Lattice Boltzmann simulation for mixed convection of nanofluids in a square enclosure

Chen, Chieh Li; Chang, Shau-Feng; Chen, Cha'o. Kuang; Chang, Chun Kai

doi:10.1016/j.apm.2014.10.049

Cited by 53 publications

(13 citation statements)

References 34 publications

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“…The results showed that the average Nusselt number increases with the increasing of nanoparticle volume fraction and Rayleigh number, but opposite trend is observed when Hartmann number increases. Chen et al [29] used the lattice Boltzmann method to investigated the natural and mixed convection of Al2O3/water nanofluid in a square enclosure. They found that adding nanoparticles on the properties of nanofluids is enlarged in mixed convection situation.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field

Zhou

Yan

Xie

et al. 2017

International Communications in Heat and Mass Transfer

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In the present study, a three dimensional thermal lattice Boltzmann model was developed to investigate the flow dynamics and mixed convection heat transfer of Al2O3/water nanofluid in a cubic cavity in the presence of magnetic field. The model was first validated with previous numerical and experimental results. Satisfactory agreement was obtained. Then the effects of Rayleigh number, nanoparticle volume fraction, Hartmann number and Richardson number on nanofluid flow dynamics and heat transfer were examined. Numerical results indicate that adding nanoparticles to pure water leads to heat transfer enhancement for low Rayleigh numbers. However, this enhancement might be weakened and even reversed for high Rayleigh numbers. In addition, the results show the external applied magnetic field has an effect of suppressing the convective heat transfer in the cavity. Moreover, the results demonstrate that the Richardson number in mixed convection has significant influences on both streamlines and temperature field.

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Section: Introductionmentioning

confidence: 99%

Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field

Zhou

Yan

Xie

et al. 2017

International Communications in Heat and Mass Transfer

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“…Chen et al [12] implemented LBM to study free and mixed convection of Al 2 O 3 containing nanofluid. The designed geometry in their study was a square enclosure.…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann simulation of magneto-hydrodynamic double-diffusive natural convection in an enclosure with internal heat and solute source using nanofluids

2020

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Magneto-hydrodynamic double-diffusive natural convection in a cavity is numerically investigated in the present work. Al 2 O 3 , Cu, and Ag based nanofluids in a square cavity with a thermal and solute source in the center, and uniform magnetic field are considered. The Patel model is employed to estimate the thermal conductivity of applied nanofluids, and the numerical calculation is based on the implementation of the lattice Boltzmann method and utilizing the standard D 2 Q 9 model to study the heat transfer, and also species concentration. A parametric study is carried out to observe the influence of the type, the volume fraction of nanoparticle ( = 0 − 5% ), Rayleigh ( Ra = 10 4 − 10 5 − 10 6 ) , Lewis (0.1 − 2 − 10) , and Hartmann number (10 − 20 − 100) on average Nusselt and Sherwood numbers, flow fields, temperature, and concentration distribution. The results show that an augment in nanoparticle volume fraction and Rayleigh number increased the average Nusselt and Sherwood numbers. Lewis number showed a significant impact on mass transfer rate. However, it did not affect the heat transfer rate remarkably. Applying a magnetic field caused a reduction in flow circulation which resulted in a decline in heat and mass transfer. A comparison of the simulation outcome with the available data shows that the generated code perfectly captures the fluid flow behavior and heat transfer process as a function of the affecting parameters. KeywordsMHD double-diffusive natural convection • Square enclosure • Nanofluids • Lattice Boltzmann method List of symbols Ar Aspect ratio B The magnitude of the magnetic field, T c Lattice speed, m∕s c i Discrete particle speed, m∕s c s Sound velocity, m∕s C Concentration C p Specific heat, Jkg −1 K D Mass diffusivity, m 2 ∕s f , g, h Discrete distribution function F External force

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“…As an example, the applications of new nanomaterials are under intense research in the materials science [1]. Another prospective subject of studies are nanoliquids containing small amounts of nanoparticles in, e.g., water solutions [2]. Consequently, great attention of researchers over last decades is paid to the production [3,4], characterization of properties [5][6][7][8], and applications of new types of nanoparticles and structures based on them [9].…”

Section: Introductionmentioning

confidence: 99%

Brownian dynamics of the self-assembly of complex nanostructures in the field of quasi-resonant laser radiation

Kornienko

Tsipotan

Aleksandrovsky

et al. 2019

Photonics and Nanostructures - Fundamentals and Applications

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Self-assembly of nanoparticles under the action of laser field can be an universal method for the formation of nanostructures with specific properties for application in sensorics and nanophotonics. For prognosis of the self-assembly processes, the model of movement of an ensemble of nanoparticles in a viscous media under the action of laser radiation with the account for interaction of laser-induced polarizations and Brownian dynamics is developed. This model is applied to the investigation of the self-assembly process of a triple of nanoparticles into three-particle structure with a predetermined geometry.Two specific cases of formation of nanostructure from a preliminarily formed pair of particles are studied: either for the pair fixed in space or from the unfixed pair of nanoparticles. The geometry of resulting nanostructures is shown to be determined by the polarization direction of laser radiation and the laser wavelength. Under proper choice of these parameters the formation of structures is shown to be highly efficient. E. g., maximum probability of structures formation is as hig as 36-46% per single laser pulse of 10 ns duration.

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Lattice Boltzmann simulation for mixed convection of nanofluids in a square enclosure

Cited by 53 publications

References 34 publications

Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field

Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field

Lattice Boltzmann simulation of magneto-hydrodynamic double-diffusive natural convection in an enclosure with internal heat and solute source using nanofluids

Brownian dynamics of the self-assembly of complex nanostructures in the field of quasi-resonant laser radiation

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