Low-frequency shear elasticity of liquids

Бадмаев, Б. Б.; Бальжинов, С. А.; Дамдинов, Б. Б.; Дембелова, Т. С.

doi:10.1134/s1063771010050076

Cited by 14 publications

(5 citation statements)

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“…Our data require a

of several microseconds, hence orders of magnitude longer than structural relaxations. Furthermore, it is in line with a dominating single and long relaxation time

and defies the presence of considerable dissipation via other shorter relaxations ( 14 , 17 , 18 ) as it could be the case for models with a spectrum of structural relaxation time scales as the generalized Maxwell model ( SI Appendix , section E ) or others ( 1 – 4 , 32 ). The presence of shorter relaxation times might still produce a motion of δm appearing sine-like ( SI Appendix , section G ) on quarter-period observation.…”

Section: Resultsmentioning

confidence: 67%

“…The striking increase in relaxation time requires structures within the fluid with related and equally large relaxation times. Instead of single molecules subject to fast diffusion, groups of molecules must form that are displaced in a correlated and collective manner ( 12 , 17 , 18 , 35 ), thus providing much longer time constants than the single molecule. Understanding these collective excitations in disordered systems is of vital importance.…”

Section: Discussionmentioning

confidence: 99%

“…For

the existence of shear elasticity requires long range correlations and challenges our understanding of the liquid state ( 10 – 13 ). Nonzero shear elasticity in fluids has been identified by mostly periodic approaches either under infinitesimal strains at high frequencies of GHz down to about 0.1 MHz ( 4 , 5 , 8 , 14 – 18 ) or, remarkably, at very low frequencies with minuscule contributions ( 19 – 21 ).…”

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confidence: 99%

See 2 more Smart Citations

Rubber-like elasticity in laser-driven free surface flow of a Newtonian fluid

Kayanattil

Huang

Gitaric

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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The energy needed to deform an elastic solid may be recovered, while in Newtonian fluids, like water and glycerol, deformation energy dissipates on timescales of the intermolecular relaxation time τ M . For times considerably longer than τ M the existence of shear elasticity requires long-range correlations, which challenge our understanding of the liquid state. We investigated laser-driven free surface bubbles in liquid glycerol by analyzing their expansion and bursting dynamics, in which we found a flow-dominating, rubber-like elasticity unrelated to surface tension forces. In extension to findings of a measurable liquid elasticity at even very low deformation frequencies [L. Noirez, P. Baroni, J. Mol. Struct. 972 , 16–21 (2010), A. Zaccone, K. Trachenko, Proc. Natl. Acad. Sci. U.S.A. 117 , 19653–19655 (2020)], that is difficult to access under increased strain, we find a robust, strain rate driven elasticity. The recovery of deformation energy allows the bursting bubble to reach Taylor–Culick velocities 20-fold higher than expected. The elasticity is persistent for microseconds, hence four orders of magnitude longer than τ M . The dynamic shows that this persistence cannot originate from the far tail of a distribution of relaxation times around τ M but must appear by frustrating the short molecular dissipation. The longer time should be interpreted as a relaxation of collective modes of metastable groups of molecules. With strain rates of 10 6 s −1 , we observe a metastable glycerol shell exhibiting a rubber-like solid behavior with similar elasticity values and characteristic tolerance toward large strains, although the molecular interaction is fundamentally different.

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“…Our data require a

of several microseconds, hence orders of magnitude longer than structural relaxations. Furthermore, it is in line with a dominating single and long relaxation time

Section: Resultsmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

“…For

mentioning

confidence: 99%

See 1 more Smart Citation

Rubber-like elasticity in laser-driven free surface flow of a Newtonian fluid

Kayanattil

Huang

Gitaric

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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“…The settled lifetime of individual molecules of ordinary low-viscosity fluids can be estimated at 10 -11 to 10 -12 s. However, the fundamental works of Bazaron et al [1][2][3] show that shear elasticity of liquids can be observed at relatively low frequencies of below 10 5 Hz. We studied the complex shear modulus of liquids and suspensions of nanoparticles using resonance equipment with a quartz crystal [4,5]. Typically, the liquid sample is placed in the gap between the oscillating piezoelectric quartz and the solid quartz cover-plate.…”

Section: Resonance Methodsmentioning

confidence: 99%

Mechanical Properties of Viscous Liquids and Nanosuspensions

Дамдинов

Дембелова

Baloshin

et al. 2018

SSP

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Following the fundamental work by Bazaron, Bulgadaev and Derjaguin [6] on the observation of shear elasticity of low viscous liquids, we build on this study by examining viscous liquids, polymers and suspensions of nanoparticles. In this paper, we review our past and current efforts in these areas. The mechanical properties of liquids, polymers and nanosuspensions have been studied at relatively low frequencies of 105 Hz. The real and imaginary shear moduli of these samples were obtained on equipment using the acoustic resonance technique. It was shown that the shear modulus and viscosity decreases with increasing shear deformation. The behavior of viscoelastic fluids near surfaces is similar to that of colloidal and polymer suspensions, suggesting that the liquid component is determined by the mechanical response of suspensions.

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“…Investigation of low-frequency shear elasticity of liquids carried out using acoustic resonance method [1][2][3][4][5][6] give evidence that in liquids there is a low-frequency viscoelastic relaxation process with more relaxation period than according to classical theories [7]. Apparently, in a number of cases, collective effects dependent on mutual position and interaction of large groups of molecules (clusters) are of critical importance.…”

Section: Introductionmentioning

confidence: 99%

Structural Research of Nanoparticles Dispersions

Дамдинов

Дембелова

Бадмаев

et al. 2019

SSP

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In this paper we report on investigation of the viscoelastic and rheological properties of early synthesized and characterized nanosuspensions by acoustical method, allowing to obtain the characteristic curves of shear elastic moduli and to assess the degree of "hardening" and structuring of the suspension. The paper is rising the question of fundamental problem - the structuring the nanosuspension, that might shed a light on the possibility of "engineering" the structure of a liquid by controlling and regulating the degree and nature of intermolecular interaction.

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Low-frequency shear elasticity of liquids

Cited by 14 publications

References 0 publications

Rubber-like elasticity in laser-driven free surface flow of a Newtonian fluid

Rubber-like elasticity in laser-driven free surface flow of a Newtonian fluid

Mechanical Properties of Viscous Liquids and Nanosuspensions

Structural Research of Nanoparticles Dispersions

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