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Related Concept Videos

Colloids and Suspensions01:17

Colloids and Suspensions

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
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Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
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Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Molecular compounds or covalent compounds result when atoms share electrons to form covalent bonds. Since there is no electron transfer, molecular compounds do not contain ions; instead, they consist of discrete, neutral molecules. 
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High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
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Mesoscopic electrohydrodynamic simulations of binary colloidal suspensions.

Nicolas Rivas1, Stefan Frijters2, Ignacio Pagonabarraga3

  • 1Forschungszentrum Jülich, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Fürther Straße 248, 90429 Nürnberg, Germany.

The Journal of Chemical Physics
|April 16, 2018
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Summary
This summary is machine-generated.

This study introduces a novel computational model for simulating electrokinetic phenomena in colloidal suspensions. The model integrates fluid dynamics, electrokinetics, and colloid behavior for advanced analysis.

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Area of Science:

  • Computational physics
  • Fluid dynamics
  • Colloid science

Background:

  • Electrokinetic phenomena are crucial in colloidal suspensions.
  • Existing models often lack integrated simulation of hydrodynamics, electrokinetics, and colloid behavior.

Purpose of the Study:

  • To develop and validate a comprehensive computational model for electrokinetic phenomena in colloidal suspensions.
  • To enable the simulation of complex fluid-solute-colloid interactions.

Main Methods:

  • Lattice Boltzmann method for binary fluid flows with a Bhatnagar-Gross-Krook collision operator.
  • Pseudopotential model for fluid-fluid and fluid-solute interactions.
  • Finite difference discretization of the Nernst-Planck equation using the link-flux method.
  • Coupling of colloids to hydrodynamics and electrokinetics via boundary conditions.

Main Results:

  • Successful integration of discrete Boltzmann equation, Nernst-Planck equation, and colloid dynamics.
  • Validation against analytical solutions for ionic distributions, droplet deformation, and electrophoretic mobility.
  • Demonstration of model's capability in simulating droplet breakup and interfacial colloidal dynamics.

Conclusions:

  • The presented model offers a unified framework for simulating electrokinetic phenomena in complex fluid mixtures.
  • This integrated approach advances the understanding of colloidal behavior in various fluid interfaces and dynamic systems.
  • The validated model opens new avenues for exploring charged and neutral droplet dynamics and interfacial colloidal transport.