Effect Of Shear Flows On Critical Fluctuations In Fluids
Effect Of Shear Flows On Critical Fluctuations In Fluids
复制标题
剪切流对流体临界波动的影响
DOI：
10.1080/15421407608083893
复制
发表时间：
1976
影响因子：
0.7
通讯作者：
P. Gennes
中科院分区：
文献类型：
--
作者：
P. Gennes
摘要剪切流使序参数为m的流体系统的等时关联函数发生扭曲，恰好在临界点以上。我们在这里分析了m不是守恒量的情况下的这种效应：可以找到过渡近晶CC→近晶A或可能近晶A→向列相的物理例子。我们发现了波矢k涨落的一个重要的各向异性的减缩，其中kζ>；1假设ST>；1(其中ζ是一致模的相关长度，τ是松弛时间)。
Abstract A shear flow distorts the equal time correlation functions for a fluid system with order parameter m, just above a critical point. We analyse this effect here for the case where m is not a conserved quantity : physical examples may be found with the transition smectic Cc → smectic A or possibly smectic A→ nematic. We find an important, anisotropic, reduction of fluctuations of wave vector k where kζ > 1 provided that ST > 1 (where ζ is the correlation length and τ the relaxation time of the uniform mode).