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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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Published on: April 12, 2019

Axisymmetric multiphase lattice Boltzmann method.

Sudhir Srivastava1, Prasad Perlekar, Jan H M ten Thije Boonkkamp

  • 1Department of Applied Physics, Department of Mathematics and Computer Science and J.M. Burgerscentrum, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 16, 2013
PubMed
Summary
This summary is machine-generated.

A new lattice Boltzmann method accurately simulates axisymmetric multiphase flows with varying density. This validated model, based on the Shan-Chen multiphase model, shows excellent agreement for droplet oscillations and capillary breakup simulations.

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Area of Science:

  • Computational fluid dynamics
  • Multiphase flow modeling
  • Numerical analysis

Background:

  • Accurate simulation of multiphase flows is crucial in various scientific and engineering fields.
  • Existing models often face challenges in handling variable density and axisymmetric geometries.
  • The Shan-Chen multiphase model provides a foundation for developing advanced flow simulation techniques.

Purpose of the Study:

  • To present and validate a lattice Boltzmann method for axisymmetric multiphase flows.
  • To adapt the Shan-Chen multiphase model for efficient simulation of axisymmetric flows.
  • To demonstrate the model's capability in handling variable density and complex flow phenomena.

Main Methods:

  • Development of a lattice Boltzmann method tailored for axisymmetric coordinates.
  • Adaptation of the classic Shan-Chen multiphase model for axisymmetric simulations.
  • Analytical validation using Chapman-Enskog expansion for convergence to Navier-Stokes equations.
  • Numerical validation through benchmark test cases, including droplet oscillations and capillary breakup.

Main Results:

  • The lattice Boltzmann method accurately models axisymmetric multiphase flows with variable density.
  • The adapted Shan-Chen model efficiently simulates both single and multiphase flows.
  • Analytical and numerical results show excellent quantitative agreement for benchmark cases.
  • The model successfully reproduces the dynamics of droplet oscillations and capillary breakup.

Conclusions:

  • The presented lattice Boltzmann method offers a robust and accurate approach for simulating axisymmetric multiphase flows.
  • The adapted Shan-Chen model is efficient and reliable for a range of flow problems, including those with variable density.
  • This validated method provides a valuable tool for researchers and engineers in fluid dynamics.