Peclet numbern.

Brit.

/ˈpɛkleɪ ˌnʌmbə/, U.S.

/pəˈkleɪ ˌnəmbər/

Forms: 1900s– Peclet number, 1900s– Péclet number.

Origin: From a proper name, combined with an English element. Etymons: proper name Péclet , number n.

Etymology: < the name of J. C. E. Péclet (1793–1857), French physicist (adopted in this context by H. Gröber Die Grundgesetze der Wärmeleitung u. des Wärmeüberganges (1921) ii. 168) + number n.

Physics.

A dimensionless parameter used in calculations of heat transfer between a moving fluid and a solid body, representing the ratio of the convected to the conducted heat and equal to the product of the Reynolds number and the Prandtl number, viz. Dvc_p/k, where D is a characteristic length of the body, v is the speed of the fluid past it, c_p is the heat capacity of unit volume of the fluid at constant pressure, and k is its thermal conductivity. Abbreviated Pe.

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Peclet number1933

1933 W. H. McAdams Heat Transmission vii. 173 Equations of this form, expressing hD/k in terms of the Peclet number DGc_p/k are used by many German writers such as Nusselt and Grober.

1956 S. Glasstone Princ. Nucl. Reactor Engin. xi. 679 For the correlation of heat-transfer data it is now appropriate to use another dimensionless modulus, namely, the Peclet number, Pe.

1991 Acta Metallurgica et Materialia 39 2932/1 The importance of the convective mass transport process relative to the diffusive mass transport process scales with the magnitude of the Peclet number Pe.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	peclet number
释义	Peclet numbern. Brit. /ˈpɛkleɪ ˌnʌmbə/, U.S. /pəˈkleɪ ˌnəmbər/ Forms: 1900s– Peclet number, 1900s– Péclet number. Origin: From a proper name, combined with an English element. Etymons: proper name Péclet , number n. Etymology: < the name of J. C. E. Péclet (1793–1857), French physicist (adopted in this context by H. Gröber Die Grundgesetze der Wärmeleitung u. des Wärmeüberganges (1921) ii. 168) + number n. Physics. A dimensionless parameter used in calculations of heat transfer between a moving fluid and a solid body, representing the ratio of the convected to the conducted heat and equal to the product of the Reynolds number and the Prandtl number, viz. Dvc_p/k, where D is a characteristic length of the body, v is the speed of the fluid past it, c_p is the heat capacity of unit volume of the fluid at constant pressure, and k is its thermal conductivity. Abbreviated Pe. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [noun] > Peclet number Peclet number1933 1933 W. H. McAdams Heat Transmission vii. 173 Equations of this form, expressing hD/k in terms of the Peclet number DGc_p/k are used by many German writers such as Nusselt and Grober. 1956 S. Glasstone Princ. Nucl. Reactor Engin. xi. 679 For the correlation of heat-transfer data it is now appropriate to use another dimensionless modulus, namely, the Peclet number, Pe. 1991 Acta Metallurgica et Materialia 39 2932/1 The importance of the convective mass transport process relative to the diffusive mass transport process scales with the magnitude of the Peclet number Pe. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1933
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