Multiscale modeling of the thermomechanical behavior in heterogeneous media embedding Phase Change Materials particles

JOURNAL OF COMPUTATIONAL PHYSICS

卷:378

Article

Kodjo, Kossi-Mensah^1,2,3  Yvonnet, Julien¹  Karkri, Mustapha²  Sab, Karam³ 

[1] Univ Paris Est, Lab Modelisat & Simulat Multi Echelle MSME, UMR 8208 CNRS, 5 Bd Descartes, F-77454 Marne La Vallee, France

[2] Univ Paris Est, CERTES, 61 Av Gen Gaulle, F-94010 Creteil, France

[3] Univ Paris Est, Lab Navier, CNRS UMR 8205, ENPC,IFSTTAR, 6 & 8 Ave Blaise Pascal, F-77455 Marne La Vallee, France

关键词: Phase Change Material;    Heat conduction;    Computational homogenization;    Multiscale modeling;    FE2 method;   

DOI  :  10.1016/j.jcp.2018.11.014

来源: Elsevier

【 摘 要 】

In this work, a multiscale model for thermomechanical properties of composite structures containing phase change particles is developed. For the mechanical part, a classical linear computational homogenization procedure is employed. For the thermal part, due to the strong nonlinear, history-dependent thermal effects, a concurrent multiscale (FE2) method is extended to take into account the presence of Phase Change Materials particles (PCM) at the microscale. The PCM inclusions change from liquid to solid state in the range of room temperature. This phase change induces a modified macroscopic thermal behavior, which can be used e.g. to design materials with enhanced thermal inertia and reduce energy consumption in civil engineering constructions. The technique allows taking into account accurately the fully nonlinear, history-dependent thermal behavior through numerical calculations at the microscale based on a Representative Volume Element (RVE) and its effect at the macroscale. The method is applied to concrete material including paraffin wax PCM. The results show the benefits of the PCM on the thermal behavior, including shifted and smoothed temperature response as compared to materials without PCM particles. (C) 2018 Elsevier Inc. All rights reserved.

【 授权许可】

Free