Drying of Industrial Hollow Ceramic Brick: A Numerical Analysis Using CFD

Araújo, Morgana Vasconcellos; Santos, Rosélia Maria de Sousa; Silva, R. Moura da; Nascimento, J.B. Silva do; Santos, Wanessa Raphaella Gomes dos; Lima, Antônio Gilson Barbosa de

doi:10.4028/www.scientific.net/ddf.391.48

Cited by 11 publications

(9 citation statements)

References 11 publications

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“…In the consulted literature, no studies were found that evaluated the drying process of ceramic materials at low temperatures (less than 50 • C). In addition, such works are limited to simpler geometries, such as hollow bricks and ceramic blocks [1,3,5,7,8,13,16,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. It was also noticed that the only operational parameter evaluated in the drying process of ceramic materials reported in the literature is the temperature of the drying air; parameters not being evaluated, for example, were cases involving the same temperature and different values for relative humidity and/or velocity, including dimensions variations.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

et al. 2023

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Drying is one of the stages with the highest energy consumption in the manufacturing process of ceramic materials and aims to reduce the product’s moisture to levels necessary for safe firing stage, reducing the chances of defect formation. For sanitary ware, there is an additional energy cost in the pre-drying stage, which takes place immediately after removing the parts from the molds, and is carried out in an environment with lower temperatures (ranging from 30 to 40 °C). This work aims to experimentally study the drying process of sanitary ware at low temperatures, with particular reference to sanitary toilets with industrial dimensions. Four drying experiments were carried out in an oven with different operating conditions (temperature and relative humidity). The results indicate that an increase in temperature and reduction in relative humidity provoke a faster drying rate. For some physical situations, it is more interesting to dedicate efforts to reducing the relative humidity of the drying air instead of seeking solutions to raise its temperature. Furthermore, a correlation between the linear retraction and moisture content was observed; the greater the moisture loss, the greater the sample shrinkage.

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Section: Introductionmentioning

confidence: 99%

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

et al. 2023

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“…In general, several studies related to drying of clay material have been realized by experiments [3][4][5][6] and simulations [7][8][9][10][11][12][13][14][15][16]. For drying predictions, mathematical models based on Fick's and Fourier's laws of diffusion have been frequently used for different materials, considering heat and mass transfer mechanisms, initial moisture content and temperature, volumetric variations, and external environmental conditions [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…Computational fluid dynamics (CFD) simulations have been used with success at different fields, having shown to be a powerful technique in the analysis of different physical and chemical problems. However, research studies involving brick drying using CFD analysis are scarce and, in general, devoted to specific geometries [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Behind the Manufacturing of Industrial Clay Bricks: Drying Stage Predictions Using CFD

Santos

Delgado

Silva

et al. 2022

Advances in Materials Science and Engineering

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Drying of ceramic materials plays important role for industry, involving questions related to investments, energy consumption, product quality, and environmental pollution. In this sense, this work aims to predict heat and mass transfer during the drying process of an industrial clay brick in oven. Simulations were carried out by computational fluid dynamics (Ansys CFX software). Results of the drying and heating kinetics and the moisture content and temperature distributions of the product at different elapsed times are shown and analyzed. The results showed a good agreement between the experimental data, of the surface temperature and the average moisture content, and the numerical results. From the results, it was verified that the proposed mathematical modeling was adequate, providing predicted results in accordance with the experimental data used. Furthermore, numerical results showed that an increase in drying-air temperature and a decrease in relative humidity lead to an increase in heating and moisture removal rates. In the research, it was observed that mass diffusion coefficient increased with increasing drying-air temperature.

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“…Its purpose is to identify better drying conditions (optimized process), with less process time, in order to reduce or eliminate dry material waste, by using a CFD analysis. The authors have contributed to the numerical study of the drying ceramic brick considering the mass and heat transfer and fluid flow in the air around the solid in previous works [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Convective Drying of Ceramic Bricks by CFD: Transport Phenomena and Process Parameters Analysis

et al. 2020

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In the manufacturing process of ceramic brick, the step of drying needs the control of process variables to uniformly dry the porous material, producing a good end-product. The majority of numerical simulations involving drying of ceramic materials is performed considering only the solid domain, resulting in a very simplified and limited study. This way, the objective of this work is the analysis of the drying process with hot air of an industrial hollow clay brick inside the oven at different temperatures by using computational fluid dynamic (CFD). The results of the temperature and water mass distribution inside the brick and of air in the oven at different times of the drying process are shown, analyzed and checked with experimental data, and it was obtained in a concordance with the data. An equation to calculate the brick water mass diffusivity depending on the drying air temperature was proposed.

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Drying of Industrial Hollow Ceramic Brick: A Numerical Analysis Using CFD

Cited by 11 publications

References 11 publications

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

Investigating the Drying Process of Ceramic Sanitary Ware at Low Temperature

Behind the Manufacturing of Industrial Clay Bricks: Drying Stage Predictions Using CFD

Convective Drying of Ceramic Bricks by CFD: Transport Phenomena and Process Parameters Analysis

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