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Calibration of boundary conditions correlated to the diffusivity of chloride ions: An accurate study for random diffusivity
(2022-02-01)
For reinforced concrete (RC) structures, the corrosion of the reinforced steel bars from chloride ions is a periodic risk. The chloride ions diffusion is governed by Fick’ laws, however, these equations can be applied under ...
Chloride diffusion assessment in RC structures considering the stress-strain state effects and crack width influences
(2019-03-20)
The aim of this study is to investigate the chloride ions diffusion in sound and cracked concrete under compressive loads. The model includes the analytical setup and data analyses. The governing equations are modified to ...
Stability analysis of Crank-Nicolson and Euler schemes for time-dependent diffusion equations
(Springer, 2015-06-01)
In this paper, we study the stability of the Crank-Nicolson and Euler schemes for time-dependent diffusion coefficient equations on a staggered grid with explicit and implicit approximations to the Dirichlet boundary ...
Rate Constants for Reactions in Viscous Media: Correlation between the Viscosity of the Solvent and the Rate Constant of the Diffusion-Controlled Reactions
(1988)
The kinetics of the quenching of excited pyrene by several molecules in a variety of hydrocarbon solvents and in a diol are reported. The rate constants for reaction of the excited pyrene are, for the most part, ...
Theoretical study of the diffusion of alkali metals on a Cu(111) surface
(Elsevier, 1997)
We present a theoretical study of the diffusion of Li, Na and K on a Cu(111) surface. Various diffusional paths are identified and characterized in terms of kinetic parameters such as diffusion constants and activation ...
2D/3D Numerical Analyses of Corrosion Initiation in RC Structures Accounting Fluctuations of Chloride Ions by External Actions
(2021-06-01)
The diffusion of chloride ions in reinforced concrete (RC) varies in space and time, depending on many uncertain factors as material properties, temperature, aging, humidity and external loadings. In this paper, the goals ...
3 x 3 Lotka-Volterra competition systems with cross-diffusion
(2000)
In this paper we investigate the role of cross-diffusion in the 3 x 3 Lotka-Volterra competition model. Of particular interest is the existence of non-constant steady states created by cross-diffusion in 3 X 3 systems. A ...
Knudsen Gas in a Finite Random Tube: Transport Diffusion and First Passage Properties
(SpringerNew YorkEUA, 2010)
Diffusion controlled LHHW kinetics. Simultaneous determination of chemical kinetic and equilibrium adsorption constants by using the Weisz-Prater approach
(Pergamon-Elsevier Science Ltd, 2017-11)
A method to simultaneously determine the chemical kinetics (kCT) and Langmuir’s adsorption equilibrium (KL) constants in porous catalyst particles where chemical reactions following Langmuir-Hinshel wood-Hougen-Watson ...