diffusivity

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diffusivity

[dif·yü′ziv·əd·ē]
(thermodynamics)
The quantity of heat passing normally through a unit area per unit time divided by the product of specific heat, density, and temperature gradient. Also known as thermal diffusivity; thermometric conductivity.
References in periodicals archive ?
Diffusivities of the desorption and reabsorption processes are the same, and both are higher than that of the absorption process (Table 1).
Using the transition point as the only tool for establishing the initial profile may result in an overestimation of diffusivities, thus giving shorter predicted lifetimes.
Zero concentration diffusivities for water are presented in Fig.
It is important to note that the diffusivities for the outer pipe wall, when using 4516 h and 6260 h as the initial profiles, are reversed.
In sorption experiments, diffusivities are most conveniently determined from the half-sorption time, [t.
As described in the Experimental section, the diffusivities of polymer samples may be determined through absorption and desorption tests.
The desorption diffusivities were about an order of magnitude higher than the sorption diffusivities obtained from the immersion experiments with the thin films (Table 2).
The design of this equipment is based on the correct estimation of diffusivities of the organic volatiles in the polymer phase, since most of the mass transfer resistance is located in the solid phase rather than in the gas phase.
The contributors compare and assess diffusion data from the literature for all elements in minerals and natural melts and provide equations to evaluate diffusivities under different conditions.
The analytical gas transport equation (equation 8) results for radon, using specific diffusivities ([10.