Computational analysis of strontium stannate nanoparticles flow and non-Fourier-Fick's heat flux over an expanding cylinder: A nanoparticles aggregation study

An application of strontium stannate (SrSnO₂) nanoparticles on cylindrical surfaces may be accomplished using a variety of processes, including spray coating, dip coating, spin coating, electrophoretic deposition, and sol–gel procedures. These coatings find use in a variety of applications, including photocatalysis, energy devices, optical coatings, corrosion resistance, and sensors, among others. Although aggregation may improve certain applications, uncontrolled aggregation often degrades nanoparticle functioning (e.g., decreased surface area or modified optical characteristics). Resolving this requires stabilizers, surface coatings, or regulated settings to guarantee consistent outcomes. This work elucidates the role of strontium stannate nanoparticle aggregation on radiative flow over an expanding cylinder. This study delineates the complex interactions among several critical factors like exponential heat transfer and darcy Forchheimer medium accounting for supplementary factor Cattaneo-Christov formulation. In order to formulate the mathematical issue, we must adhere to the conservation of momentum and energy. A suitable similarity transformation is applied to convert the resulting partial differential equations into ODEs. Solutions are derived numerically by employing Maple built-in RKF-45 function and illustrated graphically for curved surface. An examination and discussion of the behaviour of several key parameters are being carried out using graphical representations. It is found that, the fluid velocity is much superior in the Aggregation case compared to the non-Aggregation scenario. Furthermore, Strontium stannate nanoparticles have high thermal conductivity, due to these higher values of Prandtl number reduces the temperature profile.