0000000000365131
AUTHOR
Taras Kournyts'kyi
Investigation of molecular gas admixture diffusion, heat transfer and stress state in amorphous solid subjected to thermal infrared radiation
Mathematical model for description of coupled mechanical, thermal, and diffusive processes in semitransparent amorphous solid with molecular gaseous admixture subjected to thermal infrared radiation was developed. Governing equations of the model were derived within thermodynamic model of hard mixture while microscopic considerations were involved for obtaining some constitutive equations. Above coupled processes were investigated in glass layer with either two-atomic CO admixture or three-atomic H2O admixture. Developed model allows design regimes for such technological problems as degassing glass elements of electro-vacuum devices, drying of low electro-conductive solids, deposition of pr…
Thermal behavior of absorbing and scattering glass media containing molecular water impurity
The effect of the presence of molecular water impurity of various concentrations in absorbing and scattering glass media on the temperature field in a layer subjected to thermal infrared radiation is investigated. The analysed medium is treated as a multicomponent medium consisting of glass matrix and water impurity. The effect of radiation on the medium is expressed by heat sources in each component due to absorption of radiation. It is shown that the presence of water impurity in the glass medium should be accounted for in order to predict the temperature distribution during radiation action. The effect of scattering of radiation by water molecules on thermal and diffusive processes in th…