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March 5, 2026Physics of Fluids

Stability analysis of an anisotropic bidisperse porous media: The effect of throughflow and depth-dependent viscosity

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Authors

SCShobhanbabu ChithramRRRavi RagojuNational Institute of Technology GoaPNP. A. L. NarayanaIndian Institute of Technology Hyderabad

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Implication

This analysis demonstrates the effects of viscosity and flow direction on thermal convection in bidisperse porous media, suggesting complex interactions.

Key Points

  • The research aims to explore how variable viscosity influences thermal convection in a bidisperse porous medium under Darcy's model.
  • Utilized linear and nonlinear stability analyses
  • Examined effects of uniform vertical throughflow and depth-dependent viscosity
  • Numerically solved eigenvalue problems with Chebyshev-τ spectral method
  • Nonexistence of a subcritical convection regime confirmed in the absence of throughflow
  • Upflow with depth-dependent viscosity enhances stability more than downflow
  • Viscosity variation promotes instability without throughflow and has dual effects with it

Cite This Study

Chithram et al. (2026) studied this question.

synapsesocial.com/papers/69a91d8dd6127c7a504c061ahttps://doi.org/10.1063/5.0318348
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  1. 1Global stability analysis of thermofluid convection in an inclined porous layer with viscous dissipation, throughflow, and local thermal non-equilibrium effects2025 · 5 citations
  2. 2Variable viscosity effects on the onset of convection in porous media1975 · 92 citations
  3. 3Nonlinear thermal convection in anisotropic porous media1979 · 168 citations