Heat and Mass Diffusion Including Shrinkage and Hygrothermal Stress during Drying of Holed Ceramics Bricks

Abstract:

The Aim of this Work Is to Present a Three-Dimensional Mathematical Modelling to Predict Heat and Mass Transport inside the Industrial Brick with Rectangular Holes during the Drying Including Shrinkage and Hygrothermalelastic Stress Analysis. the Numerical Solution of the Diffusion Equation, Being Used the Finite-Volume Method, Considering Constant Thermo-Physical Properties and Convective Boundary Conditions at the Surface of the Solid, it Is Presented and Analyzed. Results of the Temperature, Moisture Content and Stress Distributions, and Drying and Heating Kinetics Are Shown and Analyzed. Results of the Average Moisture Content and Surface Temperature of the Brick along the Drying Process Are Compared with Experimental Data (T = 80.0oC and RH = 4.6 %) and Good Agreement Was Obtained. it Was Verified that the Largest Temperature, Moisture Content and Stress Gradients Are Located in the Intern and External Vertexes of the Brick.

• Periodical: Defect and Diffusion Forum (Volumes 312-315)
• Pages: 971-976
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.312-315.971
• Online since: April 2011
• Authors: J. Barbosa da Silva, G. Silva Almeida, W.C.P. Barbosa de Lima, Gelmires Araújo Neves, Antônio Gilson Barbosa de Lima
• Keywords: Finite Volume, Holed Bricks, Hygrothermoelastic Stress, Numerical, Shrinkage

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