A diffusion coefficient in chemistry refers to the proportionality constant between a mass flux and a driving force. It is a measure of the diffusion process in a binary system and depends on the thermodynamic state of the fluid. AI generated definition based on: Reference Module in Chemistry, ...
In the formulation presented in this work, the diffusion coefficient depends on the mixing length when the mixing length is very small. In calculations with the method of Langer et al., the efficiency factor of the diffusion coefficient of chemical species is sometimes much smaller than 1. This...
diffusion coefficient：扩散系数,弥散系数。例句：The impurity concentration profile depends on epitaxy growth velocity, growth time and impurity diffusion coefficient.如果杂质的扩散系数很小，杂质在外延层中的深度分布是均匀的。扩散，传播合作的，共同作用的
by [54]. Generally, the water vapor diffusion coefficient depends on the actual concrete mix composition, microstructure and boundary conditions (mainly humidity and temperature). Bazant and Najjar [55] found that the water diffusion coefficient decreased by 10 to 20 times when relative pore ...
Error expressions derived from the commonly used equations of electroanalytical chemistry using Taylor''s series show how a calculated value of n, the number of electrons transferred, depends on the error in D, the diffusion coefficient. The error relationships for chronoamperometry, polarography, ...
In the case when\({D}_{1,\,{z}_{{i}_{1}}}\)is uncorrelated with\({z}_{{i}_{2}}\)and\({D}_{1,\,{z}_{{i}_{2}}}\)uncorrelated with\({z}_{{i}_{1}}\), then the growth of the variance only depends on the diffusion coefficient. ...
In this model the effective kinetic coefficient depends on the kinetic coefficients in each of the phases, volumetric particle phases and additional free parameter, which generally characterizes the type of structure of a bi-phase zone. It is shown that the combined model is constructed to describe...
美 英 un.扩散系数;扩散率 英汉 网络释义 un. 1. 扩散系数 2. 扩散率 释义: 全部,扩散系数,扩散率
Note that the equation relates the first time derivative to the second space derivative and that the diffusion coefficient has units of m2s-1. According to these dimensions, we can infer a relationship between the spatial and temporal extent of diffusion: ...
However, the porosity test method can determine the diffusion coefficient based on the porous material microstructure. For the first time, this method was developed by Carniglia (1986) to obtain the effective diffusivity of gaseous species in oxidants and catalysts. And then, it was later employed...