Strong squeeze flows of yield-stress fluids: The effect of normal deviatoric stresses

Pelot, D. D.; Sahu, Rakesh P.; Sinha-Ray, Suman; Yarin, Alexander L.

doi:10.1122/1.4794912

Cited by 12 publications

(6 citation statements)

References 31 publications

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“…This process created a gel with a yield stress in shear of 570 ±94 Pa (based on the four measurements shown in Fig. 2b), found using the squeezing apparatus described in Pelot et al (2013). In short, the squeeze flow experiments utilized a constant squeezing force to compress a cylindrically shaped material between two large parallel plates.…”

Section: Experimental Materials and Apparatusmentioning

confidence: 99%

“…Next, the effective viscosity of the fluid is calculated using the measured force, moment, and wedge geometry and compared to the rheological parameters found using a rheometer with parallel plate geometry. A Carbopol solution is used in this experiment because it is known to be a yield stress fluid, mimics the soft solids mentioned above, and is ideal for particle image velocimetry (Pelot et al 2013). The rheological parameters were measured using parallel plate rheometer with rough and smooth plates, and approximately, the same results were found.…”

Section: Introductionmentioning

confidence: 99%

“…This is an indication that the no-slip condition held in the present case on smooth plates, and the results for the latter are included. Moreover, in Pelot et al (2013), flow near the boundaries was visualized during viscosity measurements. It was shown that the no-slip boundary condition holds up to the shear rates of the order of 100 1/s.…”

Section: Introductionmentioning

confidence: 99%

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Spreading of Carbopol gels

2016

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This work aims to study flows within a wedge at the inclination angles in the 5°-20°range. Flow within a wedge occurs when a Carbopol solution is pulled horizontally by a moving conveyer belt through the wedge apex opening at different speeds. The upper side of the wedge is fixed at the exit by a pivot joint about which it could rotate. At the wedge entrance, a force gauge is placed so that it is pushing at the upper side of the wedge to keep it at a predetermined position (and thus at a predetermined inclination angle). The gauge measures the restraining force required to counteract the pressure buildup on the flowing Carbopol solution side and to keep the upper side of the wedge at its position. Visualization through the transparent vertical sides of the wedge was used to track seeding particles inside the solution to reconstruct the velocity profile and in particular to reveal plug flow regions characteristic of the yield stress liquids.

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Section: Experimental Materials and Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spreading of Carbopol gels

2016

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“…Food materials are squeezed between the tongue and palate as they move together during mastication, and strong elongational flow is created. Some instrumental methods do include both types of flow, such as tribology (see earlier), squeezing flow rheology (Campanella and Peleg, 2002;Chatraei et al, 1981;Corradini and Peleg, 2005;Pelot et al, 2013), and "imperfect" squeezing flow rheology (Damrau and Peleg, 1997;Suwonsichon and Peleg, 1999;Terpstra et al, 2007). Some instrumental methods do include both types of flow, such as tribology (see earlier), squeezing flow rheology (Campanella and Peleg, 2002;Chatraei et al, 1981;Corradini and Peleg, 2005;Pelot et al, 2013), and "imperfect" squeezing flow rheology (Damrau and Peleg, 1997;Suwonsichon and Peleg, 1999;Terpstra et al, 2007).…”

Section: Extensional/elongational Flow Rheologymentioning

confidence: 99%

Structure and texture development of food-emulsion products

Chung

McClements

2015

Modifying Food Texture

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“…1 A study that was published in February shows that under basic 1-dimensional flow conditions the Herschel-Bulkley model describes the fluid flow of Carbopol sufficiently. 2 According to the manufacturer (Lubrizol R ), it has high relative viscosity, high yield stress, and is a clear gel when neutralized. 3 Carbopols shear thinning behavior can be described by the Herschel-Bulkley model…”

Section: Introductionmentioning

confidence: 99%

Spreading of a Herschel-Bulkley fluid using lubrication approximation

Klep

Pelot

Yarin

2014

J Undergrad Research UIC

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In this work the flow of 1.5% Carbopol-940 solution was studied as it was transported through a wedge-like system at different angles, entrance heights, exit heights, and velocities. The high-speed video recordings of the flow were processed by tracking air bubbles entrapped in the solution. This data was used to find the velocity field of the solution beneath the wedge. Also, the force imposed by the solution on the inclined top plate of the wedge was measured. The theoretical description in the framework of the lubrication approximation for Newtonian fluids was used for comparison to the experimental results. It was found that Herschel-Bulkley fluids exhibit qualitatively similar behavior to the Newtonian fluid, such as the reverse flow near the top of the wedge. Overall, this work proves that the lubrication approximation can be effectively used to characterize the flow field of non-Newtonian Herschel-Bulkley fluids at the wedge angles at least up to 20 degrees.

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Strong squeeze flows of yield-stress fluids: The effect of normal deviatoric stresses

Cited by 12 publications

References 31 publications

Spreading of Carbopol gels

Spreading of Carbopol gels

Structure and texture development of food-emulsion products

Spreading of a Herschel-Bulkley fluid using lubrication approximation

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