摘要
耗散普遍存在于一切非平衡过程中,非平衡相变一般发生在远离平衡、耗散强烈的非线性区。本文在非平衡系统规格化模型的基础上,分析了非平衡相变临界参考态的耗散情况。引入了一个衡量系统远离平衡程度的耗散参量M_D。在非平衡相变临界点的无限小邻域内导出了M_D与系统序参量u的依赖关系。揭示了M_D的临界奇异性,并用临界耗散指数θ来刻划M_D在非平衡相变临界点的奇异行为。此外,本文还详细讨论了平衡相变临界与非平衡相变临界的差别与联系,并将两者统一在一起。
In general speaking, there are dissipations in any nonequilibrium processes. Nonequilibrium phase transform usually occures in nonlinear region which is far from equilibrium and has strong dissipation. On the basis of this paper, the model of the nonequilibrium system has been standardized. The dissipative condition of the critical reference state in nonequilibrium phase transform is analysed. A dissipative parameter M_D is introduced to judge the degree of the system which is far from noneq- uilibrium state. The relation that M_D depends on orderparameter u is derived in the critcal point vicinity of the nonequilibrium phase trans- form. The critical singular property of M_D is revealed. A critical dis- sipative exponent θ is used to describe the critical behaviour of M_D in nonequilibrium phase transform. In addition, the difference and conne- ction of equilibrium phase transform with nonequilibrium phase have been discussed, and they are unified together.
出处
《贵州科学》
1991年第4期273-281,共9页
Guizhou Science
基金
贵州省科委基金支助项目的一部分
