This study explores the influence of an inclined magnetic field and variable viscosity on entropy generation in steady flow a couple stress fluid channel. The walls channel are stationary non-isothermal. is driven due to pressure gradient gravitational force. Reynold’s model for temperature-dependent was used. dimensionless, non-linear coupled equations momentum energy solved, we obtained analy...

in this paper, second law analysis for calculations of the entropy generation due to the flow andheat transfer of water-al2o3 and ethylene glycol-al2o3 nanofluids inside annuli is presented. thephysical properties of the nanofluids are calculated using empirical correlations. constant heatfluxes at inner surface of the annuli are considered and fully developed condition for fluid flowand heat t...

Entropy generation for fully developed laminar flow in a helical pipe carrying high viscous fluid under constant temperature boundary conditions is investigated analytically. This work focuses on geometrical, fluid, and thermal aspects their influence irreversibilities coils. The effect of viscosity the its operating parameters coil are studied with second law thermodynamics. most commonly used...

in this study, mixed convection heat transfer and local and global entropy generation in aventilated square cavity have been investigated numerically. the natural convection effect isachieved by a constant heat flux imposed at the bottom wall and cooled by injecting a coldfollow. in order to investigate the effect of port location, four different placementconfigurations of the inlet and outlet ...

The paper aims to analyze the effects of various Prandtl number and different nanoparticles for heat transfer entropy generation free convection laminar fluid flow in an L-shaped cavity filled by nanofluid. To investigate second law characteristics convective from L- shaped geometry water nanofluids (Cu-water, Ag-water, Al2O3-water), on average Nusselt number, total Bejan has been numerically a...

This works presents a second law analysis on heat exchanger tube configurated as circular smoot (CST), elliptical smooth (EST) and twisted (ETT) with different aspect ratios pitch lengths. The ETTs were ratio (AR) of 1.5 2.0 twist length (PL) 50, 100 200 mm. hydraulic diameter was kept constant for all cases, since the results are influenced by change in diameter. CFD analyzes run to perform co...

We consider a heat transfer augmentation problem to minimize the entropy generation by assuming boundary-layer flow of nanofluid over moving wavy surface. The demonstrates great potential in enhancing process due its high thermal conductivity. famous Tiwari and Das model has been used present article. Two types water based nanofluids containing Cu Fe3O4 nanoparticles are considered. Moreover, s...