Nonlinear Diffusion Behavior for the Prussian Blue Electrode: I. Variable Diffusivity Revealed by Potentiostatic Intermittent Titration Technique-Chronoabsorptometry

2001 ◽  
Vol 148 (6) ◽  
pp. E282 ◽  
Author(s):  
Lin-Chi Chen ◽  
Kuo-Chuan Ho
Keyword(s):  
Prussian Blue ◽  
Nonlinear Diffusion ◽  
Diffusion Behavior ◽  
Variable Diffusivity ◽  
Titration Technique ◽  
Potentiostatic Intermittent Titration Technique

Numerical Solution of a Nonlinear Diffusion Model for Soybean Hydration with Moving Boundary

2015 ◽  
Vol 11 (5) ◽  
pp. 587-595 ◽  
Author(s):  
Douglas J. Nicolin ◽  
Gisleine E. C. da Silva ◽  
Regina Maria M. Jorge ◽  
Luiz Mario M. Jorge
Keyword(s):  
Differential Equation ◽  
Diffusion Model ◽  
Nonlinear Diffusion ◽  
Numerical Scheme ◽  
Moving Boundary ◽  
Grid Method ◽  
Variable Diffusivity ◽  
Variable Space ◽  
Diffusive Fluxes ◽  
Moisture Profiles

Abstract Variable diffusivity and volume of the grains are taken into account in the diffusion model that describes mass transfer in soybean hydration. The variable space grid method (VSGM) was used to consider the increase in grain size, and the diffusivity was considered an exponential function of the moisture content. An equation for the behavior of the grain radius as a function of time was obtained by global mass balance over the soybean grain and the differential equation considered that the increase in radius happens due to the influence of the convective and diffusive fluxes at the surface of the grains. The model was solved by an explicit numerical scheme which presented satisfactory results. The results showed the behavior of moisture profiles obtained as a function of time and radial position and also showed how the grain radius increased with time and changed the solution domain of the diffusion equation.

Li-ion diffusion behavior in Sn, SnO and SnO2 thin films studied by galvanostatic intermittent titration technique

2010 ◽  
Vol 181 (35-36) ◽  
pp. 1611-1615 ◽  
Author(s):  
J. Xie ◽  
N. Imanishi ◽  
A. Hirano ◽  
Y. Takeda ◽  
O. Yamamoto ◽  
...  
Keyword(s):  
Thin Films ◽  
Ion Diffusion ◽  
Diffusion Behavior ◽  
Galvanostatic Intermittent Titration Technique ◽  
Li Ion ◽  
Sno2 Thin Films ◽  
Titration Technique

Potentiostatic Intermittent Titration Technique for Electrodes Governed by Diffusion and Interfacial Reaction

2011 ◽  
Vol 116 (1) ◽  
pp. 1472-1478 ◽  
Author(s):  
Juchuan Li ◽  
Xingcheng Xiao ◽  
Fuqian Yang ◽  
Mark W. Verbrugge ◽  
Yang-Tse Cheng
Keyword(s):  
Interfacial Reaction ◽  
Titration Technique ◽  
Potentiostatic Intermittent Titration Technique

Moisture Diffusion in Fiber Reinforced Plastics

1976 ◽  
Vol 98 (1) ◽  
pp. 92-95 ◽  
Author(s):  
E. L. McKague ◽  
J. D. Reynolds ◽  
J. E. Halkias
Keyword(s):  
Relative Humidity ◽  
Material Properties ◽  
Nonlinear Diffusion ◽  
Moisture Absorption ◽  
Moisture Diffusion ◽  
Fiber Reinforced ◽  
Diffusion Behavior ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Diffusion Rates

Fiber-reinforced epoxy laminates were exposed to several combinations of temperature and relative humidity. The purpose was to determine rates and extent of moisture absorption. Diffusion rates varied with temperature, and equilibrium moisture contents varied with relative humidity. Data analysis provided values for the material properties that determined diffusion behavior. A nonlinear diffusion model containing these values was shown to describe and predict absorption behavior for any combination of temperature and humidity. The model also describes desorption and correlates well with experimental data from changing humidity conditions.

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