通过从稳定状态的同位素推断来估计元稳定的热力学特性
Ailo Aasen1, Morten Hammer1,2, David Reguera3,4
1Department of Gas Technology, SINTEF Energy Research, NO-7465 Trondheim, Norway.
The Journal of chemical physics
|July 25, 2024
概括
与等热密度膨胀相比,压力的异体外推是一个优越的方法来预测转移稳定的流体特性. 这种热力学方法使用稳定状态数据准确地模拟相位过渡和稳定性极限.
科学领域:
- 热力学是一种热力学.
- 统计力学 统计力学
- 流体动力学 流体动力学
背景情况:
- 对热力学和工业应用来说,描述局部但不是全球平衡的超稳定流体对于热力学和工业应用来说至关重要,特别是第一阶段相位过渡.
- 当前的方法往往依赖于从稳定状态的同热推断,使用气体的病毒扩张或液体的密度扩张.
研究的目的:
- 为了研究同位体 (恒定体积) 压力抽取的有效性,作为一种优越的替代方案,以异热密度抽取转移稳定的流体.
- 开发和评估对蒸汽和液体相的同位素抽取策略,以及扩张系数的直接模拟方法.
主要方法:
- 开发和评估了两种不同的同位素外推策略,一种用于蒸汽,一种用于液体.
- 介绍了一种方法,可以从正规集体模拟中直接计算等离体膨胀系数.
- 使用范德瓦尔斯状态方程和莱纳德-斯电位验证的方法.
主要成果:
- 在预测转移稳定的流体性质方面,异体外推证明优于异热密度扩张.
- 方法准确地复制了伦纳德-斯电位的模拟结果,并预测了即使在高温下也存在深度转移稳定的压力.
- 离合式外推成功预测了热力学旋转点 (机械稳定性极限).
结论:
- 隔离式压力取值是一种有效和准确的方法,用于确定转移稳定的流体特性和相位过渡边界.
- 该方法准确地预测了螺旋曲线,为现有方法提供了更可靠的替代方案,如水的预测螺旋曲线行为所示.
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