Darcyn.

Brit.

/ˈdɑːsi/, U.S.

/ˈdɑrsi/

Etymology: < the name of H. P. G. Darcy (1803–58), inspector of the Paris waterworks.

1. Used attributively and in the possessive to designate concepts arising out of Darcy's work on fluid flow, esp. in Darcy's law n. a law governing the flow of fluid through a porous medium, according to which the volume flow per unit cross-sectional area is proportional to the pressure gradient divided by the viscosity of the fluid.

ΘΚΠ

the world > matter > physics > mechanics > dynamics > fluid dynamics > [adjective] > designations of specific concepts

Darcy1881

Venturi1887

non-Newtonian1908

Newtonian1932

the world > matter > physics > mechanics > dynamics > fluid dynamics > [noun] > law or unit of flow through porous medium

Darcy1931

Darcy's law1931

1881 Encycl. Brit. XII. 493/2 (heading) Ganguillet & Kutter's modified Darcy formula.

1931 Physics I. 35 In the case of the flow of liquids through porous media..the empirically established law (D'Arcy law [sic]) that the velocity is proportional to the pressure gradient has been taken as the basis of the hydrodynamics.

1957 Nature 23 Feb. 407/2 The section concerned with underground water devoted most of the sessions to an appreciation of the so-called Darcy's Law and its application and validity over a wide range of ground-water problems.

1972 R. G. Kazmann Mod. Hydrol. (ed. 2) v. 184 It is only in connection with water flow in the vicinity of discharging wells that..the flow is often turbulent, and Darcy's law does not apply.

2. Written darcy (plural darcys, darcies). A c.g.s. unit of permeability to fluid flow, being the permeability of a medium that allows a flow of 1 cubic centimetre per second of a liquid of 1 centipoise viscosity under a pressure gradient of 1 atmosphere/centimetre.

ΚΠ

1933 R. D. Wyckoff et al. in Rev. Sci. Instruments IV. 395/2 In view of Darcy's fundamental work in establishing the laws of flow for porous media it has seemed appropriate to name the unit of permeability the darcy.

1971 Bull. Amer. Assoc. Petroleum Geologists 55 1694/2 Average porosity is about 34%, and average permeability is in excess of 3 darcys.

1975 G. Anderson Coring i. 15 The American Petroleum Institute has modified the darcy to standardize its use for the petroleum industry.

This entry has not yet been fully updated (first published 1989; most recently modified version published online March 2022).

单词	darcy
释义	Darcyn. Brit. /ˈdɑːsi/, U.S. /ˈdɑrsi/ Etymology: < the name of H. P. G. Darcy (1803–58), inspector of the Paris waterworks. 1. Used attributively and in the possessive to designate concepts arising out of Darcy's work on fluid flow, esp. in Darcy's law n. a law governing the flow of fluid through a porous medium, according to which the volume flow per unit cross-sectional area is proportional to the pressure gradient divided by the viscosity of the fluid. ΘΚΠ the world > matter > physics > mechanics > dynamics > fluid dynamics > [adjective] > designations of specific concepts Darcy1881 Venturi1887 non-Newtonian1908 Newtonian1932 the world > matter > physics > mechanics > dynamics > fluid dynamics > [noun] > law or unit of flow through porous medium Darcy1931 Darcy's law1931 1881 Encycl. Brit. XII. 493/2 (heading) Ganguillet & Kutter's modified Darcy formula. 1931 Physics I. 35 In the case of the flow of liquids through porous media..the empirically established law (D'Arcy law [sic]) that the velocity is proportional to the pressure gradient has been taken as the basis of the hydrodynamics. 1957 Nature 23 Feb. 407/2 The section concerned with underground water devoted most of the sessions to an appreciation of the so-called Darcy's Law and its application and validity over a wide range of ground-water problems. 1972 R. G. Kazmann Mod. Hydrol. (ed. 2) v. 184 It is only in connection with water flow in the vicinity of discharging wells that..the flow is often turbulent, and Darcy's law does not apply. 2. Written darcy (plural darcys, darcies). A c.g.s. unit of permeability to fluid flow, being the permeability of a medium that allows a flow of 1 cubic centimetre per second of a liquid of 1 centipoise viscosity under a pressure gradient of 1 atmosphere/centimetre. ΚΠ 1933 R. D. Wyckoff et al. in Rev. Sci. Instruments IV. 395/2 In view of Darcy's fundamental work in establishing the laws of flow for porous media it has seemed appropriate to name the unit of permeability the darcy. 1971 Bull. Amer. Assoc. Petroleum Geologists 55 1694/2 Average porosity is about 34%, and average permeability is in excess of 3 darcys. 1975 G. Anderson Coring i. 15 The American Petroleum Institute has modified the darcy to standardize its use for the petroleum industry. This entry has not yet been fully updated (first published 1989; most recently modified version published online March 2022). < n.1881
随便看	hypochondriacal hypochondriacally hypochondriacism hypochondriacs hypochondrial hypochondrias hypochondriases hypochondriasis hypochondriasm hypochondriast hypochondriasts hypochondriatic hypochondric i-thank i-thanked i-thave i-thee i-thenche i-thenching i-thole i-thou i-thrast i-tide i-time i-told-you-so