Dilute dispersion of compound particles: deformation dynamics and rheology

Singeetham, Pavan Kumar; S., Chaithanya K. V.; Thampi, Sumesh P.

doi:10.1017/jfm.2021.233

Cited by 3 publications

(3 citation statements)

References 73 publications

(136 reference statements)

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“…Recently, we analyzed the time-dependent deformation dynamics and non-Newtonian rheology of a dilute dispersion of compound particles in a generalized linear flow using analytical methods. 26,27 Zhang et al 28 reported the non-monotonic variation of viscosity and yield stress in the dense suspension of compound particles. Apart from interesting rheological properties, 27 these structures are associated with rich dynamics and hydrodynamic flows.…”

Section: Introductionmentioning

confidence: 99%

“…26,27 Zhang et al 28 reported the non-monotonic variation of viscosity and yield stress in the dense suspension of compound particles. Apart from interesting rheological properties, 27 these structures are associated with rich dynamics and hydrodynamic flows. 26,29 For instance, in our previous study, we have shown that the hydrodynamic resistance offered by the concentric compound particles can be varied significantly by varying the size of the confining droplet relative to the encapsulated particle and the viscosity of the droplet fluid and the continuous fluid.…”

Section: Introductionmentioning

confidence: 99%

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Active compound particles in a quadratic flow: hydrodynamics and morphology

K. V. S.,

Singeetham,

Thampi

2023

Soft Matter

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active compound particles in a quadratic flow: hydrodynamics and morphology

K. V. S.,

Singeetham,

Thampi

2023

Soft Matter

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“…By contrast, droplets/bubbles deform in linear shear flows, and end up resting in steady flows or breaking up when viscous force exerted by the surrounding fluid dominates surface tension (Stone 1994). The dynamics of droplets in shear is characterised by droplet deformation, resulting from the competition among viscous shear, inertia and surface tension (Singh & Sarkar 2011; Singeetham, Chaithanya & Thampi 2021; Yi et al. 2022).…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional Janus drops in shear: deformation, rotation and their coupling

Zhang,

Chen,

Qian

et al. 2023

J. Fluid Mech.

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In this work, the dynamics of two-dimensional rotating Janus drops in shear flow is studied numerically using a ternary-fluid diffuse interface method. The rotation of Janus drops is found to be closely related to their deformation. A new deformation parameter $D$ is proposed to assess the significance of the drop deformation. According to the maximum value of $D$ ( $D_{max}$ ), the deformation of rotating Janus drops can be classified into linear deformation ( $D_{max}\le 0.2$ ) and nonlinear deformation ( $D_{max}> 0.2$ ). In particular, $D_{max}$ in the former depends linearly on the Reynolds and capillary numbers, which can be interpreted by a mass–spring model. Furthermore, the rotation period $t_R$ of a Janus drop is found to be more sensitive to the drop deformation than to the aspect ratio of the drop at equilibrium. By introducing a corrected shear rate and an aspect ratio of drop deformation, a rotation model for Janus drops is established based on Jeffery's theory for rigid particles, and it agrees well with our numerical results.

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