Lattice Boltzmann method based on Dual-MRT model for three-dimensional natural convection and entropy generation in CuO–water nanofluid filled cuboid enclosure included with discrete active walls

Rahimi, Alireza; Kasaeipoor, Abbas; Amiri, Ali; Doranehgard, Mohammad Hossein; Malekshah, Emad Hasani; Kolsi, Lioua

doi:10.1016/j.camwa.2017.11.037

Cited by 50 publications

(22 citation statements)

References 43 publications

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“…According to equation ( 17), the counter-clockwise and clockwise heat flows are represented by positive and negative signs of P, respectively. The average Nusselt number over the desired walls is defined as follows (Rahimi et al, 2018f;Mahmoud et al, 2017):…”

Section: Second Law Analysismentioning

confidence: 99%

Free convection analysis in a Γ-shaped heat exchanger using lattice Boltzmann method employing second law analysis and heatline visualization

Khakrah

Mohammaei

Hooshmand

et al. 2019

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Purpose The nanofluid flow and heat transfer within a heat exchanger, with different thermal arrangements of internal active bodies, are investigated. Design/methodology/approach For the numerical simulations, the lattice Boltzmann method is utilized. The KKL model is used to predict the dynamic viscosity of CuO-water nanofluid. Furthermore, the Brownian method is taken account using this model. The influence of shapes of nanoparticles on the heat transfer performance is considered. Findings The results show that the platelet nanoparticles render higher average Nusselt number showing better heat transfer performance. In order to perform comprehensive analysis, the heatline visualization, local and total entropy generation, local and average Nusselt variation are employed. Originality/value The originality of this work is carrying out a comprehensive investigation of nanofluid flow and heat transfer during natural convection using lattice Boltzmann method and employing second law analysis and heatline visualization.

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Section: Second Law Analysismentioning

confidence: 99%

Free convection analysis in a Γ-shaped heat exchanger using lattice Boltzmann method employing second law analysis and heatline visualization

Khakrah

Mohammaei

Hooshmand

et al. 2019

HFF

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show abstract

“…According to equation ( 14), the counter-clockwise and clockwise heat flows are represented by positive and negative signs of P, respectively. The average Nusselt number over the desired walls is defined as follows (Rahimi et al, 2018m;Mahmoud et al, 2017):…”

Section: Heat Energy Trackingmentioning

confidence: 99%

Mesoscopic approach for simulating nanofluid flow and heat transfer in a finned multi-pipe heat exchanger

Liu

Bayati

Abbas

et al. 2019

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Purpose The lattice Boltzmann method is used to simulate the nanofluid flow and heat transfer inside a finned multi-pipe heat exchanger. Design/methodology/approach The heat exchanger is filled with CuO-water nanofluid. The Koo–Kleinstreuer–Li (KKL) model is used to estimate the dynamic viscosity and considering the Brownian motion in the simulation. On the other hand, the influence of nanoparticles’ shapes on the heat transfer rate is considered, and the best efficient shape is selected to be used in the investigation. Findings The Rayleigh number, nanoparticle concentration and the thermal arrangements of internal active fins and bodies are the governing parameters. In addition, the impacts of these two parameters on the nanofluid flow, heat transfer rate, local and total entropy generation and heatline visualization are analyzed, comprehensively. Originality/value The originality of this work is using of lattice Boltzmann method for simulation of nanofluid flow and heat transfer during natural convection in a heat exchanger. Furthermore, influence of the shape of nanoparticles on the thermo-physical properties of nanofluid is analyzed using Koo–Kleinstreuer–Li correlation.

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“…The average Nusselt number over the desired walls is defined as follows (Rahimi et al , 2018a; Mahmoud et al , 2017): …”

Section: Nanofluidmentioning

confidence: 99%

The coupled lattice Boltzmann simulation of free convection in a finned L-shaped cavity filled with nanofluid

Zhang

Ashraf

Liu

et al. 2019

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Purpose This paper aims to investigate the free convection, heat transfer and entropy generation numerically and experientially. A numerical/experimental investigation is carried out to investigate the free convection hydrodynamically/thermally and entropy generation. Design/methodology/approach The coupled lattice Boltzmann method is used as a numerical approach which keeps the significant advantages of standard lattice Boltzmann method with better numerical stability. On the other hand, the thermal conductivity and dynamic viscosity are measured using modern devices in the laboratory. Findings Some correlations based on the temperature at different nanofluid concentration are derived and used in the numerical simulations. In this regard, the results will be accurate with respect to using theoretical properties of nanofluid, and close agreements will be detected between present results and the previous numerical and experimental works. The numerical investigation is done under the effect of Rayleigh number (103 < Ra < 106), volume concentration of nanofluid (?? = 0.5, 1, 1.5, 2, 2.5 and 3%) and thermal configuration of the cavity (Cases A, B, C and D). Originality/value The originality of the present work lies in coupling of the lattice Boltzmann method with experimental observations to analyse the free convection in a cavity.

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Lattice Boltzmann method based on Dual-MRT model for three-dimensional natural convection and entropy generation in CuO–water nanofluid filled cuboid enclosure included with discrete active walls

Cited by 50 publications

References 43 publications

Free convection analysis in a Γ-shaped heat exchanger using lattice Boltzmann method employing second law analysis and heatline visualization

Free convection analysis in a Γ-shaped heat exchanger using lattice Boltzmann method employing second law analysis and heatline visualization

Mesoscopic approach for simulating nanofluid flow and heat transfer in a finned multi-pipe heat exchanger

The coupled lattice Boltzmann simulation of free convection in a finned L-shaped cavity filled with nanofluid

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