Kelvin–Helmholtzn.

Brit.

/ˌkɛlvɪnˈhɛlmhɒlts/,

/ˌkɛlvɪnˈhɛlmhəʊlts/, U.S.

/ˌkɛlv(ə)nˈhɛlmˌ(h)oʊlts/

Origin: From proper names. Etymons: proper name Kelvin, Helmholtz.

Etymology: < the title of Lord Kelvin (see Kelvin n.) + the name of H. L. F. von Helmholtz (see Helmholtz n.).So called with reference to work published by Helmholtz 1868, in Philos. Mag. 36 337, and by Lord Kelvin (as W. Thomson) 1871, in Philos. Mag. 42 362.

Physics.

attributive. Designating the instability of an interface between two fluids in relative motion, and associated phenomena.

ΚΠ

1947 Jrnl. Marine Res. 6 203 An explanation may be found in the Kelvin-Helmholtz instability criterion.

1961 S. Chandrasekhar Hydrodynamic & Hydromagnetic Stability x. 481 (heading) The stability of superposed fluids: the Kelvin–Helmholtz instability.

1970 Sci. News 97 622/2 These amplifying unstable [atmospheric] waves..are clearly what are called Kelvin-Helmholtz waves. They occur when the wind shear across a stable layer is sufficient to shear off the crests relative to the troughs.

1975 Proc. Royal Soc. A. 347 6 The ‘flicker’ noise observed in..thermionic devices with a superimposed line spectrum arising from Kelvin–Helmholtz instabilities driven by the column rotation.

1999 P. Ball Self-made Tapestry vii. 185 (caption) Structures like those in the second and third frames have been seen in cloud formations, owing to the Kelvin–Helmholtz instability in atmospheric flows.

2007 Astron. & Geophysics Feb. 7/1 Reconnection inside Kelvin–Helmholtz instabilities allows cooler denser plasma from the solar wind to reach..the inner regions of the Earth's magnetic field.

This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022).

单词	kelvin–helmholtz
释义	Kelvin–Helmholtzn. Brit. /ˌkɛlvɪnˈhɛlmhɒlts/, /ˌkɛlvɪnˈhɛlmhəʊlts/, U.S. /ˌkɛlv(ə)nˈhɛlmˌ(h)oʊlts/ Origin: From proper names. Etymons: proper name Kelvin, Helmholtz. Etymology: < the title of Lord Kelvin (see Kelvin n.) + the name of H. L. F. von Helmholtz (see Helmholtz n.).So called with reference to work published by Helmholtz 1868, in Philos. Mag. 36 337, and by Lord Kelvin (as W. Thomson) 1871, in Philos. Mag. 42 362. Physics. attributive. Designating the instability of an interface between two fluids in relative motion, and associated phenomena. ΚΠ 1947 Jrnl. Marine Res. 6 203 An explanation may be found in the Kelvin-Helmholtz instability criterion. 1961 S. Chandrasekhar Hydrodynamic & Hydromagnetic Stability x. 481 (heading) The stability of superposed fluids: the Kelvin–Helmholtz instability. 1970 Sci. News 97 622/2 These amplifying unstable [atmospheric] waves..are clearly what are called Kelvin-Helmholtz waves. They occur when the wind shear across a stable layer is sufficient to shear off the crests relative to the troughs. 1975 Proc. Royal Soc. A. 347 6 The ‘flicker’ noise observed in..thermionic devices with a superimposed line spectrum arising from Kelvin–Helmholtz instabilities driven by the column rotation. 1999 P. Ball Self-made Tapestry vii. 185 (caption) Structures like those in the second and third frames have been seen in cloud formations, owing to the Kelvin–Helmholtz instability in atmospheric flows. 2007 Astron. & Geophysics Feb. 7/1 Reconnection inside Kelvin–Helmholtz instabilities allows cooler denser plasma from the solar wind to reach..the inner regions of the Earth's magnetic field. This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022). < n.1947
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