Reaction Model for Iron Dissolution Studied by Electrode Impedance: I . Experimental Results and Reaction Model

1981 ◽  
Vol 128 (2) ◽  
pp. 257-266 ◽  
Author(s):  
Michel Keddam ◽  
Oscar Rosa Mottos ◽  
Hisasi Takenouti
Keyword(s):  
Reaction Model ◽  
Experimental Results ◽  
Electrode Impedance ◽  
Iron Dissolution

scholarly journals Numerical Model of Radical Photopolymerization Based on Interdiffusion

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Shuhei Yoshida ◽  
Yosuke Takahata ◽  
Shuma Horiuchi ◽  
Hiroyuki Kurata ◽  
Manabu Yamamoto
Keyword(s):  
Diffusion Coefficient ◽  
Numerical Model ◽  
Reaction Rate ◽  
Beam Propagation Method ◽  
Reaction Model ◽  
Experimental Results ◽  
Hologram Recording ◽  
Elementary Reactions ◽  
Proposed Model ◽  
And Diffusion

An accurate reaction model is required to analyze the characteristics of photopolymers. For this purpose, we propose a numerical model for radical photopolymerization. In the proposed model, elementary reactions such as initiation, propagation, and termination are considered, and we assume interdiffusion for each component in the material. We analyzed the diffraction characteristics of a radical photopolymer based on the proposed interdiffusion model with the beam propagation method. Moreover, we also performed hologram-recording experiments and evaluated the diffraction characteristics of the photopolymer medium. By comparing the numerical and experimental results, medium parameters such as reaction rate and diffusion coefficient can be estimated. We confirmed that the interdiffusion model can reproduce the experimental results and showed that the medium parameters affect the diffraction characteristics.

Development and exploitation of a multipurpose CFD tool for optimisation of microbial reaction and sludge flow

2006 ◽  
Vol 53 (3) ◽  
pp. 101-110 ◽  
Author(s):  
T. Oda ◽  
T. Yano ◽  
Y. Niboshi
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Numerical Models ◽  
Numerical Technique ◽  
Turbulence Models ◽  
Reaction Model ◽  
Experimental Results ◽  
Navier Stokes ◽  
Transfer Model ◽  
The Right

A numerical analysis technique for optimisation of microbial reaction and sludge flow has been developed in this study. The technique is based on the 3D multiphase Navier–Stokes solver with turbulence models. In order to make numerical analyses of the total processes in wastewater treatment plants possible, four numerical models, the microbial reaction model, a sludge settling model, oxygen mass transfer model from coarse bubbles, and a model from fine bubbles, are added to the solver. All parameters included in those models are calibrated in accordance with experimental results, and good agreements between calculated results and experimental results are found. Finally, this study shows that the numerical technique can be used to optimise wastewater treatment plants with an example of the operational optimisation of an intermittent agitation in anoxic reactors by coarse bubbles. With a proper appreciation of its limit and advantages, the exploitation of the CFD efficiently leads us to the right direction even though it is not quantitatively perfect.

Modified Line-of-Sight Model for Deposition of Tungsten Silicide Barrier Layers

1990 ◽  
Vol 181 ◽  
Author(s):  
Timothy S. Cale ◽  
Gregory B. Raupp
Keyword(s):  
Qualitative Agreement ◽  
Quantitative Agreement ◽  
Reaction Model ◽  
Experimental Results ◽  
Diffusion Reaction ◽  
Line Of Sight ◽  
Tungsten Silicide ◽  
Barrier Layers ◽  
Nominal Thickness ◽  
Model Predictions

ABSTRACTA modified line-of-sight model for transport and deposition during LPCVD is used to predict step coverage and film composition uniformity of tungsten silicide barrier layers. Predictions are compared with experimental results for 2 μim wide by 6 μm deep trenches with barrier layers of 0.2 μm nominal thickness. Model predictions are in quantitative agreement with those of a diffusion-reaction model and are in qualitative agreement with experiment.

The Kinetic Analysis of Biomass Burning Based on Two-Component Reaction Model

2012 ◽  
Vol 424-425 ◽  
pp. 1301-1304
Author(s):  
Hong Bo Lu ◽  
Ze Hui Wang ◽  
Yu Xin Ma
Keyword(s):  
Kinetic Analysis ◽  
Heating Rate ◽  
Biomass Burning ◽  
Combustion Process ◽  
Reaction Model ◽  
Experimental Results ◽  
Parallel Reaction ◽  
Heating Rates ◽  
Two Component ◽  
Good Agreement

Combustion of sawdust was studied using Pyris-1TGA thermogravimetric apparatus in the heating rates of 20, 40, 60K/min. The combustion process of sawdust includes three steps: losing water, precipitation and combustion of volatile, and carburization. A bicomponent parallel reaction model is created and used to simulate the combustion process of sawdust under the heating rate of 40K/min. Comparison of simulation and experimental results shows that the fitting curves are in good agreement with the experimental results

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