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A Parallel Coupled Lattice Boltzmann-Volume of Fluid Framework for Modeling Porous Media Evolution.

Hussein Alihussein1, Martin Geier1, Manfred Krafczyk1

  • 1Institute for Computational Modeling in Civil Engineering (iRMB), TU Braunschweig, Pockelsstr. 3, 38106 Braunschweig, Germany.

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Summary

This study enhances porous media simulations using advanced lattice Boltzmann methods (LBMs) for accurate transport and reaction modeling. The new framework improves understanding of multi-scale processes, crucial for complex material analysis.

Keywords:
dissolutionhydrated cement paste microstructureslattice Boltzmann methodvolume of fluid

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Area of Science:

  • Multiphase flow and reactive transport in porous media.
  • Computational physics and materials science.

Background:

  • Simulating physical/chemical processes in porous materials across scales is vital for understanding.
  • Geometric complexity and resolution needs in pore-scale simulations lead to high computational costs.
  • Efficient parallelization is essential for timely simulation results.

Purpose of the Study:

  • To develop and improve a framework for modeling and simulating transport and reaction processes in porous media.
  • To enhance existing lattice Boltzmann methods (LBMs) for accurate prediction of coupled mass transport and reaction.
  • To integrate advanced methods into the VirtualFluids research code.

Main Methods:

  • Utilized the factorized central moment lattice Boltzmann method (LBM) for second-order accurate transport modeling.
  • Employed the volume of fluid (VOF) method with the piece-wise linear interface construction (PLIC) algorithm for modeling morphological changes.
  • Integrated these methods into the VirtualFluids LBM research code.

Main Results:

  • Successfully validated the developed framework against analytical test cases.
  • Demonstrated the framework's capability through an application simulating diffusion-controlled dissolution in a pore space derived from CT scans.
  • Achieved reliable and accurate prediction of combined mass transport and reaction effects.

Conclusions:

  • The enhanced LBM framework provides a robust tool for multi-scale simulations in porous media.
  • The integration of VOF-PLIC addresses morphological changes crucial for dissolution processes.
  • The validated approach enables accurate analysis of complex reactive transport phenomena in real-world porous materials.