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boundary layer

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noun Physics.
the portion of a fluid flowing past a body that is in the immediate vicinity of the body and that has a reduced flow due to the forces of adhesion and viscosity.
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Origin of boundary layer

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use boundary layer in a sentence

  • From the amount of iridium found in the boundary layer, Walter Alvarez’s father Luis Alvarez, a Manhattan Project veteran and Nobel Prize-winning physicist, calculated the size of an asteroid that would be necessary to coat the globe in iridium.

British Dictionary definitions for boundary layer

boundary layer

noun
the layer of fluid closest to the surface of a solid past which the fluid flows: it has a lower rate of flow than the bulk of the fluid because of its adhesion to the solid
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
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