Significance of Reynolds number, lower and upper rotating disks on the dynamics of water conveying graphene and silver nanoparticles between rotating disks. (18th February 2021)

• Record Type: Journal Article
• Authors: Mahesh, A; Varma, S V K; Raju, C S K; Jayachandra Babu, M; Animasaun, I L; Shah, Nehad Ali
• Is Part Of: Physica scripta. Volume 96:Number 4(2021)
• Publication Date: 2021-02-18
• Subjects: Hybrid nanofluid -- rotating disks -- Joule heating -- Cattaneo-Christov heat flux -- entropy generation -- graphene nanoplatelets; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/abe2d3
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: Despite numerous reports on the newly discovered hybrid nanofluid, little is known on the influence of increasing Reynolds number, stretching of lower, and upper disks on the dynamics of water conveying graphene and silver between rotating disks when Lorentz force, Joule heating, suction, thermal radiation of thermal energy, and Cattaneo-Christov heat flux are highly significant. This report provides insight into such transport phenomenon with an emphasis on the increasing effects of Reynolds number, stretching of lower, and upper disks. Initially, leading equations of motion and energy are transmuted into a system of nonlinear ordinary differential equations with the aid of suitable (Von-Karman) similarity transmutations. Later, by enforcing shooting procedure (R-K 4th order based) to obtain the numerical solutions. Based on the analysis, it is worth concluding that increasing the Reynolds number improves the thermal field but reduces the tangential velocity. Entropy generation is an increasing property of stretching lower and upper disks but these are yardsticks for decreasing Bejan number.