a CGS unit of permeability. Permeability is the extent to which a solid allows the flow of a fluid. This flow depends on the properties of the solid and also on the dynamic viscosity of the fluid and the difference in pressure driving the flow. One darcy is the permeability of a solid through which one cubic centimeter of fluid, having a viscosity of one centipoise, will flow in one second through a section one centimeter thick and one square centimeter in cross section, if the pressure difference between the two sides of the solid is one atmosphere. It turns out that permeability has the same units as area; since there is no SI unit of permeability, square meters are used. One darcy is equal to about 0.98692 x 10-12 square meter. The unit is named for a French scientist, H. Darcy (1803-1858), who did pioneering work in the study of permeability.

Dictionary of units of measurement. 2015.

Look at other dictionaries:

  • Darcy — ist der Familienname folgender Personen: Georgine Darcy (1931–2004), US amerikanische Schauspielerin Henry Darcy (1803–1858), französischer Ingenieur Les Darcy (1895–1917), australischer Boxer Sheila Darcy (1914–2004), US amerikanische… …   Deutsch Wikipedia

  • Darcy — m English: transferred use of the surname, originally a Norman baronial name (d Arcy) borne by a family who came from Arcy in northern France. It has always retained a somewhat aristocratic flavour, which has enhanced its popularity as a given… …   First names dictionary

  • darcy — ● darcy nom masculin (de W. K. D Arcy, nom propre) Unité de perméabilité équivalant à 0,987 μm2 …   Encyclopédie Universelle

  • Darcy — Désigne celui qui habite une localité appelée Arcy, Arsy, ou qui en est originaire. Surtout porté dans le Pas de Calais, il peut renvoyer soit à un hameau de ce département, soit à Arsy (60) soit encore à Arcy Sainte Restitue (02). Variantes :… …   Noms de famille

  • Darcy — For the 19th century French scientist, see Henry Darcy. This article is about the unit of fluid permeability. For other uses, see Darcy (disambiguation). A darcy (or darcy unit) and millidarcy (mD) are units of permeability, named after Henry… …   Wikipedia

  • Darcy — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Darcy peut faire référence à : Henry Darcy, hydraulicien français ; sont nommés en son honneur : La loi de Darcy L Équation de Darcy… …   Wikipédia en Français

  • Darcy — /ˈdasi/ (say dahsee) noun (James) Les(lie), 1895–1917, Australian champion boxer. Les Darcy was born near Maitland, NSW. Apprenticed to a blacksmith, he developed an ideal physique for boxing, and rose rapidly in professional boxing ranks,… …   Australian-English dictionary

  • Darcy — Dar|cy [dar si; nach dem frz. Ingenieur H. P. G. Darcy (1803–1858)], das; s; Einheitenzeichen: d, D: amer. Einheit (9,87 · 10‒9 cm2) für die Durchlässigkeit poröser Gesteinsschichten für Erdöl. Allg. beschreibt das Darcy Gesetz Zusammenhänge… …   Universal-Lexikon

  • Darcy — This famous surname recorded in many forms including Arcy, d Arcy, d Arcey, Darcy, Darcey, Dorcey, Dorcy, Dorsey, D orsay, Orsay, and Orsi, is usually of French locational origins, although Irish names may have a different root. The French forms… …   Surnames reference

  • darcy — darsis statusas T sritis Standartizacija ir metrologija apibrėžtis Nesisteminis dirvos ir uolienų vandens pralaidumo matavimo vienetas. Žymimas d: 1 d = 0,9869 · 10⁻¹² m². atitikmenys: angl. darcy rus. дарси, f pranc. darcy, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”