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  4. Obtaining and investigation of the conditions of heat transfer through inhomogeneous inclusion with heat sources

Obtaining and investigation of the conditions of heat transfer through inhomogeneous inclusion with heat sources

MMC.
2015;
Volume 2, Number 1
: pp. 33-47
https://doi.org/10.23939/mmc2015.01.033
Received: March 27, 2015

Math. Model. Comput. Vol. 2, No. 1, pp. 33-47 (2015)

Authors:
  1. B. Gera
  2. V. Dmytruk
1
Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan
2
Lviv Polytechnic National University

The conditions of nonideal heat transfer are obtained for a heat conduction problem of contacting layers through a thin heterogeneous sublayer (inclusion) with acting heat sources (heat sinks). These conditions include both thermal resistances of components of the inclusion and specific powers of heat sources in them. On this basis, the heat conduction problem with nonideal conditions of heat transfer without consideration of inner inclusion is written down. Their use ensures observable features of temperature and heat flux, i.e. the function of temperature and the function of heat flux have a drop when passing through the contact interface. The magnitude of thermal resistance is suggested to be determined by means of more usual for measuring values, e.g. a thermal conductivity coefficient and a thickness of the inclusion. Surface specific heat sources can be set if the values of heat dissipation on the contact boundary are known. From the obtained and generalized heat transfer conditions, the known conditions of nonideal thermal contact can be obtained as particular cases. 

heat conduction problem
composite layer
thin inclusion
heat transfer
nonideal contact conditions
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