Shear-induced structure change in shear-banding of a wormlike micellar solution in concentric cylinder flow

Ito, Masatoshi; Yoshitake, Yumiko; Takahashi, Tsutomu

doi:10.1122/1.4961034

Cited by 12 publications

(11 citation statements)

References 32 publications

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“…Some types of wormlike micellar solutions have attracted research attention because they generate shear-induced and shear-banding structures [4][5][6][7][8][9][10] . As already mentioned, traditional FIB measurements such as the crossed-Nicol method have some limitations.…”

Section: Couette Flowmentioning

confidence: 99%

“…As already mentioned, traditional FIB measurements such as the crossed-Nicol method have some limitations. Ito et al 8) developed a new technique using hue as color information to evaluate the distribution of the stress-optical coefficient. This technique is very inexpensive, requiring only a white-light source, two polarizer sheets (as in the crossed-Nicol method), and a digital camera.…”

Section: Couette Flowmentioning

confidence: 99%

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Experimental Studies of Flow-Induced Birefringence in Complex Fluids

Sato

2022

J. Soc. Rheol., Jpn

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To elucidate the mechanism for flow phenomena in complex fluids, it is crucial to analyze the associated flow-induced structures both experimentally and numerically. Flow-induced birefringence (FIB) measurement is an optical measurement that is very useful for analyzing flow-induced structures in complex fluids, which is why many studies have used the FIB technique. Furthermore, various recent studies have developed new devices for measuring FIB. Reviewed briefly here are recent experimental studies that have applied the FIB technique to complex fluids such as surfactant solutions, fiber suspensions, and polymer fluids.

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Section: Couette Flowmentioning

confidence: 99%

Section: Couette Flowmentioning

confidence: 99%

Experimental Studies of Flow-Induced Birefringence in Complex Fluids

Sato

2022

J. Soc. Rheol., Jpn

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“…(13), |C| is estimated as 4 × 10 −3 = O(10 −3 Pa −1 ). In comparison, the order of |C| was measured as O(10 −7 Pa −1 ) in wormlike micellar solutions [29,30]. For the solid materials, the |C| values are frequently expressed in the unit of Brewster (= 10 −12 Pa −1 ).…”

Section: B Association Of Color With Shear Stress τ θmentioning

confidence: 99%

Applicability evaluation of the stress-optic law in Newtonian fluids toward stress field measurements

Noto

Tasaka

Hitomi

et al. 2020

Phys. Rev. Research

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A novel rheoscopic fluid displaying coloration due to flow-induced birefringence is investigated through laboratory experiments to ascertain if it satisfies the stress-optic law in fluids in direct stress field measurements of Newtonian fluids. To validate this experimentally, two types of spin-up experiments ensuring two-dimensional flows were performed: color visualization using the rheoscopic fluid and velocity field measurement by particle image velocimetry. Using a wave-number analysis, the orientation angle of the birefringence was determined from a single color snapshot in axisymmetric and unidirectional flows. Direct comparisons between color and shear stress values made it possible to establish a unique relation between the two, verifying that the stress-optic law can be applied in the fluid. The results of the present study suggest a promising avenue toward enabling temporally and spatially resolved stress field measurements in Newtonian fluids.

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“…For ensuring requisite assumptions of standard rheometer test, a narrow gap is usually set at measurement compartment. The assumptions for the rheometer, however, are not always satisfied due to the complex dynamics of non-Newtonian fluid, such as shear history effect, 1) shear banding, [2][3][4] wall-slip, 5,6) elastic instability, [7][8][9] and more. Furthermore, it is clearly observed that fluids with multi-phase dispersion cannot be measured due to jamming.…”

Section: Introductionmentioning

confidence: 99%

Overview of Ultrasonic Spinning Rheometry: Application to Complex Fluids

Yoshida

Tasaka

Ohie

et al. 2022

J. Soc. Rheol., Jpn

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A novel rheometry termed ultrasonic spinning rheometry (USR) is overviewed in this paper. This methodology utilizes ultrasonic velocity profiling as a representative velocimetry for various complex fluids including multi-phase state. The USR determines optimal properties from cost function which is calculated from both equation of motion and constitutive equation of test fluids by substituting the measured velocity profiles. Various examples are explained to indicate the applicability and efficacy of USR for measuring complex fluids; silicon oil, polymer solution, clay dispersion, water-oil two-phase fluid, and more. Through these results, we discussed future prospects of USR developments regarding its applicability and efficacy.

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Shear-induced structure change in shear-banding of a wormlike micellar solution in concentric cylinder flow

Cited by 12 publications

References 32 publications

Experimental Studies of Flow-Induced Birefringence in Complex Fluids

Experimental Studies of Flow-Induced Birefringence in Complex Fluids

Applicability evaluation of the stress-optic law in Newtonian fluids toward stress field measurements

Overview of Ultrasonic Spinning Rheometry: Application to Complex Fluids

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