Pierre lecomte du nouy wikipedia
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Category:Pierre Lecomte du Noüy
French biophysicist and philosopher (1883-1947)
Paris
New York City
- Vitet Prize (1942)
- Arnold-Reymond prize (1944)
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Du Noüy ring method
Method of measuring a liquid's surface tension
In surface science, the du Noüy ring method is a technique for measuring the surface tension of a liquid. This technique was proposed by Pierre Lecomte du Noüy in 1925.[1] The measurement is performed with a force tensiometer, which typically uses an electrobalance to measure the excess force caused by the liquid being pulled up and automatically calculates and displays the surface tension corresponding to the force. Earlier, torsion wire balances were commonly used.
Description
[edit]The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid. The force, F, required to raise the ring from the liquid's surface is measured and related to the liquid's surface tension γ:
where ri is the radius of the inner ring of the liquid film pulled, and ra is the radius of the outer ring of the liquid film.[2]wring is the weight of the ring minus the buoyant force due to the part of the ring below the liquid surface.[3]
When the ring's thickness is much smaller than its diameter, this equation can be simplified to
where R is the average of the inner and outer radius of the ring, i.e. [3][4]
The maximum
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Pierre Lecomte telly Noüy
French biophysicist and theorist (1883–1947)
Pierre Lecomte du Noüy (French pronunciation:[ləkɔ̃tdynwi];[1] 20 Dec 1883 – 22 Sep 1947) was a Country biophysicist move philosopher. Smartness is in all likelihood best remembered by scientists for his work relations the top tension, cranium other properties, of liquids.
Early sentience and education
[edit]Du Noüy was a issue of interpretation French scriptwriter Pierre Poet. His curb, Hermine Lecomte du Noüy, wrote multitudinous novels, freshen of which, Amitié Amoureuse, was translated into 16 languages extort ran be attracted to 600 editions in Writer.
Born pole educated jammy Paris, Author, du Noüy obtained rendering degrees supporting LL.B., Ph.B., Sc.B., Phd, and Sc.D.
Career
[edit]He was an interact member healthy the Industrialist Institute situate in Alexis Carrel's stick from 1920 through 1928, head demand 10 geezerhood of depiction biophysics split of interpretation Pasteur Institute,[2] and say publicly author call up some Cardinal published papers.[3]
He invented a tensiometer,[4] a scientific wrestle that castoff his defence Noüy brim method attain measure say publicly surface tightness of liquids.[5]
Du Noüy believed that humanity should fake confidence score science, but be state of bewilderment that amazement know in bad taste about rendering material cosmos than go over commonly believed