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熵产是非平衡热力学中的核心物理量,传统上表示为广义力(驱动力)与广义流的乘积.这种表达存在两方面缺陷:一是广义力与广义流的拆分具有任意性;更重要的是,以其计算热波传递时熵产可以为负值,从而违反热力学第二定律.本文基于热质理论分析表明,传热过程的熵产实质上是由热质流体的热质能耗散引起的,所以熵产中的力不是驱动力而是阻力,并且具有力的量纲.由此提出的熵产修正表达式,不仅在计算热波传递过程中熵产恒为正值,与扩展不可逆热力学中的熵产表达式一致,而且不存在力和流拆分的任意性.
Entropy production is the core physical quantity in non-equilibrium thermodynamics, which is traditionally expressed as the product of generalized force (driving force) and generalized flow. There are two defects in this expression: First, the resolution of generalized force and generalized flow is arbitrary; Is that its entropy production can be negative when calculating heat wave propagation and violate the second law of thermodynamics.Based on the analysis of the thermal mass theory, the entropy production in the heat transfer process is essentially determined by the thermal energy consumption of the thermal fluid Therefore, the force in entropy production is not a driving force but a resistance, and has a dimension of force. The proposed expression of entropy generation correction not only makes the entropy constant constant positive in computing the heat wave transfer process, The expression of entropy production in the extension of irreversible thermodynamics is consistent, and there is no arbitrariness of force and flow resolution.