Darcy-Forchheimer flow behavior and thermal inferences with SWCNT/MWCNT suspensions due to shrinking rotating disk

• Published in: Waves in random and complex media Vol. 35; no. 5; pp. 8323 - 8351
• Main Authors: Sahu, S. K., Shaw, S., Thatoi, D. N., Azam, M., Nayak, M. K.
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 03.09.2025
• Subjects: Casson fluid; Darcy-Forchheimer model; Nayak-Shaw number; Revised Hamilton's Crosser model; shrinking rotating disk; SWCNT/MWCNT
• ISSN: 1745-5030; 1745-5049
• DOI: 10.1080/17455030.2022.2094496

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 $ \{{N{S_{ff}}(0 )} \} $ { N S ff ( 0 ) } peters out and that due to porous medium irreversibility $ \{{N{S_{pm}}(0 )} \} $ { N S pm ( 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.