Stability of double diffusive convection in an inclined slot
Journal
Physical Review Fluids
Journal Volume
10
Journal Issue
7
Start Page
0739021
End Page
07390216
ISSN
2469990X
Date Issued
2025-07-21
Author(s)
Abstract
We perform a linear stability analysis to investigate the double diffusive convection stability of a density-stratified fluid contained in an inclined slot subjected to a lateral temperature gradient. The inclination angle (θ) changes from −80° to 80◦ relative to the vertical. The results reveal an asymmetrical behavior in stability with respect to θ = 0◦. The base flow is less stable when heating is applied to the upper wall (negative θ) compared to heating the lower wall (positive θ). For small solute gradients, there is a critical inclination angle, θ = 65.8◦, at which the thermal gradient required to initiate instability undergoes a steep decline. At intermediate solute gradients, the thermal and solute gradients compete to dominate stability, leading to multiple transitions at which different instability modes emerge and replace one another. For large solute gradients, the critical thermal and solute gradients increase simultaneously following a relationship that approaches an asymptotic limit, which is hardly influenced by inclination angle.
Publisher
American Physical Society
Type
journal article