论文部分内容阅读
傅里叶导热定律导出的温度演化方程将得出无限大的热扰动传播速率。为了克服这个问题,一些修正导热模型被提出,可以得到双曲型温度方程,保证有限的热波传播速率。但是,新的传热模型得出的温度演化将使现有的不可逆热力学中熵产不能保持正定。拓展不可逆热力学通过修正熵以及熵产的表达式,使双曲导热也能得到正定的熵产率。热质理论用力学的概念分析热波传递过程中的热质能耗散与熵产的关系,对熵产的来源做了新的解释。热质理论得出的熵产表达式在双曲导热过程中保持正定,并指出,波动传递过程中的干涉是导致熵产率非均匀变化的原因。
The temperature evolution equation derived from the Fourier thermal law leads to an infinitely large thermal disturbance propagation rate. In order to overcome this problem, some modified thermal models have been proposed to obtain hyperbolic temperature equations and to ensure finite thermal wave propagation velocity. However, the temperature evolution derived from the new heat transfer model will not allow the entropy to be positive definite in the existing irreversible thermodynamics. Expanding Irreversible Thermodynamics By correcting entropy and entropy production expressions, positive entropy yields are also obtained for hyperbolic heat conduction. The theory of thermal mass theory uses the concept of mechanics to analyze the relationship between thermal mass energy dissipation and entropy production in the heat wave propagation process and makes a new interpretation of the origin of entropy generation. The entropy production expression derived from the thermal mass theory maintains a positive definite value in the hyperbolic heat transfer process. It is pointed out that the interference in the wave transfer process is the cause of the non-uniform change of the entropy production rate.