Cellular Automata Diffusion-Kinetic Model of Dendritic Growth

2004 ◽  
pp. 355-364 ◽  
Author(s):  
Andriy Burbelko ◽  
Edward Fraś ◽  
Wojciech Kapturkiewicz ◽  
Ewa Olejnik
Keyword(s):  
Kinetic Model ◽  
Cellular Automata ◽  
Dendritic Growth ◽  
Diffusion Kinetic

Modelling of Dendritic Growth during Unidirectional Solidification by the Method of Cellular Automata

2010 ◽  
Vol 649 ◽  
pp. 217-222 ◽  
Author(s):  
Andriy A. Burbelko ◽  
Edward Fraś ◽  
Wojciech Kapturkiewicz ◽  
Daniel Gurgul
Keyword(s):  
Cellular Automata ◽  
Dendritic Growth ◽  
Solid Phase ◽  
Concentration Field ◽  
Unidirectional Solidification ◽  
Process Conditions ◽  
Component Solution ◽  
Mould Wall ◽  
Temperature Heat ◽  
Wall Zone

Modelling was carried out to investigate the internal dendrite grains structure formation from a liquid two-component solution in the area adjacent to a mould wall. For the simulation, our own model and computer program based on CAFD (Cellular Automata Finite Differences) were used. In modelling, the effect of process conditions and material-related parameters, e.g. nucleation temperature, heat exchange rate, interfacial energy, crystal orientation with respect to the casting wall, etc. on the nature of the dendritic grain growth was examined. It was demonstrated that the profile of concentration field in a near-mould-wall zone impedes the growth of the solid phase in the direct vicinity of the wall. A local melting down of the grains of a solid phase due to the segregation of admixtures reducing the alloy point of liquidus is also possible.

Consecutive hydrogenation of pseudoionon. Application of diffusion kinetic model to predict experimental reactor operation

1985 ◽  
Vol 29 (2) ◽  
pp. 409-415 ◽  
Author(s):  
A. Yermakova ◽  
E. M. Sulman ◽  
O. S. Popov ◽  
O. B. Sannikov ◽  
A. I. Gontar ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Reactor Operation ◽  
Diffusion Kinetic ◽  
Experimental Reactor

Microstructure Development of an Electroplating Coated Nickel-Base SC Superalloy in Oxidation Processes—Simulation Results

2021 ◽  
Author(s):  
Kang Yuan ◽  
Zhaoran Zheng
Keyword(s):  
Kinetic Model ◽  
Single Crystal ◽  
Diffusion Zone ◽  
Microstructure Development ◽  
Diffusion Kinetic ◽  
Oxidation Processes ◽  
Secondary Reaction Zone ◽  
Tcp Phases ◽  
Simulation Results ◽  
Nickel Base

Abstract In this paper; a diffusion kinetic model was applied to simulate the microstructure development in a MCrAlY-superalloy system at high temperatures. Both simulation and experimental results showed that γ+γ’ microstructure was obtained in the coatings due to Al depletion after oxidation. With the help of the modelling; the mechanism of the formation of the diffusion zones in the single crystal (SC) superalloy can be also analyzed. The results revealed that the inward diffusion of Al from coating affected the depth of secondary reaction zone (SRZ) with the precipitation of TCP phases while the depth of inter-diffusion zone (IDZ) was decided by the inward diffusion of Cr.

scholarly journals A reaction–diffusion kinetic model for the heterogeneous N-deacetylation step in chitin material conversion to chitosan in catalytic alkaline solutions

2018 ◽  
Vol 3 (6) ◽  
pp. 920-929 ◽  
Author(s):  
Bojana Bradić ◽  
David Bajec ◽  
Andrej Pohar ◽  
Uroš Novak ◽  
Blaž Likozar
Keyword(s):  
Kinetic Model ◽  
Reaction Diffusion ◽  
Alkaline Solutions ◽  
Diffusion Kinetic ◽  
Mechanistic Insight ◽  
Insight Into

New mechanistic insight into the modelling of the heterogeneous N-deacetylation step of α-chitin, obtained from waste crustacean shells.

General diffusion-kinetic model of metallic oxidation

2002 ◽  
Vol 44 (5) ◽  
pp. 1113-1131 ◽  
Author(s):  
V.V Doilnitsyna
Keyword(s):  
Kinetic Model ◽  
Diffusion Kinetic

scholarly journals Седиментация малоконцентрированной взвести стоксовских частиц в перемешиваемом слое с движущейся свободной границей

2019 ◽  
Vol 89 (8) ◽  
pp. 1150
Author(s):  
А.В. Ряжских
Keyword(s):  
Free Surface ◽  
Kinetic Model ◽  
Dispersed Phase ◽  
Diffusion Kinetic ◽  
Carrier Medium ◽  
Flat Layer

The problem of sedimentation of polydisperse low-concentrated Stokes particles under the conditions of mixing if the carrier medium in a flat layer with a moving free surface is considered using a diffusion-kinetic model of the motion of the dispersed phase in the suspension

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