Prandtl
| Ludwig Prandtl | |
|---|---|
Ludwig Prandtl
|
|
| Born |
4 February 1875 Freising, Upper Bavaria, German Empire |
| Died | 15 August 1953 (aged 78) Göttingen, West Germany |
| Nationality | German |
| Fields | Aerodynamics |
| Institutions |
University of Göttingen Technical School in Hannover |
| Alma mater | Technical University of Munich, RWTH-Aachen |
| Thesis | Tilting Phenomena, A case of unstable elastic balance (1899) |
| Doctoral advisor | August Föppl |
| Doctoral students | Ackeret, Blasius, Busemann, Munk, Nikuradse, Pohlhausen, Schlichting, Tietjens, Tollmien, von Kármán, Vishnu Madav Ghatage and many others (85 in total). |
| Known for |
Boundary layer Prandtl number |
| Notable awards |
Ackermann–Teubner Memorial Award (1918) Daniel Guggenheim Medal (1930) Wilhelm Exner Medal 1951 |
Ludwig Prandtl (4 February 1875 – 15 August 1953) was a German engineer. He was a pioneer in the development of rigorous systematic mathematical analyses which he used for underlying the science of aerodynamics, which have come to form the basis of the applied science of aeronautical engineering. In the 1920s he developed the mathematical basis for the fundamental principles of subsonic aerodynamics in particular; and in general up to and including transonic velocities. His studies identified the boundary layer, thin-airfoils, and lifting-line theories. The Prandtl number was named after him.
Prandtl was born in Freising, near Munich, in 1875. His mother suffered from a lengthy illness and, as a result, Ludwig spent more time with his father, a professor of engineering. His father also encouraged him to observe nature and think about his observations.
He entered the Technische Hochschule Munich in 1894 and graduated with a Ph.D. under guidance of Professor August Foeppl in six years. His work at Munich had been in solid mechanics, and his first job was as an engineer designing factory equipment. There, he entered the field of fluid mechanics where he had to design a suction device. After carrying out some experiments, he came up with a new device that worked well and used less power than the one it replaced.
In 1901 Prandtl became a professor of fluid mechanics at the technical school in Hannover, now the Technical University Hannover. It was here that he developed many of his most important theories. In 1904 he delivered a groundbreaking paper, Fluid Flow in Very Little Friction, in which he described the boundary layer and its importance for drag and streamlining. The paper also described flow separation as a result of the boundary layer, clearly explaining the concept of stall for the first time. Several of his students made attempts at closed-form solutions, but failed, and in the end the approximation contained in his original paper remains in widespread use.
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