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(yè)大學(xué) 凝固技術(shù)國家重點(diǎn)實驗室

Author(s):

Wang Kang;  Wang Haifeng;  Liu Feng

關(guān)鍵詞:

 ; 熵產(chǎn)生; 熱力學(xué); 非平衡; 凝固

DOI:

10.7502/j.issn.1674-3962.2014.06.03

文獻(xiàn)標(biāo)志碼:

A

摘要:

近年來，最大熵產(chǎn)生原理在物理、化學(xué)、生物等領(lǐng)域得到廣泛應(yīng)用，被認(rèn)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(tài)演化。伴隨非平衡凝固技術(shù)在工業(yè)生產(chǎn)中應(yīng)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(chǎn)生率原理在非平衡凝固中的應(yīng)用可推動非平衡凝固理論的發(fā)展，進(jìn)而促進(jìn)凝固理論的工業(yè)應(yīng)用。本文總結(jié)了近年來最大熵產(chǎn)生原理在非平衡凝固中的應(yīng)用: 二元合金非平衡凝固界面動力學(xué)模型和多相場模型、多元合金非平衡凝固界面動力學(xué)模型、平界面穩(wěn)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.