Thermal vibration phenomenon of single phase lagging heat conduction and its thermodynamic basis

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2008,（22）
• 页码范围: 3597-3602
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11434-008-0506-z

摘要

In the present work it is shown that the single phase lagging heat conduction not only avoids the infi-nite heat propagation speed assumed by the conventional Fourier law, but also complies with Galilean principle of relativity. Therefore it is more advantageous than the Cattaneo-Vernotte model. Based on the single-phase-lagging heat conduction model, the condition for the occurrence of thermal vibration of heat conduction is established. In order to resolve the contradiction that the thermal vibration vio-lates the second law of thermodynamics, the extended irreversible thermodynamics is improved and a generalized entropy definition is introduced. In the framework of the newly-developed extended irre-versible thermodynamics the thermal vibration phenomena are consistent with the second law of thermodynamics.