Journal of Engineering Physics and Thermophysics

, Volume 87, Issue 6, pp 1374–1385 | Cite as

Model of the Structure of Fibrous Heat-Insulating Materials for Analyzing Combined Heat Transfer Processes


A model of the structure of a highly porous fibrous material is suggested within the framework of which deformation of a setting semifinished item is considered. An algorithm is suggested for calculating the effective thermal conductivity and its components. It accounts for heat transfer through a solid phase and a gas, as well as by radiation. The Mie theory is used to estimate the radiative heat transfer, which led to a somewhat underestimated result in determining the effective thermal conductivity. To refine the contribution of radiative heat transfer, it is suggested to determine the optical properties of materials by solving the inverse problem of radiation transfer, the initial data for which are furnished by experimentally measured values of the coefficients of radiation transmission through a set of samples of different thickness. As a result, the radiation absorption and diffusion coefficients of a fibrous heat-insulating material have been determined. The dependence of the effective thermal conductivity of a material on temperature has been obtained, which actually coincides with the results of experimental investigations.


fibrous heat-insulating materials model of a structure computational determination of thermal conductivity radiative component of effective thermal conductivity optical properties prediction of properties 


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© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.All-Russia Scientifi c-Research Institute of Aviation MaterialsMoscowRussia
  2. 2.N. É. Bauman Moscow State Technical UniversityMoscowRussia

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