Determination of yield stress fluid behaviour from inclined plane test

1995 ◽  
Vol 34 (6) ◽  
pp. 534-543 ◽  
Author(s):  
Philippe Coussot ◽  
St�phane Boyer
Keyword(s):  
Yield Stress ◽  
Inclined Plane ◽  
Yield Stress Fluid ◽  
Fluid Behaviour ◽  
Inclined Plane Test

Determination of Yield Stress from Initiation of Motion on an Inclined Plane

2000 ◽  
Vol 20 (1) ◽  
pp. 93-114 ◽  
Author(s):  
P.H.T. UHLHERR ◽  
TUNAN FANG ◽  
ZIQIANG ZHOU
Keyword(s):  
Yield Stress ◽  
Inclined Plane

An attempt to categorize yield stress fluid behaviour

2009 ◽  
Vol 367 (1909) ◽  
pp. 5139-5155 ◽  
Author(s):  
Peder Moller ◽  
Abdoulaye Fall ◽  
Vijayakumar Chikkadi ◽  
Didi Derks ◽  
Daniel Bonn
Keyword(s):  
Shear Stress ◽  
Experimental Determination ◽  
Yield Stress ◽  
Shear Banding ◽  
Ongoing Debate ◽  
Yield Stress Fluids ◽  
Dense Suspensions ◽  
Experimental Protocols ◽  
Fluid Behaviour

We propose a new view on yield stress materials. Dense suspensions and many other materials have a yield stress—they flow only if a large enough shear stress is exerted on them. There has been an ongoing debate in the literature on whether true yield stress fluids exist, and even whether the concept is useful. This is mainly due to the experimental difficulties in determining the yield stress. We show that most if not all of these difficulties disappear when a clear distinction is made between two types of yield stress fluids: thixotropic and simple ones. For the former, adequate experimental protocols need to be employed that take into account the time evolution of these materials: ageing and shear rejuvenation. This solves the problem of experimental determination of the yield stress. Also, we show that true yield stress materials indeed exist, and in addition, we account for shear banding that is generically observed in yield stress fluids.

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