PhD defence of Rémy Gérard

 

Abstract:

 

Properly taking into account thermal radiative transfer matters a great deal to properly model numerous industrial processes. This thesis focuses on setting up a proper modelling for it in certain industrial configurations where some hypotheses are met: grey, homogeneous materials and non-transmitting medium. The Surface-to-surface approach we have chosen allows for such an accurate solving of thermal transfer. We make use of immersed meshes and implicit object definitions by the levelset function to allow for an adaptable model and an implicit definition of the radiating surfaces. We couple radiative transfer with other forms of thermal transfer in a P1 finite elements methods. After validating our model on numerous simple test cases, we set up ray tracing to accelerate obstruction computation and organize the radiating facets into a kd-tree. We conclude by ensuring our solver is highly scalable on parallel computing and show simulation cases of real industrial processes.

 

Thermal radiation between two cubes separated by a vacuum

 

 

 

Keywords: Thermal Radiation, S2S, Finite Elements, Kd Tree, Immersed Mesh, Ray Tracing