diffusion constant

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dif·fu·sion co·ef·fi·cient

the mass of material diffusing across a unit area in unit time under a concentration gradient of unity.
Synonym(s): diffusion constant

diffusion constant

a mathematical constant relating to the ability of a substance to spread widely.
References in periodicals archive ?
Jayas, "On the diffusion constant of water in wheat," J.
Figure 4 shows the diffusion constant for the cases of soil perpendicular or parallel plowing to the contour lines, and for three plow depths.
The fitting of diffusion constants has the advantage that the values can be compared with measurements made during studies on soil constituents.
where F is the fractional attainment of equilibrium and is the ratio of the amount adsorbed after time t, to the amount adsorbed at equilibrium and k is a diffusion constant.
A new nonlinear Schrodinger equation is obtained explicitly from the (fractal) Brownian motion of a massive particle with a complex-valued diffusion constant.
Permeability (P) was found using an isostatic test procedure while the diffusion constant (D) was found using the half-time method.
Jud (12) reported that the diffusion constant can be represented by an Arrhenius law of diffusion as defined in Eq.
If the thin films of fouling microorganisms that are common on egg masses have large effects on oxygen supply, then scaling of egg masses is sensitive to fouling and light intensities as well as to such internal constraints as the concentration of embryos, oxygen consumption by embryos, and the diffusion constant for oxygen.
As the melt cools down, melt properties such as density, Henry's law constant, surface tension, and diffusion constant change.
Michaels (31) found a relationship between the reduced diffusion constant and the reduced molecular diameter for amorphous polyethylene:

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