Effective thermal conductivity of heterogeneous multi-component materials: an SPH implementation |
| |
Authors: | Fangming Jiang Antonio C M Sousa |
| |
Institution: | (1) Departamento de Engenharia Mecanica, Universidade de Aveiro, Campus Universitàrio de Santiago, 3810-193 Aveiro, Portugal;(2) Department of Mechanical Engineering, University of New Brunswick, Fredericton, NB, Canada, E3B 5A3 |
| |
Abstract: | Modeling heat transfer and fluid flow in materials with complicated micro-structures is a major challenge to numerical methods
due to their multiscale and multiphysics nature. A relatively novel numerical technique—the meshless smoothed particle hydrodynamics
(SPH) method has the potential of making a significant contribution to this research field. In the present SPH modeling effort,
a 2D modeling system is devised for the prediction of the effective thermal conductivity in heterogeneous materials containing
two or three different components. The microscopic component configuration inside the materials is constructed in the SPH
methodology by randomly assigning particles as a certain component to meet the required macroscopic composition. For heterogeneous
two-component materials, the effective thermal conductivity predicted by the modified effective medium theory model with the
so-called “flexible” factor f equal to 4.5 agrees well with the SPH data. On the basis of a simple “step-process” concept, the effective thermal conductivity
of a heterogeneous multi-component material can be derived from the corresponding “degenerate” materials which consist of
fewer components. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|