Further considerations on anisotropic thermal efficiency of symmetric composites

被引：8

作者：

Corasaniti, Sandra ^{[1
]}

Gori, Fabio ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Dept Ind Engn, I-00133 Rome, Italy

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2015年 / 88卷

关键词：

Symmetric composite; Anisotropic thermal efficiency; Effective thermal conductivity; Anisotropy degree; Potential anisotropy; THEORETICAL PREDICTION; CONDUCTIVITY; EXTENSION; SOILS; MODEL;

D O I：

10.1016/j.ijheatmasstransfer.2015.04.111

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The paper investigates the anisotropic thermal efficiency of symmetric composites made of two components, matrix and fiber reinforcement. The anisotropic degree of the composite is the ratio between the effective thermal conductivity in the direction parallel to the fiber reinforcement, and that in the perpendicular direction. The potential anisotropy of the materials is the ratio between the thermal conductivity of the fiber to that of the matrix. The anisotropic thermal efficiency is the ratio between the anisotropy degree of the composite, and the potential anisotropy of the two materials. The theoretical model solves the heat conduction equation under the two thermal assumptions of parallel isotherms and parallel heat fluxes, and without any empirical constant nor analogy with other phenomena, evaluating the anisotropic thermal efficiency of the symmetric composite. The variation of the anisotropic thermal efficiency is investigated versus the potential anisotropy of the materials and the ratio between fiber and matrix thicknesses. The anisotropic thermal efficiency has a maximum versus the ratio between fiber and matrix thicknesses, and decreases with the increase of the potential anisotropy, reaching a minimum, which is only dependent on the geometrical configuration of the symmetric composite. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：836 / 843

页数：8

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