The impact of monocity and hybridity of nanostructures on the thermal performance of Maxwellian thin-film flow with memory and Darcy–Forchheirmer effects

• Published in: Journal of thermal analysis and calorimetry 2021, Vol.143 (2), p.1261-1272
• Main Author: Sadiq, Muhammad A.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Drag; Heat generation; Inorganic Chemistry; Maxwell fluids; Measurement Science and Instrumentation; Momentum; Nanofluids; Nanoparticles; Nanostructure; Physical Chemistry; Polymer Sciences; Porous media; Relaxation time; Thermal boundary layer; Thermal conductivity; Thermal relaxation; Thermodynamic efficiency; Thickness; Thin films; Transportation models; Viscoelasticity; Working fluids
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-020-09761-1

This article considers viscoelastic effects on the enhancement of transportation of heat in thin-film flow when the relaxation time phenomenon is considered to be significant. Transport models characterizing momentum and thermal memory effects are solved numerically. Finite element simulations are carried out for the prediction about viscoelasticity, relaxation time memory effects and drag by nonlinear porous medium and suspension of hybrid nanostructures in the Maxwellian fluid. The predictions are recorded in the form of graphical and numerical data which are interpreted to extract significant outcomes. A notable contrast in the behavior of thermal relaxation time and suspension of nanostructures is observed. This consequence is a blessing that thermal and momentum boundary layer thicknesses may be rheostated via relaxation times. On the other hand, a substantial rise in the thermal conductivity of Maxwellian working fluid in a thin-film region is observed due to the suspension of hybrid nanoparticles. Further, it is observed that improvement in thermal efficiency of the Maxwellian thin-film flow via hybrid nanoparticles is higher than the improvement in thermal efficiency of the Maxwellian thin-film flow via mono nanoparticles. The existence of a porous medium in the thin-film flow region offers a notable drag to flow. Subsequently, the porous medium is noted as a momentum controlling factor in the thin-film flow of Maxwell fluid. The heat generation process in hybrid nanofluid is faster that the heat generation in mono nanofluid.