Investigation of the entropy generation during natural convection of Newtonian and non-Newtonian fluids inside the L-shaped cavity subjected to magnetic field: application of lattice Boltzmann method

2020 ◽  
Vol 135 (2) ◽  
Author(s):  
Rui Zhang ◽  
Saeed Aghakhani ◽  
Ahmad Hajatzadeh Pordanjani ◽  
Seyed Masoud Vahedi ◽  
Amin Shahsavar ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Natural Convection ◽  
Lattice Boltzmann Method ◽  
Entropy Generation ◽  
Lattice Boltzmann ◽  
Field Application ◽  
Newtonian Fluids ◽  
Boltzmann Method ◽  
Magnetic Field Application

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.

Simulation of natural convection under high magnetic field by means of the thermal lattice Boltzmann method

2009 ◽  
Vol 18 (10) ◽  
pp. 4083-4093 ◽  
Author(s):  
Zhong Cheng-Wen ◽  
Xie Jian-Fei ◽  
Zhuo Cong-Shan ◽  
Xiong Sheng-Wei ◽  
Yin Da-Chuan
Keyword(s):  
Magnetic Field ◽  
Natural Convection ◽  
Lattice Boltzmann Method ◽  
High Magnetic Field ◽  
Lattice Boltzmann ◽  
Boltzmann Method ◽  
Thermal Lattice Boltzmann
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