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Related Experiment Video

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Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
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Lattice Boltzmann model for three-phase viscoelastic fluid flow.

Chiyu Xie1, Wenhai Lei1, Moran Wang1

  • 1Department of Engineering Mechanics and CNMM, Tsinghua University, Beijing 100084, China.

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|March 18, 2018
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Summary

A new lattice Boltzmann framework simulates three-phase viscoelastic fluid flows. Enhanced polymer viscosity and elastic modulus improve oil recovery in complex geometries.

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Area of Science:

  • Computational Fluid Dynamics
  • Rheology
  • Multiphase Flow

Background:

  • Simulating multiphase flows with viscoelasticity in complex geometries is challenging.
  • Existing models may struggle with mass conservation and accurately capturing viscoelastic effects.

Purpose of the Study:

  • To develop a robust lattice Boltzmann framework for three-phase viscoelastic fluid flows.
  • To accurately incorporate Maxwell viscoelastic constitutive relations into the lattice Boltzmann method.
  • To investigate the impact of viscoelastic parameters on fluid displacement processes.

Main Methods:

  • A Rothman-Keller type model for immiscible multiphase flows.
  • Incorporation of the Maxwell constitutive relation into the momentum equation.
  • Development of a modified lattice Boltzmann evolution equation for Maxwell fluids.
  • Removal of the excess viscous term to prevent simulation errors.

Main Results:

  • The developed lattice Boltzmann framework accurately simulates three-phase viscoelastic flows.
  • The removal of the excess viscous term is crucial for accurate simulations.
  • Increased polymer intrinsic viscosity and elastic modulus significantly enhance oil recovery.

Conclusions:

  • The proposed lattice Boltzmann method provides a reliable tool for simulating complex viscoelastic multiphase flows.
  • This framework can be applied to optimize processes like enhanced oil recovery.
  • Viscoelastic properties play a critical role in the efficiency of fluid displacement.