分别对无限大、半无限大物体与无限大平板非稳态导热过程的火积耗散场进行了分析,并将火积耗散场与熵产生场进行了比较.无限大物体总的火积耗散随时间的变化率为负定的,并对这一结论给出了证明.对于无限大物体,对耗散波峰的传播速度与波峰振幅进行了讨论.对于半无限大物体,分别对边界温度固定与边界热流固定两种导热情形下的火积耗散场进行了分析;对于无限大平板,分别对对流换热与绝热两种边界条件下的火积耗散场进行了分析.
In this paper, the entransy dissipation fields for the infinity, half-infinite objects and infinite flat are analyzed. The entransy dissipation field and entropy production field are compared. The rate of change of the total entransy dissipation for the infinite object is negative, and the proof for this conclusion is given. The concept of dissipative wave is introduced. The velocity and amplitude of dissipative peak are investigated. The entransy dissipation field for the half-infinity object is discussed from two cases: fixed boundary temperature and fixed boundary heat flux.