Darcy-Forchheimer flow behavior and thermal inferences with SWCNT/MWCNT suspensions due to shrinking rotating disk*
Sanjay Kumar Sahu, Sachin Shaw, D.N. Thatoi, Mudassar Azam, M.K. Nayak
Abstract
The goal of the present investigation is to explore the flow and thermal behavior of non-Newtonian fluid with single-walled carbon nanotube (SWCNT)/multi-walled carbon nanotube (MWCNT) suspensions over a shrunk rotating disk subject to Darcy-Forchheimer effect. The mechanisms of suction, viscous dissipation and thermal radiation have been implemented. Entropy generation analysis is carried on. Innovated Nayak-Shaw number is modeled and its profiles analysis are narrated in a lucid manner. Noble bv4c method cum shooting technique is instrumental to devise a requisite numerical solution of the developed system of the dimension-free boundary layer equations. The outcomes of the study include amplification of non-Newtonian parameter (Casson parameter) that controls the radial and azimuthal motions. Inclusion of a significant interfacial nanolayer upgrades the heat transfer rate that in turn provides better cooling for industrial needs. Addition of more nanoparticles and a medium with high porosity (Darcy-Forchheimer effect) contribute to the entropy minimization which is ubiquitous for the greater efficiency of specific thermal systems. Nayak-Shaw number due to the fluid friction irreversibility {NSff(0)} peters out and that due to porous medium irreversibility {NSpm(0)} ameliorates with the strengthening of porosity parameter effectively. It is obvious that the contribution of porous medium irreversibility dominates over due to fluid friction irreversibility.