智科眼

请选择以下任意方式登录

已有帐号?

验证码登录

微信登录

忘记密码
未收到验证码?
注册

微信注册

智科眼: 双语看懂新科研
首页 中国TOP论文 Nature Science JACS AngewChem PRL AdvMater Lancet Cell EnglMed JAMA
A unified relationship for evaporation kinetics at low Mach numbers
统一关系 for 蒸发动力学 at 低马赫数
Zhengmao Lu; Ikuya Kinefuchi; Kyle L. Wilke; Geoffrey Vaartstra; Evelyn N. Wang
  • Nat Commun volume:10,issue:1 [全文下载] 扫码分享
  • 影响因子: 12.3 点击(127) 收藏(0) 评分(0)
    • 1
    • 2
    • 3
    • 4
    • 5
  • 综合科学
  • 我们通过实验实现并阐明了动力学限制的蒸发,其中靠近液 - 气界面的分子气体动力学主导了整体运输。该过程从根本上决定了各种蒸发系统的性能,并且已经获得了重要的理论兴趣。然而,由于难以隔离界面热阻,实验研究受到限制。在这里,我们使用超薄纳米多孔膜在纯蒸汽环境中克服了这一挑战。我们展示了无量纲形式的蒸发通量和驱动势之间的基本关系,它在不同的工作条件下统一了动力学限制的蒸发。我们模拟非平衡气体动力学,并显示实验和理论之间的良好一致性。我们的工作为蒸发传热提供了一般的品质因数,以及在水净化,蒸汽发生和热管理等应用中实现高效蒸发的设计指南。
  • We experimentally realized and elucidated kinetically limited evaporation where the molecular gas dynamics close to the liquid–vapour interface dominates the overall transport. This process fundamentally dictates the performance of various evaporative systems and has received significant theoretical interest. However, experimental studies have been limited due to the difficulty of isolating the interfacial thermal resistance. Here, we overcome this challenge using an ultrathin nanoporous membrane in a pure vapour ambient. We demonstrate a fundamental relationship between the evaporation flux and driving potential in a dimensionless form, which unifies kinetically limited evaporation under different working conditions. We model the nonequilibrium gas kinetics and show good agreement between experiments and theory. Our work provides a general figure of merit for evaporative heat transfer as well as design guidelines for achieving efficient evaporation in applications such as water purification, steam generation, and thermal management.
  • 暂无相似论文