Cross-stream migration of a Brownian droplet in a polymer solution under Poiseuille flow.

@article{Howard2019CrossstreamMO,
  title={Cross-stream migration of a Brownian droplet in a polymer solution under Poiseuille flow.},
  author={Michael P. Howard and Thomas M Truskett and Arash Nikoubashman},
  journal={Soft matter},
  year={2019},
  volume={15 15},
  pages={
          3168-3178
        }
}
The migration of a Brownian fluid droplet in a parallel-plate microchannel was investigated using dissipative particle dynamics computer simulations. In a Newtonian solvent, the droplet migrated toward the channel walls due to inertial effects at the studied flow conditions, in agreement with theoretical predictions and recent simulations. However, the droplet focused onto the channel centerline when polymer chains were added to the solvent. Focusing was typically enhanced for longer polymers… 
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References

SHOWING 1-10 OF 103 REFERENCES
Inertial and viscoelastic forces on rigid colloids in microfluidic channels.
TLDR
The authors' simulations reveal a significantly stronger fluctuation of the lateral colloid position than expected from thermal motion alone, which originates from the complex interplay between the colloid and polymer chains.
Inertio-capillary cross-streamline drift of droplets in Poiseuille flow using dissipative particle dynamics simulations.
TLDR
The accuracy of the DPD method is assessed and it is concluded that with current computer resources and methods DPD is not readily able to predict cross-stream-line drift for small particle Reynolds number, or for droplets that are less than one tenth the gap size, owing to excessive noise and inadequate numbers of DPD particles per droplet.
Inertial migration of deformable droplets in a microchannel
The microfluidic inertial effect is an effective way of focusing and sorting droplets suspended in a carrier fluid in microchannels. To understand the flow dynamics of microscale droplet migration,…
Thermally modulated cross-stream migration of a surfactant-laden deformable drop in a Poiseuille flow
In the present study, we investigate the cross-stream migration of a deformable droplet suspended in a non-isothermal Poiseuille flow in the presence of bulk-insoluble surfactants. Owing to the…
Motion and deformation of immiscible droplet in plane Poiseuille flow at low Reynolds number
Flow-induced demixing of polymer-colloid mixtures in microfluidic channels.
TLDR
The focusing mechanism can be exploited to separate and capture particles at the sub-micrometer scale using simple microfluidic devices, which is a crucial task for many biomedical applications, such as cell counting and genomic mapping.
Dissipative particle dynamics simulation of droplet suspension in shear flow at low Capillary number
Inertial microfluidics with multi-particle collision dynamics
TLDR
This work investigates inertial focussing in microfluidic channels that gives rise to the Segré-Silberberg effect and introduces a Langevin equation for the cross-sectional motion whose steady state is the Boltzmann distribution that contains the integrated lift force as potential energy.
Single line particle focusing induced by viscoelasticity of the suspending liquid: theory, experiments and simulations to design a micropipe flow-focuser.
We perform 3D numerical simulations, heuristic modeling and microfluidic experiments to demonstrate, for the first time, the presence of a bistability scenario for transversal migration of particles…
Particle Migration due to Viscoelasticity of the Suspending Liquid and Its Relevance in Microfluidic Devices
The fast growth of microfluidic applications based on complex fluids is a result of the unique fluid dynamics of these systems, enabling the creation of devices for health care or biological and…
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