A model based study of the drying and shrinkage behavior of a ceramic green body

Arvanitidis, Achilleas L.; Kothalis, Agis; Konstantinidis, Dimitris; Kostoglou, Margaritis; Georgiadis, Michael C.

doi:10.1080/07373937.2022.2153135

Cited by 5 publications

(5 citation statements)

References 25 publications

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“…When W becomes less than that critical value, all shrinkage phenomena stop and as moisture evaporates, air of the same volume as that of the removed water penetrates the pores of the material. To quantify this state transition that defines the shrinkage mechanism of clay materials, a shrinkage parameter, α, is used, which obtains the value 1 when W > W cr and the value 0 otherwise α = { lefttrue 1 , W ≥ W cr 0 , W < W cr Given that, the body porosity is described by the following conservation equation prefix− ∂ ε ∂ t + v wag ∂ ε ∂ z = prefix− ( 1 − α ) Ḋ d normalw V tile , 0.25em z ∈ [ 0 , Z ) where V tile is the volume of the tiles from all corridors per unit length of the dryer.…”

Section: Mathematical Frameworkmentioning

confidence: 99%

“…The approach to account for shrinkage adopted in this work is conceptually identical to the one developed in our previous work. 26 The implementation of the idea, though, presents some minor differences, mostly because the material in this work is approached as a lumped object (no spatial distributions inside the material). Furthermore, the studied material has a very small aspect ratio, which lets us consider it as a semi-infinite tile, with all shrinkage phenomena occurring on the thickness dimension.…”

Section: M Mmentioning

confidence: 99%

“…The approach to account for shrinkage adopted in this work is conceptually identical to the one developed in our previous work . The implementation of the idea, though, presents some minor differences, mostly because the material in this work is approached as a lumped object (no spatial distributions inside the material).…”

Section: Mathematical Frameworkmentioning

confidence: 99%

“…Some contributions employ solid mechanics models to calculate body shrinkage through strain–stress relationships. , Borgman and Holtzman used a pore-network model to investigate the solid matrix deformations during drying and the effect of shrinkage on the drying patterns and rates. More recently, Arvanitidis et al developed a model, based on the shrinkage velocity approach, to study the impact of shrinkage on the drying kinetics of a ceramic tile.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimal Tunnel Dryer Operating Strategies for the Production of Ceramic Roof Tiles under Tight Quality Considerations

Arvanitidis

Kostoglou

Georgiadis

2023

Ind. Eng. Chem. Res.

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This work presents a model-based approach to systematically derive optimal operating policies for an existing industrial-scale tunnel dryer. The primary focus of the study is to control the shrinkage stage, during which product fracture risk is highest, with the minimum energy cost possible. First, the steady-state dryer operation is optimized with the attained operating policy resulting in 1.5% fuel economy, while assuring product quality. The dryer operation is then optimized at transient state, investigating two case studies, with the derived optimization results being thoroughly compared with those attained when no control actions are taken. The first case considers a 9.57% increase in dryer productivity. It is demonstrated that the derived operating policy guarantees a well-controlled drying process, with the minimum extra fuel consumption being about 7.7%. The second case study considers the coexistence of two different raw clay-based ceramics in the dryer. Once again, the optimal operating scheme assures the final product quality, but with a minimum thermal energy consumption increase of 3.4%.

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Section: Mathematical Frameworkmentioning

confidence: 99%

Section: M Mmentioning

confidence: 99%

Section: Mathematical Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Tunnel Dryer Operating Strategies for the Production of Ceramic Roof Tiles under Tight Quality Considerations

Arvanitidis

Kostoglou

Georgiadis

2023

Ind. Eng. Chem. Res.

Self Cite

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“…Arvanitidis et al [25] developed a 1D diffusion model and performed a parametric analysis to investigate the influence of shrinkage on the drying kinetics of ceramic tiles. After validating the mathematical model by comparing the results with experimental data, the authors concluded that the magnitude of shrinkage directly influences alterations in porosity, thereby significantly impacting both the drying kinetics and the distribution of properties within the material.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study

Gomez,

Gomes,

Gurgel

et al. 2023

Processes

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Drying is a thermodynamic process in which the moisture contained in the solid is removed by evaporation through the supply of an appreciable amount of thermal energy. It is recognized as a critical and intricate stage in the manufacturing process of ceramic materials. In general, drying at higher temperatures and lower air-relative humidity provokes severe hydric, thermal, and mechanical fractures in the ceramic parts, thus reducing product quality after the process. Then, this process must be realized under controlled conditions. From an industrial point of view, the drying process of sanitary ware takes place in two stages: drying at low temperatures (less than 40 °C) and drying at high temperatures (above 50 °C). Thus, the purpose of this work is to experimentally investigate the drying process at low temperatures in sanitary toilets. Drying experiments were conducted in an oven with the same temperature (35 °C) and different relative humidity of the drying air. The results of the moisture content, temperature, and dimension variations along the process, as well as drying and heating rates, are reported and analyzed. The results indicate that the higher the air’s relative humidity, the slower the moisture removal. Herein, aspects of the product quality after the drying process are also discussed.

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Perspectives in drying of ceramics

Nait-Ali,

Alzina,

Lauro

et al. 2024

Open Ceramics

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A model based study of the drying and shrinkage behavior of a ceramic green body

Cited by 5 publications

References 25 publications

Optimal Tunnel Dryer Operating Strategies for the Production of Ceramic Roof Tiles under Tight Quality Considerations

Optimal Tunnel Dryer Operating Strategies for the Production of Ceramic Roof Tiles under Tight Quality Considerations

The Effect of Air Relative Humidity on the Drying Process of Sanitary Ware at Low Temperature: An Experimental Study

Perspectives in drying of ceramics

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