Turbulent and steady boundary layers and radiative heat transfer over magnetic coated elastic-polymer surface in drug-eluting polymeric stents: Powell-Eyring turbulence model

The stretching, magnetic coating and thermal radiating heat impact on conducting elastic-polymer surface has noticeable applications in drug-eluting polymer stents, biodegradable stents, tracheal stents, absorbable stents, vascular stents, coronary stents, and fabrication process of stents for enhanced heat and mass transport. Utilizing Powell-Eyring nanofluid, the amplitude, oscillation and phase change behavior in heating distribution and mass characteristics over elastic-polymer surface are deduced numerically. The polymer surface model is solved using dimensionless units, primitive-formulation, oscillatory stokes transformation, Gaussian-elimination technique and implicit finite difference method. The computational and tabular outcomes are deduced by using FORTAN tool and data is presented through Tecplot-360 with significant asymptotic values of unknown quantities. The steady values are examined first and then utilized in main domain to find the amplitude and oscillation in momentum-thermal transport of non-Newtonian fluid. The influence of thermal buoyancy force, radiation, magnetic field, thermophoresis and Brownian motion on the physical quantities such as velocity, streamlines, temperature, isotherms and concentration is deduced. It is noticed that the high amplitude in fluid velocity factor is depicted for high values of magnetic field, radiation and Powell-Eyring fluid parameter. Using Brownian motion and thermal buoyancy, the steady heating variation and steady nanoparticle concentration flow is better with noticeable difference. The fluctuation, oscillating frequency and phase angle of heating distribution and concentration/mass rate is increased as Schmidt factor and Prandtl coefficient increases. The concept of Powell-Eyring nanoparticles with improved theoretical and innovative mechanism is very useful in artificial heart surgery, heating-cooling of medical devices, stents coating, biodegradable magnesium stents, polymer cardio stents and other bio-medical equipment.