Earle Hesse Kennard (August 2, 1885 – January 31, 1968) was a theoretical physicist and professor at

Cornell University Cornell University is a Private university, private Ivy League research university based in Ithaca, New York, United States. The university was co-founded by American philanthropist Ezra Cornell and historian and educator Andrew Dickson W ...

Biography

Kennard was born in

Columbus, Ohio Columbus (, ) is the List of capitals in the United States, capital and List of cities in Ohio, most populous city of the U.S. state of Ohio. With a 2020 United States census, 2020 census population of 905,748, it is the List of United States ...

and studied at

Pomona College Pomona College ( ) is a private university, private Liberal arts colleges in the United States, liberal arts college in Claremont, California. It was established in 1887 by a group of Congregationalism in the United States, Congregationalists ...

and

Oxford University The University of Oxford is a collegiate research university in Oxford, England. There is evidence of teaching as early as 1096, making it the oldest university in the English-speaking world and the second-oldest continuously operating u ...

as part of a Rhodes Scholarship. He went on to earn his Ph.D. from Cornell in 1913, where he would continue most of his scientific career. During a 1926 sabbatical spent at the

University of Göttingen The University of Göttingen, officially the Georg August University of Göttingen (, commonly referred to as Georgia Augusta), is a Public university, public research university in the city of Göttingen, Lower Saxony, Germany. Founded in 1734 ...

, he learned the newly developing

quantum mechanics Quantum mechanics is the fundamental physical Scientific theory, theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms. Reprinted, Addison-Wesley, 1989, It is ...

Werner Heisenberg Werner Karl Heisenberg (; ; 5 December 1901 – 1 February 1976) was a German theoretical physicist, one of the main pioneers of the theory of quantum mechanics and a principal scientist in the German nuclear program during World War II. He pub ...

and

Pascual Jordan Ernst Pascual Jordan (; 18 October 1902 – 31 July 1980) was a German theoretical and mathematical physicist who made significant contributions to quantum mechanics and quantum field theory. He contributed much to the mathematical form of matri ...

. With this knowledge, he derived the first rigorous form of the

uncertainty principle The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which certain pairs of physical properties, such as position a ...

and fully solved several simple quantum mechanics problems for the first time. In 1926, he was appointed professor of physics at Cornell, which he remained until 1946. In 1941, still at Cornell, he became a part-time consultant at the David Taylor Model Basin (DTMB), the

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

modelling facility. In the period 1946–49 he was the head of the hydromechanics laboratory, and from 1950 until 1957 he was head of the structural mechanics laboratory. From 1957 until his retirement in 1960 he was a general scientific consultant to the commanding officer of the DTMB. Also after his retirement he continued to work for the DTMB under contract. Much of his research for the Navy focussed on

hydrodynamics In physics, physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids – liquids and gases. It has several subdisciplines, including (the study of air and other gases in ...

and elasticity, in particular on the theory of

potential flow In fluid dynamics, potential flow or irrotational flow refers to a description of a fluid flow with no vorticity in it. Such a description typically arises in the limit of vanishing viscosity, i.e., for an inviscid fluid and with no vorticity pre ...

, the physics of

underwater explosion An underwater explosion (also known as an UNDEX) is a explosive material, chemical or nuclear explosive, nuclear explosion that occurs under the surface of a body of water. While useful in anti-ship and submarine warfare, underwater bombs are not ...

s and structural

vibration Vibration () is a mechanical phenomenon whereby oscillations occur about an equilibrium point. Vibration may be deterministic if the oscillations can be characterised precisely (e.g. the periodic motion of a pendulum), or random if the os ...

s. In 2018, more than 90 years after its prediction by Kennard, the first experimental observation of Kennard phase was achieved by a collaboration of researchers from Israeli, German, and American universities.

Bibliography

* * Originally by Richtmyer in 1928. Also the 1934, 1942, and 1955 editions are co-authored with Kennard (and later also with T. Lauritsen and J.N. Cooper).

Notes

References

External links

* *

Archival collections

Earle H. Kennard papers, 1912-1967, Niels Bohr Library & Archives
Cornell University faculty Fluid dynamicists 1885 births 1968 deaths Pomona College alumni {{physicist-stub