An Iterative Method for Solving of Coupled Equations for Conductive-Radiative Heat Transfer in Dielectric Layers
| Autor: | Yurij Boychuk, Vasyl Chekurin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Convection 0209 industrial biotechnology Article Subject Iterative method business.industry Applied Mathematics QC1-999 General Physics and Astronomy 02 engineering and technology Dielectric Radiation Radiation properties Computational physics Nonlinear system 020303 mechanical engineering & transports 020901 industrial engineering & automation Optics 0203 mechanical engineering Thermal radiation Heat transfer business |
| Zdroj: | Advances in Mathematical Physics, Vol 2017 (2017) |
| ISSN: | 1687-9120 |
| DOI: | 10.1155/2017/9139135 |
| Popis: | The mathematical model for describing combined conductive-radiative heat transfer in a dielectric layer, which emits, absorbs, and scatters IR radiation both in its volume and on the boundary, has been considered. A nonlinear stationary boundary-value problem for coupled heat and radiation transfer equations for the layer, which exchanges by energy with external medium by convection and radiation, has been formulated. In the case of optically thick layer, when its thickness is much more of photon-free path, the problem becomes a singularly perturbed one. In the inverse case of optically thin layer, the problem is regularly perturbed, and it becomes a regular (unperturbed) one, when the layer’s thickness is of order of several photon-free paths. An iterative method for solving of the unperturbed problem has been developed and its convergence has been tested numerically. With the use of the method, the temperature field and radiation fluxes have been studied. The model and method can be used for development of noncontact methods for temperature testing in dielectrics and for nondestructive determination of its radiation properties on the base of the data obtained by remote measuring of IR radiation emitted by the layer. |
| Databáze: | OpenAIRE |
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