Heat transfer in a dissipative nanofluid passing by a convective stretching/shrinking cylinder near the stagnation point

• Published in: Zeitschrift für angewandte Mathematik und Mechanik 2024-03, Vol.104 (3), p.n/a
• Main Authors: Khan, Muhammad Riaz, Puneeth, Venkatesh, Alaoui, Mohammed Kbiri, Alroobaea, Roobaea, Abdou, Mohammed Modather Mohammed
• Format: Article
• Language: English
• Subjects: Absorptivity; Coefficient of friction; Critical point; Cylinders; Cylindrical coordinates; Differential equations; Fluid flow; Friction reduction; Graphs; Heat generation; Heat transfer; Mathematical models; Nanofluids; Nanoparticles; Ordinary differential equations; Silver; Skin friction; Stagnation point; Thermal conductivity
• ISSN: 0044-2267; 1521-4001
• DOI: 10.1002/zamm.202300733

This contemporary article examines the transfer of heat properties and the flow behavior of water‐based nanofluid suspended with silver nanoparticles. These silver nanoparticles have a very huge thermal conductivity and hence it is presumed that the resulting nanofluid shall have enhanced thermal conductance. This article is more focused on the study of Ag−H2O$Ag - {H}_2O$ nanofluid flowing past a cylinder that is modeled mathematically using the cylindrical coordinate system. The initial modeling is designed using a system of partial derivatives while at a later stage, this system is transformed into a nonlinear group of ordinary differential equations (ODEs). The equations in this system are solved to obtain the dual solutions by implementing the RKF‐45 method which has a greater rate of convergence and additionally, it is computationally very effective. The findings of the study are dealt by plotting graphs and the discussions are based on the appearance of graphs. It is further noticed that the critical point (λc)$( {{\lambda }_c} )$ remains constant at −42.58$ - 42.58$ for any changes made in the values of heat generation/absorption coefficient. Similarly, the critical value remains constant at −42.6$ - 42.6$ for any change made in the values of the Eckert number. Meanwhile, it is also observed that the increase in the Eckert number increases the temperature absorbed by the nanofluid whereas it decreases the Nusselt number. Furthermore, the higher values of the velocity slip reduce the skin friction coefficient.