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Related Concept Videos

Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

Thermostating highly confined fluids.

Stefano Bernardi1, B D Todd, Debra J Searles

  • 1Centre for Molecular Simulation, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia. sbernardi@ict.swin.edu.au

The Journal of Chemical Physics
|July 2, 2010
PubMed
Summary
This summary is machine-generated.

Thermostatting methods and wall rigidity significantly impact confined nanofluid properties. Rigid walls reduce fluid slip, while thermostat placement affects pressure, velocity, and density dynamics.

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Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography
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Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography
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Published on: February 25, 2015

Area of Science:

  • Physics
  • Materials Science
  • Chemical Engineering

Background:

  • Confined nanofluids exhibit unique properties influenced by system boundaries.
  • Understanding these properties is crucial for applications in nanotechnology and materials science.

Purpose of the Study:

  • To investigate the influence of thermostatting strategies and wall modeling on nanofluid dynamics.
  • To analyze mechanical and dynamical properties under different confinement conditions.

Main Methods:

  • Nonequilibrium molecular dynamics simulations of a two-dimensional fluid in Couette flow.
  • Comparison of fluid-thermostated versus wall-thermostated systems.
  • Analysis of systems with rigid and vibrating atomic walls.

Main Results:

  • Thermostatting method and wall rigidity critically alter pressure tensor, streaming velocity, and density profiles.
  • Lyapunov exponents indicate sensitive changes in fluid chaoticity.
  • Rigid walls significantly reduce fluid slip at the interface.

Conclusions:

  • The choice of thermostatting and wall conditions profoundly affects simulated nanofluid behavior.
  • Results caution against direct fluid thermostatting or rigid wall assumptions in simulations.
  • Findings are relevant for modeling systems like water in carbon nanotubes.