05/06/2019 : Mickaël Le Bohec received the Biot-Fourier prize of the French Heat Transfer Society (Nantes 2019)

(La Société Française de Thermique a mis en place le prix Biot-Fourier qui récompense la meilleure communication scientifique lors de son congrès annuel.)



Mickaël Le Bohec received the Biot-Fourier prize of the French Heat Transfer Society

Title : “Model reduction of radiative heat transfer in buildings by a hierarchical radiosity method”

Texte : In buildings, radiative heat transfers can be idealized by the radiosity equation. This one needs the evaluation of geometrics couplings between the elements of the scene called form factors or view factors. It’s generally hard to get them, especially when there are obstructions. Beyond the evaluation of those factors, the algebraic system is difficult to solve because each surface interacts, usually, with all the others and because the number of nodes required for the description of a complexe scene is important. We present a resolution method which refines the mesh of the scene while constructing a multi scale representation of form factors between its elements, in order to avoid having to compute all the transfers at the finest resolution. This drastically reduces the computation time and allows to use this method in an industrial development process.

Credits : This work was supervised by Denis Lemonnier (Senior Researcher, CNRS) and Didier Saury (Professor of University, P’ Institute) and funded by the ANRT and the Groupe Atlantic.

Label : This solution was obtained in 52 min while several days would be necessary with a full matrix method.

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