Experimental study on the relationship between extensional and shear rheology of low-viscosity power-law fluids

被引：0

作者：

Matsumoto, Yuzuki ^{[1
]}

Kawaguchi, Misa ^{[1
,2
]}

Tagawa, Yoshiyuki ^{[1
,3
]}

机构：

[1] Tokyo Univ Agr & Technol, Dept Mech Syst Engn, 2-24-16 Nakacho, Koganei, Tokyo 1848588, Japan

[2] Shinshu Univ, Inst Engn, Acad Assembly, 4-17-1 Wakasato, Nagano 3808553, Japan

[3] Tokyo Univ Agr & Technol, Inst Global Innovat Res, 2-24-16 Nakacho, Koganei, Tokyo 1848588, Japan

来源：

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS | 2025年 / 343卷

关键词：

CaBER-doS; Extensional viscosity; Shear-thinning; Power-law fluid; PINCH-OFF DYNAMICS; CAPILLARY BREAKUP; RHEOMETRY; THREADS; LIQUIDS; SURFACE; ROJER; CABER; FLOW;

D O I：

10.1016/j.jnnfm.2025.105436

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper investigates the relationship between extensional and shear viscosity of low-viscosity power-law fluids. We show the first experimental evidence of the conditions satisfying the same power exponents for extensional and shear viscosity, as indicated by the Carreau model. The extensional and shear viscosity are respectively measured by capillary breakup extensional rheometry dripping-onto-substrate (CaBER-DoS) and by a shear rheometer for various Ohnesorge number Oh. The viscosity ranges measured are about O(10(0)) to O(10(4)) mPa s for shear viscosity and O(10(1)) to O(10(3)) mPa s for apparent extensional viscosity. Our experimental results show that, at least for the range of Oh > 1, the power-law expression for the liquid filament radius, apparent extensional viscosity, and shear viscosity holds, even for low-viscosity fluids under our experimental conditions.

引用

页数：10

共 39 条

[1] Elasto-capillary thinning and breakup of model elastic liquids [J].