热传输歇斯底里产生通过频率切换的时间依赖的温度梯度的热传输歇斯底里
1Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Entropy (Basel, Switzerland)
|January 24, 2025
概括
在纳米级热传输中,振荡频率的变化显著改变了hysteresis曲线. 这种频率切换创造了独特的模式,影响了热器件设计.
科学领域:
- 热力学是一种热力学.
- 在纳米尺度科学科学.
- 统计力学就是统计力学.
背景情况:
- 了解纳米系统中的热传输对于开发先进的热器件至关重要.
- 振荡的温度梯度引入了复杂的动态,静态模型无法完全捕捉到.
- 随机能量学为分析不平衡系统提供了一个框架.
研究的目的:
- 在纳米级分子模型中研究周期性转移振荡频率对热传输歇斯底里斯的影响.
- 分析频率切换对热流和系统与热浴之间能量交换的影响.
- 探索由于动态频率变化导致的热传输歇斯底里斯曲线中新奇特征的出现.
主要方法:
- 应用一个随机能量框架.
- 对能量流的分析表达式的推导.
- 没有平衡的分子动力学模拟用于验证.
- 在依赖时间的振荡温度梯度下分析传热歇斯底里曲线.
主要成果:
- 热传输歇斯底里曲线因在快速和慢速之间转移振荡频率而发生显著变化.
- 频率切换导致了独特的特征的出现,如扣扣的循环和复杂的多循环模式.
- 对能量流的分析预测与模拟结果有很好的一致性.
结论:
- 定期转移的振荡频率是控制纳米级热传输歇斯底里斯的一个关键因素.
- 观察到的现象对设计下一代热神经形态设备有直接影响.
- 这项研究为设计具有量身定制性能的热记忆器和记忆电容器提供了基础.
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