Imbibition of Liquid Helium in Aerogels

被引：0

作者：

P. Spathis

A. Delga

C. Malheiro

P. E. Wolf

机构：

[1] Institut Néel,

[2] CNRS et Université Joseph Fourier,undefined

来源：

Journal of Low Temperature Physics | 2013年 / 171卷

关键词：

Aerogels; Imbibition; Superfluidity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We report optical measurements of the imbibition of liquid helium in a sample of silica aerogel with 90 % porosity. Both direct imaging and light scattering experiments were performed to determine the dynamics and the properties of the liquid-gas interface in both the normal and superfluid phases of liquid helium. In the normal phase, a classical Lucas Washburn behavior is observed for the rise of the imbibition front while the behavior in the superfluid phase is markedly different, as the fluid invades the sample from all sides with a constant speed. In both phases, the interface is rough, leading to light scattering. In addition, condensation ahead of the imbibition front is observed at low temperature in the superfluid phase.

引用

页码：693 / 698

页数：5

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