Melting of nanoparticles-enhanced phase change material (NEPCM) in vertical semicircle enclosure: numerical study
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Convection melting of ice as a Phase change material (PCM) dispersed with Cu nanoparticles, which is encapsulated in a semicircle enclosure is studied numerically. The enthalpy-based Lattice Boltzmann method (LBM) combined with a Double distribution function (DDF) model is used to solve the convection-diffusion equation. The increase in solid concentration of nanoparticles results in the enhancement of thermal conductivity of PCM and the decrease in the latent heat of fusion. By enhancing solid concentration of nanoparticles, the viscosity of nanofluid increases and convective heat transfer dwindles. For all Rayleigh numbers investigated in this study, the insertion of nanoparticles in PCM has no effect on the average Nusselt number.
KeywordsConvection Lattice Boltzmann method Melting front Nanoparticles Phase change Semicircle
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- M. Jourabian, M. Farhadi, K. Sedighi, A. A. R. Darzi and Y. Vazifeshenas, Melting of NEPCM within a cylindrical tube: numerical study using the lattice Boltzmann method, Numer. Heat Transfer Part A, 61 (12) (2012) 929–948.Google Scholar
- A. A. R. Darzi, M. Farhadi and M. Jourabian, Lattice Boltzmann simulation of heat transfer enhancement during melting by using nanoparticles, IJST Trans. Mech. Eng., 37 (1) (2013) 23–37.Google Scholar
- J. M. Fuentes, F. Kuznik, K. Johannes and J. Virgone, Development and validation of a new LBM-MRT hybrid model with enthalpy formulation for melting with natural convection, Phys. Lett. A, 378 (4) (2014) 4374–4381.Google Scholar
- H. K. Kang, M. Tsutahara, K. D. Ro and Y. H. Lee, Numerical simulation of shock wave propagation using the finite difference lattice Boltzmann method, KSME Int. J., 16 (10) (2002) 1327–1335.Google Scholar
- S. Succi, The Lattice Boltzmann equation for fluid dynamics and beyond, clarendon, New York, USA (2001).Google Scholar
- M. Wang, J. Wang, N. Pan and S. Chen, Mesoscopic predictions of the effective thermal conductivity for micro scale random porous media, Phys. Rev. E, 75 (2007) 1–10.Google Scholar