Biot number

(redirected from Biot modulus)

Biot number

[′byō ‚nəm·bər]
(fluid mechanics)
A dimensionless group, used in the study of mass transfer between a fluid and a solid, which gives the ratio of the mass-transfer rate at the interface to the mass-transfer rate in the interior of a solid wall of specified thickness.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
where M (Pa) is Biot modulus, [alpha] is Biot coefficient, and [epsilon] is the mechanical volumetric strain.
If [alpha] is equal to unity, the grains are considered to be incompressible, and the Biot modulus M is equal to [K.sub.f]/n.
(i) The constant M is sometimes called the Biot modulus. The constant [alpha] is known as the ratio of the fluid volume gained (or lost) in a material element to the volume change of that element, when the pore pressure is allowed to return to its initial state and it varies between 0 and 1.