Symposium on Naval Hydrodynamics, ACR-204 ONR, Arlington, 1974, pp. 439-447.
• Numerical methods in ship hydrodynamics, Proceedings of the first International Conference on Numerical Ship Hydrodynamics, DTNSRDC, Bethesda, 1975, pp. 1-11.
• with AJ Hermans, GC Hsiao: Water waves and ship Hydrodynamics, Martinus Nijhoff Publ. 1985

Web links

• Biography of Egbert van Spiegel, Dutch

Individual evidence

1. ↑ Reinier Timman in the Mathematics Genealogy Project (English)