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Anisotropic bidispersive convection.

B Straughan1

  • 1Department of Mathematical Sciences, Durham University, Durham DH1 3LE, UK.

Proceedings. Mathematical, Physical, and Engineering Sciences
|August 20, 2019
PubMed
Summary
This summary is machine-generated.

This study explores thermal convection in anisotropic bidisperse porous media, revealing novel cell structures due to distinct micro and macro pore permeabilities. These findings advance understanding of fluid flow in complex porous systems.

Keywords:
anisotropic permeabilitybidispersive porous medianonlinear stabilitythermal convection

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Area of Science:

  • Geophysics
  • Fluid Dynamics
  • Materials Science

Background:

  • Bidisperse porous media contain both macropores and micropores.
  • Anisotropic permeability in porous media complicates fluid flow analysis.

Purpose of the Study:

  • Investigate thermal convection in anisotropic bidisperse porous media.
  • Analyze the impact of distinct macro and micro permeability tensors on convection patterns.

Main Methods:

  • Linear instability analysis.
  • Inferred fully nonlinear stability analysis.
  • Calculations of Rayleigh number and wavenumber.

Main Results:

  • Identified novel convection cell structures not observed in single porosity media.
  • Demonstrated the influence of six independent permeability coefficients on instability.
  • Predicted unique cellular patterns arising from anisotropic bidisperse properties.

Conclusions:

  • Anisotropic bidisperse porous media exhibit complex thermal convection behaviors.
  • The distinct permeability characteristics lead to novel flow structures.
  • This research provides insights into fluid dynamics within heterogeneous porous materials.