Linear and Non-Linear Stability Analysis for Thermal Convection in A Bidispersive Porous Medium with Thermal Non-Equilibrium Effects

Linear and non-linear stability analysis

Authors

  • Israa Mkheilef Mankhi Department of Mathematics, College of Sciences, University of Basrah, Basrah, Iraq
  • Shatha Ahmed Haddad Department of Mathematics, College of Sciences, University of Basrah, Basrah, Iraq

DOI:

https://doi.org/10.24996/ijs.2022.63.2.27

Keywords:

Bidispersive porous medium, Local thermal non-equilibrium, Linear instability, Nonlinear stability, Darcy model

Abstract

     The linear instability and nonlinear stability analyses are performed for the model of bidispersive local thermal non-equilibrium flow. The effect of local thermal non-equilibrium on the onset of convection in a bidispersive porous medium of Darcy type is investigated.  The temperatures in the macropores and micropores are allowed to be different. The effects of various interaction parameters on the stability of the system are discussed. In particular, the effects of the porosity modified conductivity ratio parameters,  and , with the inter-phase momentum transfer parameters and, on the onset of thermal Convection are also considered. Furthermore, the nonlinear stability boundary is found to be below the linear instability threshold. The numerical results are presented for free-free boundary conditions.

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Published

2022-02-27

Issue

Section

Mathematics

How to Cite

Linear and Non-Linear Stability Analysis for Thermal Convection in A Bidispersive Porous Medium with Thermal Non-Equilibrium Effects: Linear and non-linear stability analysis. (2022). Iraqi Journal of Science, 63(2), 702-722. https://doi.org/10.24996/ijs.2022.63.2.27

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