具有惯性的聚合物珠系统中的可调Mpemba效应
Mass-induced Mpemba effect in a polymer-bead system
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中文总结 AI 辅助
研究提出基于实验的模型,通过系统惯性控制Mpemba效应,描述聚合物变性转变及力-伸长曲线平台,阐述初始温度等条件与珠子动能关系,增加珠子质量可拓宽效应范围,类似机制产生逆效应。
中文摘要 AI 辅助
我们提出了一个基于实验的模型,其中Mpemba效应可通过系统惯性来控制。该模型描述了一种经历变性转变的聚合物,其力-伸长曲线包含一个使弛豫变慢的平台。当系统最初在较高温度或较弱拉伸力下制备时,珠子积累更多动能,能更快越过平台,产生Mpemba效应。增加珠子质量拓宽了该机制起作用的初始温度范围,类似机制还能产生逆Mpemba效应。
英文摘要
We propose a physically motivated model in which the Mpemba effect is induced by the system's inertia. The model describes a polymer undergoing a denaturation transition whose force-extension curve contains a weak-force plateau that slows relaxation. In the presence of inertia, a farther initial state can reach and cross the plateau sooner, producing the Mpemba effect. Increasing the bead mass broadens the range of initial conditions over which this mechanism operates. A similar mechanism also generates the inverse Mpemba effect.