Article (Scientific journals)
Direction and surface sampling in ray tracing for spacecraft radiative heat transfer
Jacques, Lionel; Masset, Luc; Kerschen, Gaëtan
2015In Aerospace Science and Technology, 47, p. 146-153
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Keywords :
Thermal analysis; Radiative heat transfer; Spacecraft structures; Monte Carlo ray tracing
Abstract :
[en] This paper addresses the computation of radiative exchange factors through Monte Carlo ray tracing with the aim of reducing their computation time when dealing with the finite element method. Both direction and surface samplings are studied. The recently-introduced isocell method for partitioning the unit disk is applied to the direction sampling and compared to other direction sampling methods. It is then combined to different surface sampling schemes with either one or multiple rays traced per surface sampling point. Two promising approaches present better performances than standard spacecraft thermal analysis software. The first approach combines a Gauss surface sampling strategy with a local isocell direction sampling, whereas the second approach fires one ray per surface points using a global isocell direction sampling scheme. The advantages and limitations of the two methods are discussed, and they are benchmarked against a standard thermal analysis software using the entrance baffle of the Extreme Ultraviolet Imager instrument of the Solar Orbiter mission.
Research center :
Space Structure and Systems laboratory
CSL - Centre Spatial de Liège - ULiège
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Jacques, Lionel  ;  Université de Liège > CSL (Centre Spatial de Liège)
Masset, Luc ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan  ;  Université de Liège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Language :
English
Title :
Direction and surface sampling in ray tracing for spacecraft radiative heat transfer
Publication date :
December 2015
Journal title :
Aerospace Science and Technology
ISSN :
1270-9638
eISSN :
1626-3219
Publisher :
Elsevier
Volume :
47
Pages :
146-153
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 20 October 2015

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