Periodic and time-mean fluctuating heat transfer of Darcy nanofluid along nonlinear radiating plate with heat source/sink and oscillatory amplitude conditions

Abstract

Influence of microgravity, heat source/sink, and nonlinear thermal radiation on Darcy Forchheimer nanofluid over vertical radiating plate is the prominent objective of this study. The effects of heat source and heat sink are prominently useful in cooling of electronic devices, polymer industry, metallic plates, optical fibers and pipe industry. Non-dimensional analysis is performed for governing model and converted into steady, real and imaginary form. Reduced models are elaborated numerically using implicit finite difference method, primitive transformation and Gaussian elimination scheme. The influence of governing parameters on fluid velocity, surface temperature, steady heat-mass rate, oscillatory skin friction and oscillatory heat-mass transfer is discussed geometrically. Form numerical results, it is observed that the variation in heat source and heat sink has prominent effect on steady and oscillatory outcomes. Enhancing amplitude in fluid velocity, surface temperature and concentration profile is recorded for microgravity and thermal radiation parameter with heat source. Decreasing behavior of steady results is reported with heat sink effects. Steady skin friction and mass transfer is enhanced for thermophoresis and heat source effects. For both Brownian and thermophoresis parameters, the steady heating rate is increased with heat sink impact. Prominent oscillating layer in the amplitude of heat and mass transfer is recorded for high Prandtl and Schmidt number. Lower amplitude with smaller oscillating frequency of skin-friction, heat and mass transmission is found for small Schmidt and Prandtl value.