Yield-stress transition in suspensions of deformable droplets

Negro, Giuseppe; Carenza, Livio Nicola; Gonnella, Giuseppe; Mackay, Fraser; Morozov, Alexander; Marenduzzo, Davide

doi:10.1126/sciadv.adf8106

Cited by 8 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These authors showed that, by suppressing cell overlap and increasing the duration of collisions, phase separation was facilitated by deformability. Deformability has also been shown to be important in the analysis of the rheology of a droplet suspension 28 .…”

Section: Discussionmentioning

confidence: 99%

The self-organized structure of glioma oncostreams and the disruptive role of passive cells.

Barberis,

Condat,

Faisal

et al. 2024

Preprint

View full text Add to dashboard Cite

Oncostreams are self-organized structures formed by spindle-like, elongated, self-propelled cells recently described in glioblastomas and especially in gliosarcomas. Cells within these structures either move as large clusters in one main direction, flocks, or as linear, intermingling collections of cells advancing in opposite directions, streams. Round, passive cells are also observed, either inside or segregated from the oncostreams. Here we generalize a recently formulated particle-field approach to investigate the genesis and evolution of these structures, first showing that, in systems consisting only of identical self-propelled cells, both flocks and streams emerge as self-organized dynamic configurations. Flocks are the more stable configurations, while streams are transient and usually originate in collisions between flocks. Stream degradation is easier at low self-propulsion speeds. In systems consisting of both motile and passive cells, the latter block stream formation and accelerate their degradation and flock stabilization. Since the flock appears to be the most effective invasive structure, we thus argue that a phenotype mixture (motile and passive cells) may favor glioblastoma invasion. Oncostreams embody the spontaneous break of symmetry that results from the interplay between speed, shape, and steric repulsion.

show abstract

Section: Discussionmentioning

confidence: 99%

The self-organized structure of glioma oncostreams and the disruptive role of passive cells.

Barberis,

Condat,

Faisal

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Dynamics of the multiple droplets (i.e., translocation [61], coalescence, and permeation [62]) in microchannels are usually related to many engineering applications, i.e., cell migration, chemical mini-reactions, and porous materials. In addition, lab-on-chip microfluidic devices may be key components of high-performance computers (HPCs).…”

Section: Discussionmentioning

confidence: 99%

Pseudopotential Lattice Boltzmann Model for Immiscible Multicomponent Flows in Microchannels

Liu

2023

Processes

View full text Add to dashboard Cite

To investigate droplet formation in a microchannel with different walls, simulations were conducted based on a pseudopotential model using the exact difference method force scheme. The variable surface tension was obtained using Laplace’s law, and the static contact angle was estimated using a first-order linear equation of the corresponding control parameter of the model. The droplet motion in microchannels was simulated using our model, and the effects of surface wettability and the Bond number on the droplet motion were investigated. The droplet motion for the intermediate microchannel wall took a significantly shorter time than that for the hydrophilic wall, and the wet length also depended on the contact angle. As the Bond number increased, the wet length of the droplet decreased on the hydrophilic surface. The droplet formation in a T-junction device was also simulated using the proposed model, and the effects of the capillary number and viscosity ratio on droplet formation were discussed in detail, and some empirical correlations between the capillary number and dimensionless droplet length are presented according to different viscosity ratios. The three flow patterns of droplet formation were categorized by the different capillary numbers as the dripping–squeezing, jetting–shearing, and threading regimes. In the dripping–squeezing regime, the droplet volume was nearly independent of the viscosity ratio, but the viscous effect was more prone to occur in the jetting–shearing regime. In the jetting–shearing regime, as the capillary number increased, the effect of the viscosity ratio on droplet formation became more significant.

show abstract

“…These materials transition from a solid-like state below a critical yield stress to a liquid-like state above it, a behavior pivotal to the functionality of diverse substances ranging from construction materials to personal care products ( 1 , 2 ). This transitional behavior arises from the microstructure interactions like jamming and attractive forces of colloids and gels ( 3 , 4 ), extending even to larger scales in geological and extraterrestrial contexts ( 5–7 ). The inherent elasticity of EVP fluids extends beyond their solid state, shaping their flow characteristics, enabling energy storage, and recovery postdeformation ( 8 ).…”

Section: Introductionmentioning

confidence: 99%

From yield stress to elastic instabilities: Tuning the extensional behavior of elastoviscoplastic fluids

Abdelgawad,

Haward,

Shen

et al. 2024

PNAS Nexus

View full text Add to dashboard Cite

In this study, we delve into the intricacies of elastoviscoplastic (EVP) fluids, particularly focusing on how polymer additives influence their extensional behavior. Our findings reveal that polymer additives significantly alter the extensional properties of the EVP fluids, such as relaxation time and extensional stresses while having negligible impact on the shear rheology. Interestingly, the modified fluids exhibit a transition from yield stress-like behavior to viscoelastic-like behavior under high extensional rates, ultimately leading to destabilization under extreme deformation. This research enhances the fundamental understanding of EVP fluids and highlights potential advancements in applications, especially in precision-demanding fields like 3D printing.

show abstract

Yield-stress transition in suspensions of deformable droplets

Cited by 8 publications

References 58 publications

The self-organized structure of glioma oncostreams and the disruptive role of passive cells.

The self-organized structure of glioma oncostreams and the disruptive role of passive cells.

Pseudopotential Lattice Boltzmann Model for Immiscible Multicomponent Flows in Microchannels

From yield stress to elastic instabilities: Tuning the extensional behavior of elastoviscoplastic fluids

Contact Info

Product

Resources

About