Entropy generation of boehmite alumina nanofluid flow through a minichannel heat exchanger considering nanoparticle shape effect

2019 ◽  
Vol 521 ◽  
pp. 724-736 ◽  
Author(s):  
Abdullah A.A.A. Al-Rashed ◽  
Ramin Ranjbarzadeh ◽  
Saeed Aghakhani ◽  
Mehdi Soltanimehr ◽  
Masoud Afrand ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Entropy Generation ◽  
Shape Effect ◽  
Nanofluid Flow ◽  
Nanoparticle Shape ◽  
Minichannel Heat Exchanger ◽  
Flow Through ◽  
Alumina Nanofluid ◽  
Nanoparticle Shape Effect ◽  
Boehmite Alumina Nanofluid

Heat transfer and nanofluid flow of free convection in a quarter cylinder channel considering nanoparticle shape effect

2019 ◽  
Vol 346 ◽  
pp. 160-170 ◽  
Author(s):  
Xiaolong Shi ◽  
Pouriya Jaryani ◽  
Ali Amiri ◽  
Alireza Rahimi ◽  
Emad Hasani Malekshah
Keyword(s):  
Heat Transfer ◽  
Free Convection ◽  
Shape Effect ◽  
Nanofluid Flow ◽  
Nanoparticle Shape ◽  
Nanoparticle Shape Effect

Nanofluid flow and heat transfer due to natural convection in a semi-circle/ellipse annulus using modified lattice Boltzmann method

2019 ◽  
Vol 29 (12) ◽  
pp. 4746-4763 ◽  
Author(s):  
Qingang Xiong ◽  
Arash Khosravi ◽  
Narjes Nabipour ◽  
Mohammad Hossein Doranehgard ◽  
Aida Sabaghmoghadam ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Lattice Boltzmann Method ◽  
Entropy Generation ◽  
Lattice Boltzmann ◽  
Temperature Fields ◽  
Shape Effect ◽  
Nanofluid Flow ◽  
Content Type ◽  
Boltzmann Method

Purpose This paper aims to numerically investigate the nanofluid flow, heat transfer and entropy generation during natural convection in an annulus. Design/methodology/approach The lattice Boltzmann method is used to simulate the velocity and temperature fields. Furthermore, some special modifications are applied to make the lattice Boltzmann method capable for simulation in the curved boundary conditions. The annulus is filled with CuO-water nanofluid. The dynamic viscosity of nanofluid is estimated using KLL (Koo-Kleinstreuer-Li) model, and the nanoparticle shape effect is taken account in calculating the thermal conductivity. On the other hand, the local/volumetric entropy generation is used to show the irreversibility under influence of different parameters. Findings The effect of considered governing parameters including Rayleigh number (103<Ra < 106); nanoparticle concentration (0<<0.04) and configuration of annulus on the flow structure; temperature field; and local and total entropy generation and heat transfer rate are presented. Originality/value The originality of this work is using of lattice Boltzmann method is simulation of natural convection in a curved configuration and using of Koo–Kleinstreuer–Li correlation for simulation of nanofluid.

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