Experimental tests of the scaling relation for textured materials in mixtures of two immiscible fluids
作者:
Yoshiaki Takahashi,
Naoki Kurashima,
Ichiro Noda,
Masao Doi,
期刊:
Journal of Rheology
(AIP Available online 1994)
卷期:
Volume 38,
issue 3
页码: 699-712
ISSN:0148-6055
年代: 1994
DOI:10.1122/1.550481
出版商: The Society of Rheology
关键词: SCALING LAWS;TEXTURE;MIXTURES;VISCOSITY;STRESSES;IMMISCIBILITY;SHEAR FLOW;TRANSIENTS;SILICONES;RESINS;RHEOLOGY
数据来源: AIP
摘要:
To examine the scaling relation proposed for textured materials, viscoelastic properties of binary mixtures of immiscible Newtonian fluids were measured in steady shear flows and in the transient states after step changes of the shear rate. The sample was a mixture of silicone oil and resin oil, which have almost equal density and viscosity. It was observed that (i) the shear stress and the first normal stress difference, under the steady shear flows, are almost proportional to the shear rate, and that (ii) the plots of the scaled transient stresses after a step change of shear rate, against the scaled strain, compose a single curve. These results can be well explained by the scaling relation. However, the shape of the transient stress curves after step changes of shear rate do not agree with that predicted by the constitutive equation proposed by Doi and Ohta.
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