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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Druckformat: 1940-2503
ISSN Online: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2020033651
Forthcoming Article

A transient numerical simulation of thermal bridges in composite building materials

Mustapha Maliki
Construction, Transport and Protection of the Environment laboratory (LCTPE)
Nadia Laredj
LCTPE Laboratory, University Abdelhamid Ibn Badis of Mostaganem, Algeria
Hanifi Missoum
Construction, Transport and Protection of the Environment laboratory (LCTPE)

ABSTRAKT

Thermal bridges typically occur at the junction of different building components where it is difficult to achieve continuity in the thermal insulation layer. In this paper, a numerical method is presented to investigate the thermal bridge behavior in composite building structures. The general heat transfer conservation equation is implemented in steady state conditions via the finite element software Comsol-Multiphysics. Temperatures and heat flux are calculated for both thermal conduction and convection. The numerical approach is validated using a 2D model issue from the European standard EN ISO 10211:2007 to ensure the good agreement of the presented numerical model. An exhaustive evaluation of the bridging effects in the considered composite structure benchmark is conducted. The heat flux through inner surface is analyzed over time for a step solicitation and for given boundary conditions. Results are really satisfactory; evolution of temperature heat flux through the thermal bridge is close to that of the corresponding numerical method. All calculations results lie well within the requested 0,1K difference in temperature and 0,1W/m difference in heat flow.