| 单词 | Poiseuille |
| 释义 | Poiseuille Physics.|pwazøj|
The name of J. L. M. Poiseuille (1799–1869), French physiologist, used attrib. and in the possessive to designate concepts and phenomena related to his work on fluid flow, as Poiseuille('s) equation, expression, formula, or law, the relation between the volume V of fluid flowing per second through a long cylinder of length l and radius r under conditions of Poiseuille flow, viz. V = πr4p/8ηl, where p is the pressure drop along the cylinder and η is the viscosity of the fluid (given by Poiseuille in Compt. Rend. (1840) XI. 1047, (1841) XII. 114); Poiseuille flow, laminar flow of a viscous fluid of negligible compressibility, esp. through a long, narrow cylinder.
1883Phil. Trans. R. Soc. CLXXIV. 946 The discharge from the pipes agreed exactly with those given by Poiseuille's formula for capillary tubes. Ibid. 981 With all the smaller tubes Poiseuille's law held throughout his experiments. 1931G. Barr Monogr. of Viscometry ii. 24 Let the viscosity..calculated from an experiment by means of the uncorrected Poiseuille equation be denoted by η′. 1946Q. of Applied Math. III. 119 The Poiseuille flow in a circular pipe was studied..with a conclusion of stability. 1958Condon & Odishaw Handbk. Physics v. vi. 78/1 Viscous, laminar flow of gases through cylindrical tubes is governed by Poiseuille's law. 1967Margerison & East Introd. Polymer Chem. ii. 103 In these viscometers the time taken for the level of solvent or solution to pass between two fixed marks is determined and this is related to the viscosity by Poiseuille's equation. 1975Jrnl. Surg. Res. XIX. 26/1 The resistance of varying degrees of obstruction placed within the circumflex coronary artery was determined by employing Poiseuille's Law. 1975Microvascular Res. X. 153 In vivo RBC [sc. red blood cell] velocity profiles for mammalian arterioles and venules..are time variant and more blunted than would be anticipated for Poiseuille flow. |
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