Bagnold, Ralph A.

Bagnold, Ralph A.

▪ British geologist
in full  Ralph Alger Bagnold  
born April 3, 1896, Devonport, Devonshire, Eng.
died May 28, 1990

      English geologist who was a leading authority on the mechanics of sediment transport and on eolian (wind-effect) processes.

      Educated at the Royal Military Academy at Woolwich, Bagnold served in the army from 1915 to 1935 and from 1939 to 1944, rising to the rank of brigadier. He organized and led numerous desert explorations—particularly of the Libyan Desert—from 1929 to 1938. He researched the processes of sediment transport by wind and water and studied the origins of sand dunes, classifying dunes according to shape and method of growth. He served as a consultant and adviser to private industry, governments, and scientific study organizations. Bagnold's published works include Libyan Sands (1935), Movement of Desert Sand (1936), Physics of Blown Sand and Desert Dunes (1941), Motion of Waves in Shallow Water (1946), and Flow of Cohesionless Grains in Fluids (1956).

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Universalium. 2010.

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  • Ralph Alger Bagnold — Ralph Alger Bagnold, FRS (* 3. April 1896; † 28. Mai 1990), war der Gründer und erste Kommandeur der Long Range Desert Group der British Army im Zweiten Weltkrieg. Er wird wegen seiner Aktivitäten in den 1930er Jahren als Pionier der… …   Deutsch Wikipedia

  • Bagnold — is a surname, shared by the following individuals:* Enid Bagnold, author and playwright * Millicent Bagnold, character in the Harry Potter books * Ralph Alger Bagnold, British Army Officer **Bagnold number and Bagnold formula, both named after… …   Wikipedia

  • Ralph A. Bagnold — Ralph Alger Bagnold (1896 1990,OBE) est un général de brigade (Brigadier) honoraire (en 1944). Officier du Génie (Royal Engineers), Ralph Bagnold combat sur le front occidental pendant la Première guerre mondiale. Ingénieur diplômé de l… …   Wikipédia en Français

  • Bagnold — ist der Familienname folgender Personen: Enid Bagnold, Lady Jones (1889–1981), britische Schriftstellerin und Dramatikerin Ralph Alger Bagnold (1896–1990), Gründer und erste Kommandeur der Long Range Desert Group der British Army im 2. Weltkrieg… …   Deutsch Wikipedia

  • Ralph Alger Bagnold — Infobox Person name = Ralph Alger Bagnold birth name = birth date = April 3 1896 birth place = death date = May 28 1990 death place = death cause = resting place = residence = nationality = other names = known for = desert exploration education …   Wikipedia

  • Bagnold formula — The Bagnold formula, named after Ralph Alger Bagnold, relates the amount of sand moved by the wind to wind speed by saltation. It states that the mass transport of sand is proportional to the third power of the friction velocity. Under steady… …   Wikipedia

  • Bagnold number — The Bagnold number, named after Ralph Alger Bagnold, used in granular flow calculations, is defined by: Ba=frac{mD^2gamma}{2gamma emu}where m is the mass, D is the grain diameter, gamma is the surface tension and mu is the interstitial fluid… …   Wikipedia

  • Bagnold — This interesting and unusual surname is of Anglo Saxon origin, and is a locational name from a place so called in Staffordshire, which was recorded as Badegenhall in 1273, in the Assize Rolls. The placename is composed of the Olde English… …   Surnames reference

  • Enid Bagnold — Enid Bagnold, Lady Jones, CBE (27 October 1889 ndash; 31 March 1981), known by her maiden name as Enid Algerine Bagnold, was a British author and playwright, best known for the 1935 story National Velvet which was filmed in 1944 with Elizabeth… …   Wikipedia

  • Nombre de Bagnold — Le nombre de Bagnold (Ba) est un nombre sans dimension utilisé en rhéologie. Il est utilisé pour caractériser l écoulement de grains de sable et permet notamment de déterminer à partir de quelles conditions l écoulement passe d un fluide à seuil… …   Wikipédia en Français

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