Chemical Reaction-Diffusion Model Around a Vessel for Studying Temperature and Concentration of Three Chemical Species by Finite Element Method

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Pasha P.; Taghinia F.; Nadalinia Chari F.; Jalili B.; Jalili P.; Domiri Ganji D.

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Journal Paper

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Journal: International Journal of Engineering Year:2023 | Volume:36 | Issue:1 Page(s): 171-181

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Title

Chemical Reaction-Diffusion Model Around a Vessel for Studying Temperature and Concentration of Three Chemical Species by Finite Element Method

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Keywords

Finite element method

Chemical reaction

Diffusion

Arrhenius equations

Abstract

In this paper, the temperature and concentration of species around a vessel using the reaction and Diffusion relations were investigated. The reactions between 3 chemical species, and the relationship between temperature changes and the rate of Chemical reactions were studied. The novelty of this paper is the use of different coefficients of material with Diffusion constants and also considering the concentration and temperature of materials involved in the reaction with non-heat sources and with heat source modes. So that showed the concentration and heat transfer rate of substances involved in the Chemical reactions in the form of two-dimensional and three-dimensional diagrams about their distance from the borders of the vessel. The Finite element method is utilized for calculated differential equations. According to the results obtained, when the temperature of the reactants increased more heat is released; the concentration also changed a lot, and its amount increased. However, in products such as substance (c), it has an inverse relationship with reactants (a) and (b) in such a way that as the concentration and temperature of the reactants increased, these values decreased in the product. On average, concentration changes in the distance from the center to the surroundings the maximum heat source mode was about 76% less than the average heat source mode and about 14% less than the non-heat source mode.

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