Sega Marcello, Fábián Balázs, Jedlovszky Pál
University of Vienna , Boltzmangasse 5, A-1090 Vienna, Austria.
Institut UTINAM (CNRSUMR6213), Université Bourgogne Franche Comtè 16 route de Gray, F-25030 Besançon, France.
J Phys Chem Lett. 2017 Jun 15;8(12):2608-2612. doi: 10.1021/acs.jpclett.7b01024. Epub 2017 May 30.
Surface tension, the tendency of fluid interfaces to behave elastically and minimize their surface, is routinely calculated as the difference between the lateral and normal components of the pressure or, invoking isotropy in momentum space, of the virial tensor. Here we show that the anisotropy of the kinetic energy tensor close to a liquid-vapor interface can be responsible for a large part of its surface tension (about 15% for water, independent from temperature).
表面张力是流体界面表现出弹性并使其表面积最小化的趋势，通常被计算为压力的横向分量和法向分量之间的差值，或者在动量空间中引入各向同性时，被计算为维里张量的差值。在这里，我们表明，靠近液-气界面的动能张量的各向异性可构成其表面张力的很大一部分（对于水约为15%，与温度无关）。
