Significance of nanoparticle radius on EMHD Casson blood-gold nanomaterial flow with non-uniform heat source and Arrhenius kinetics

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For its biomedical applicability, the dynamics electro-magnetohydrodynamic flow of blood-gold nanomaterial over a nonlinearly stretching surface utilizing the Casson model has been numerically elucidated. The impact of second-order hydrodynamic-slip, gold nanoparticles of different inter-particle spacing and radius, and non-uniform heat source are also accounted. The incorporation of nanofluid characteristics in the traditional Casson model improves the applicability, practicality and realistic nature of the modeled flow problem. The present study finds its application in radiofrequency ablation, magnetic resonance imaging, cancer therapy, and targeted drug delivery. Apposite similarity variables are employed to transmute the modeled flow equations into a nonlinear system of first-order ODEs which are then resolved using the bvp5c scheme. It is observed that the intensification in space-dependent heat source, temperature-dependent heat source and heat of reaction ascend the thermal field. It is noted that per unit increase in the inter-particle spacing ascends the drag coefficient by 70.2431176% whereas the nanoparticle radius descends the drag coefficient by 42.2109338%. Further, the impact of heat of reaction (0.1 ≤ α≤ 0.9) , reaction rate (0.1 ≤ β≤ 0.9) , nanoparticle radius (0.5 ≤ Rnp≤ 2.5) , and inter-particle spacing (0.5 ≤ h≤ 2.5) on the mass transfer rate (ShxRex-1/2) has been scrutinized statistically using the five-level four-factor response surface optimized model. The mass transfer rate is maximum for larger values of inter-particle spacing and smaller values of reaction rate, heat of reaction and the radius of gold nanoparticles.

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Journal of Thermal Analysis and Calorimetry

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