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Joule-Thomson effect

[jool-tom-suh n, joul-]
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noun Thermodynamics.
  1. the change of temperature that a gas exhibits during a throttling process, shown by passing the gas through a small aperture or porous plug into a region of low pressure.
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Compare free expansion.

Origin of Joule-Thomson effect

1895–1900; named after J. P. Joule and Sir W. Thomson
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for joule-thomson effect

Joule-Thomson effect

noun
  1. a change in temperature of a thermally insulated gas when it is forced through a small hole or a porous material. For each gas there is a temperature of inversion above which the change is positive and below which it is negativeAlso called: Joule-Kelvin effect
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Word Origin

C20: named after James Prescott Joule and Sir William Thomson, 1st Baron Kelvin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012