In this model the diffusion constant
, D, or more accurately the diffusion coefficient, is assumed constant throughout the decomposition.
The fitting of diffusion constants
has the advantage that the values can be compared with measurements made during studies on soil constituents.
The contents of this work are the following: In section 2 we derive the nonlinear Schrodinger equation by extending Nottale-Ord's approach to the case of a fractal Brownian motion with a complex 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.
As the melt cools down, melt properties such as density, Henry's law constant, surface tension, and diffusion constant
0] is the diffusion constant
, R the universal gas constant, and T the absolute temperature.
The relevant diffusion constant
data for this polymer couple are presented in Table 1.
Michaels (31) found a relationship between the reduced diffusion constant
and the reduced molecular diameter for amorphous polyethylene:
The relation between the viscosity and the self diffusion constant
As molecular weight increases the diffusion constant
, U, also increases.
y] are diffusion constants
of employed and unemployed foragers respectively, and f (r, t) is the food landscape.