Mathematical processing of results experimental studies of low-temperature modes of drying of capillary-porous materials of spherical shape


  • Yu.F. Snezhkin Institute of Engineering Thermophysics of NAS of Ukraine
  • V.М. Paziuk Institute of Engineering Thermophysics of NAS of Ukraine
  • Zh.O. Petrova Institute of Engineering Thermophysics of NAS of Ukraine

Abstract

The mathematical processing of experimental data obtained during the drying of spherical form of capillary-porous materials on a convective drying bench allows us to determine the influence of various factors on the process.

The main factors influencing the kinetics of drying of capillary-porous materials of spherical shape are the temperature and velocity of the heat carrier, as well as the initial moisture content of the material. For each factor, the variation levels corresponding to the optimal conditions for conducting experimental studies with low-temperature drying conditions are recommended.

For a mathematical description of the duration of drying of capillary-porous materials, we use an orthogonal composite plan of the second order. As a result, the proposed mathematical model of the process obtained regression equations and the response surface of the duration of drying of capillary-porous materials of spherical shape.

The obtained regression equations of the drying time give a detailed description of the influence of both individual and joint actions of factors, the significance of these parameters is determined by the corresponding coefficients according to Student's criterion.

Also, the adequacy of the mathematical model according to Fisher's criterion, which corresponds to the real object, is checked.

The construction of the response surfaces of the drying time of capillary-porous materials indicates the nature of the effect of these factors in the given range of variation.

References

1. Пазюк В.М. Дослідження низькотемпературних режимів сушіння рослинних капілярно-пористих матеріалів сферичної форми // Кераміка: наука і життя. – 2018. – №4. – С.7 – 14.

2. Янцевич А.А., Александров Ю.А. Планирование эксперимента: Учеб. пособие для студ. экон. и техн. спец. вузов / Народная украинская академия. – Х.: Издательство НУА, 2004. – 208 с.
Published
2019-04-06
How to Cite
Snezhkin, Y., Paziuk, V., & Petrova, Z. (2019, April 6). Mathematical processing of results experimental studies of low-temperature modes of drying of capillary-porous materials of spherical shape. Ceramics: Science and Life, (1(42), 20-25. https://doi.org/10.26909/csl.1.2019.3