文章信息/Info

Title:

Applications of the Maximum Entropy Production Principle to Non-Equilibrium Solidification

作者:

王慷; 王海豐; 劉峰

西北工業大學 凝固技術國家重點實驗室

Author(s):

Wang Kang;  Wang Haifeng;  Liu Feng

關鍵詞:

 ; 熵產生; 熱力學; 非平衡; 凝固

DOI:

10.7502/j.issn.1674-3962.2014.06.03

文獻標志碼:

A

摘要:

近年來，最大熵產生原理在物理、化學、生物等領域得到廣泛應用，被認為是描述非平衡體系演化的普適性原理; 其核心思想是孤立非平衡耗散體系演化總是選擇最短路徑，以使體系盡可能快地向平衡態演化。伴隨非平衡凝固技術在工業生產中應用更加廣泛，凝固理論研究卻仍集中于近平衡過程; 最大熵產生率原理在非平衡凝固中的應用可推動非平衡凝固理論的發展，進而促進凝固理論的工業應用。本文總結了近年來最大熵產生原理在非平衡凝固中的應用: 二元合金非平衡凝固界面動力學模型和多相場模型、多元合金非平衡凝固界面動力學模型、平界面穩定性分析及自由枝晶生長模型。

Abstract:

Recently, maximum entropy production principle (MEPP) has been widely applied to physical, chemical and biological problems. MEPP, which is considered a universal law for the evolution of non-equilibrium dissipative systems, means that the isolated non-equilibrium system will tends to the state with maximum entropy along the shortest possible path. Rapid solidification, a typical non-equilibrium process, has been adopted in industrial processes while the theoretical studies of solidification still focus on the near-equilibrium solidification. Thus, the application of MEPP can motivate the development of non-equilibrium solidification theory, thus promote its application to industrial processes. This paper summaries recent application of MEPP to non-equilibrium solidification, including interface kinetics and multi-phase-field model for binary alloys, interface kinetics, morphological stability and dendrite growth for multi-component alloys.