Table 4 presents the results fitted to the mathematical model of the
Fick's Law for the seven drying tests along with the values of [R.
8,9) In this study,
Fick's law of diffusion, with cyclical water concentrations applied to the exposed coating surface, is solved using Laplace transforms followed by time step rescaling to predict the asymptotic water concentration at the coating-metal interface based on the physical constants of the coating and the parameters of the accelerated weathering protocol.
This can be done by replacing plasma/nuclear membranes using membrane flux technique employing
Fick's law of diffusion.
Fick's law of diffusion--analogous to the law of conduction heat transfer--states that diffusion proceeds opposite to concentration gradients.
The results show that the diffusional model based on
Fick's law (Equation 2) satisfactorily describes the drying process.
It is also interesting that the increase of carbonation depth calculated according to the
Fick's law (Matousek and Drochytka 1998) is roughly corresponding to the carbonation depths found out in poor quality concretes in the course of the one-year measurement.
The expression of
Fick's law for diffusion out of a sphere with boundary conditions of internal resistance controlling integrated over the volume of the sphere is
The mass transfer rates in such systems are traditionally described by means of the modified
Fick's law [5]:
Unfortunately, this analogy isn't applicable to
Fick's Law because it doesn't consider how much dye diffuses.
Fick's Law of Diffusion is a close analog of the method of Fourier for characterizing and predicting heat flow (3).
What does
Fick's law describe and how is it influenced by soil water content?
How can you use
Fick's law to describe gas transport through soil?
