平行热源下二维热隐身斗篷熵产特性研究

Entropy generation characteristics of Two-Dimensional thermal cloaking model with parallel heat source

中文关键词: 热隐身斗篷  超材料  熵产率  导热系数

英文关键词: thermal cloak  meta-material  entropy generation rate  thermal conductivity

中文摘要:

      热隐身斗篷结构具有良好的热保护和精确控温的效果，在科学、工业及军事等方面具有重要价值。根据扩散方程在几何变换中的形式不变性，建立了平行热源下的二维隐身斗篷模型，从热力学角度出发以熵产率为指标对体系的不可逆损失分布进行了研究。结果表明，斗篷结构有效减少了保护区外边界处能量的不可逆损失，提高了隐身效率。此外，以总熵产率为指标对斗篷内材料层排布方式进行了比较，为热隐身斗篷结构的优化提供了理论依据。

英文摘要:

      Thermal cloak structure has good thermal protection and precise temperature control effect, which is highly valued in science, industry and military.According to the form in-variance of diffusion equation in geometric transformation, a two-dimensional cloak model with parallel heat sources is established and the entropy generation rate is proposed as an index to evaluate the irreversible loss of the model from the thermodynamic view. The results show that the cloak structure effectively reduces the irreversible energy loss at the outer boundary of the protected area and improves the cloaking efficiency. In addition, a comparative analysis of the arrangement of material layers is carried out to provide theoretical evidence for further optimizing of the cloaking structure.