부산대학교 도서관

This article studies the impact of multi-nanoparticles on the entropy generation where heat transfer in Oldroyd-B fluid is subjected to Joule heating and heat generation. C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 is assumed to obey the constitutive behavior in the context of the Oldroyd-B model. Three types of nanoparticles (C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 and C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2) are assumed to be dispersed simultaneously in C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2. The numerical scheme is used for the numerical simulations and simulations are observed and various predictions are made. The dynamics of entropy generation versus relaxation and retardation times. Momentum relaxation time is helpful in controlling entropy generation. It is also observed that C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 with C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 has minimum entropy generation relative to C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 with C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 and C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 and C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 with C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 and C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2. Relative to hybrid and mono-nanoparticles, the highest wall shear stresses are noticed in C2H6O2Al2O3,TiO2SiO2C2H6O2C2H6O2Al2O3C2H6O2Al2O3TiO2C2H6O2Al2O3,TiO2SiO2C2H6O2 with tri-nanoparticles is observed. Momentum retardation time enhances entropy generation. Therefore, it is recommended not to use fluid with Oldroyd-B behavior in mechanisms where entropy generation is not required. In mechanisms where entropy generation is not required, the base fluid or nanofluid should not be heat-generating because heat generation helps in enhancing the generation of entropy. However, heat-absorbing fluid would be favorable for the minimization of entropy.