Yield stress and elastic modulus of suspensions of noncolloidal particles in yield stress fluids

By Fabien Mahaut, X. Chateau, P. Coussot, G. Ovarlez. 2008

204 citations recorded by the source corpus.

We study experimentally the behavior of isotropic suspensions of noncolloidal particles in yield stress fluids. This problem has been poorly studied in the literature, and only on specific materials. In this paper, we manage to develop procedures and materials that allow us to focus on the purely mechanical contribution of the particles to the yield stress fluid behavior, independently of the physicochemical properties of the materials. This allows us to relate the macroscopic properties of these suspensions to the mechanical properties of the yield stress fluid and the particle volume fraction, and to provide results applicable to any noncolloidal particle in any yield stress fluid. We find that the elastic modulus-concentration relationship follows a Krieger-Dougherty law, and we show that the yield stress-concentration relationship is related to the elastic modulus-concentration relationship through a very simple law, in agreement with results from a micromechanical analysis.

Subfields: Computational Mechanics, Fluid Flow and Transfer Processes, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/7a5751bfcc0c6f0f1f748c864241f56cd32ec85e

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In Computational Mechanics

In Fluid Flow and Transfer Processes

In Mechanics of Materials

Citations in the corpus

Describing and prescribing the constitutive response of yield stress fluids using large amplitude oscillatory shear stress (LAOStress) (2013, background): “…microstructure of these gels typically consists of highly swollen and compressed sphericalshaped blobs (of characteristic dimension ∼ 5 µm) which, at high enough concentrations, provide the material with its yield stress (Ketz et al., 1988; Carnali and Naser, 1992; Piau, 2007; Mahaut et al., 2008).”
Yielding to Stress: Recent Developments in Viscoplastic Fluid Mechanics (2014, background): “…or bubbles on bulk viscosity and yield stress has been evaluated both theoretically and experimentally (Chateau et al. 2008, Kogan et al. 2013, Mahaut et al. 2008), and we now have a characterization of rheological properties according to the volume fraction and properties of the interstitial…”
Yield stress fluid flows: A review of experimental data (2014, background): “It seems that the rheological properties of yield stress fluids in the solid regime vary as widely as for usual solids, ranging from almost purely linear elasticity (for concentrated emulsions) [14-15] to complex elastoplasticity for cement paste [16] through non-linear viscoelasticity for Carbopol ”
On the existence of a simple yield stress fluid behavior (2012, background): “3% volume fraction in water (see [37] for details).”
The solid–fluid transition in a yield stress shear thinning physical gel (2009, background): “are known to be very stable over extended periods of time, slight variations of their elastic modulus (typically 5% of the startup value) under continuous forcing have been previously reported (e.g., in Mahaut et al. 2008 ) and are probably related to changes in the microstructure induced by the co”
Effect of Coarse Particle Volume Fraction on the Yield Stress and Thixotropy of Cementitious Materials (2008, unknown): “A doi:10.1016/j.cemconres.2008.06.001 A B S T R A C T A R T I C L E I N F O Article history: In order to help in modelli Received 15 February 2008 Accepted 4 June 2008 Keywords: Fresh concrete Rheology Aggregate Cement paste Modelling ng the yield stress of fresh concrete, we study the behavior of…”
Homogenization approach to the behavior of suspensions of noncolloidal particles in yield stress fluids (2008, methodology): “Figure 4: Dimensionless elastic modulus G/G vs the beads volume fraction φ for all the systems studied by Mahaut et al. (2007). The open square symbols are suspensions of polystyrene and glass beads in bentonite, the open circle symbols are suspensions of glass beads in carbopol while the solid diam”