Lattice Boltzmann simulation of a Cu-water nanofluid filled cavity in order to investigate the influence of volume fraction and magnetic field specifications on flow and heat transfer

Flow and Heat Transfer Simulation of Three Different Nanofluids in a Cavity With Sinusoidal Boundary Conditions Under the Influence of an Inclined Magnetic Field Using Lbm: A Phase Deviation Approach

“…Also another interesting aspect of this figure is the increasing manner of Nu with an increase in Ha number for lower Ra numbers. This rare phenomenon is also reported by other authors (Ahrar and Djavareshkian, 2016;. This feature usually is observed when the temperature boundary condition on the west and east walls have a phase deviation of γ = π/2 and the main heat transfer regime is conduction.…”

“…So in this paper we tried to simulatethese three types of nanofluid flow in a cavity with sinusoidal temperature walls boundary conditions for a wide range of Ha (0-80) and for magnetic field angles θ = 0-90 • and phase deviation of γ = 0-90 • . Evidently, a Cu nanoparticle with K s = 400 is considered as one of the best nanoparticles for heat transfer (Ahrar and Djavareshkian, 2016), Al 2 O 3 has a moderate thermal conductivity of 40, and TiO 2 has a low thermal conductivity of about 9. So in order to increase the heat transfer rate, in the present work these three different nanoparticles are chosen to compare the enhancing effect of adding nanoparticles to the fluid versus changing the magnetic field intensity and direction, for this specific boundary condition.…”

Numerical simulation of Cu-water nanofluid magneto-hydro-dynamics and heat transfer in a cavity containing a circular cylinder of different size and positions

“…Evidently, Cu nanoparticle with 400 K s  is considered as one of the best nanoparticles for heat transfer [38,42]. So in order to increase heat transfer rate, in the present work, this nanoparticle was chosen to compare the triple effects of adding nanoparticles to the fluid, changing the magnetic field intensity and direction and the obstacle aspect ratios and positions for this nonlinear boundary condition.…”

“…It is well known that addition of nanoparticles [38,39], magnetic field intensity [38][39][40] and obstacle [41] lead to a decrease in the stream function and heat transfer rate, so in this study, we aim to define and observe the combined effect of all above-mentioned features. On the other hand, nanoparticles higher conductivity, and obstacle temperature gradient are meant to increase the heat transfer rate.…”

Magnetoconvection and entropy generation of nanofluid in an enclosure with an isothermal block: Performance evaluation criteria analysis

“…It was seen that augmenting, Rayleigh number, nanoparticles volume fraction, and aspect ratio ameliorate the heat transfer while augmenting Hartmann number reduce it. In addition, combined effects of magnetic field intensity and nanoparticles volume fraction on natural and mixed convection have been investigated by different authors: Aminossadati (2013), Sheikholeslami et al (2014c), Kobra et al (2014), Zhou and Yan (2015), Bakhshan et al (2014), Kefayati (2013aKefayati ( , 2013b, Teamah and Elmaghlany (2012), Ahrar and Djavareshkian (2016).…”