Adaptive Permeability-Controlled Nanofluid Systems over Porous Stretching Surfaces forEnhanced Boundary Layer Stability and Thermal Efficiency
DOI:
https://doi.org/10.71426/jasm.v2.i1.pp75-82Keywords:
Nanofluid flow, Adaptive permeability control, Porous media, Boundary layer stability, Thermal efficiency, Inverse Darcy number, Stretching surface, Visco-elastic fluid, Heat transfer enhancementAbstract
Thermal regulation in systems involving stretching surfaces is critically governed by boundary layer stability and heat transfer efficiency, particularly in the presence of porous substrates. Conventional nanofluid-based approaches enhance thermal conductivity but lack adaptive mechanisms for controlling flow resistance and boundary layer dynamics. This study presents an adaptive permeability-controlled nanofluid framework for regulating viscoelastic flow and thermal transport over porous stretching surfaces. The governing nonlinear partial differential equations describing mass, momentum, and energy transport are transformed into a system of ordinary differential equations using similarity transformations, enabling efficient numerical analysis. The inverse Darcy number is incorporated as a control parameter to dynamically regulate permeability-induced resistance, while mass transpiration is used to further stabilize near-wall flow behavior. Parametric analysis reveals that increasing permeability resistance significantly suppresses velocity profiles, leading to a reduction of up to 40\% in momentum boundary layer thickness. Concurrently, enhanced thermal decay improves heat transfer rates by approximately 30-35%, as indicated by the increase in the Nusselt number. The combined effect of permeability control and transpiration produces a stable and thinner boundary layer with improved thermal performance. The proposed framework establishes a direct linkage between physical modeling and adaptive control, offering a scalable solution for advanced thermal management applications such as polymer processing, heat exchangers, and microfluidic cooling systems.
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