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Pau, France

Franquet E.,LaTEP ENSGTI | Franquet E.,French Institute for Research in Computer Science and Automation | Perrier V.,French Institute for Research in Computer Science and Automation | Perrier V.,University of Pau and Pays de lAdour
Journal of Computational Physics | Year: 2012

A high-order numerical method is developed for the computation of compressible multiphase flows. The model we use is based on the Baer and Nunziato type systems . [4]. Among all the other available models in the literature, these systems present the advantage to be able to simulate either interface or mixture problems. Nevertheless, they still raise some issues, mainly based on their non-conservative feature. The numerical method we propose is a discontinuous Galerkin type. In this work, the interior side integrals are computed thanks to . [2]. Robustness and high order of accuracy of the method are proved on classical interface problems, but also on suitably derived analytical solutions. © 2012 Elsevier Inc.

Stephane G.,LaTEP ENSGTI | Erwin F.,LaTEP ENSGTI | Jean-Pierre B.,LaTEP ENSGTI | Jean-Pierre D.,LaTEP ENSGTI
Thermochimica Acta | Year: 2012

Current challenges in the energy storage often involve phase change materials. Therefore, there is a real need for accurate determinations of their intrinsic properties. Regularly, differential scanning calorimetry is used to perform such a goal. Nevertheless, to obtain fair results, one needs to consider the transfer phenomenon inside the sample and at its boundary. This implies that the geometry should be known exactly, which is usually not the case. In this paper, we propose a way to avoid such issues, by considering an equivalent spherical model. Our final goal is to obtain a simple and fast method so as to plan future identifications of the thermodynamical properties of phase change materials. © 2011 Elsevier B.V. All rights reserved.

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