Unsteady periodic natural convection in a triangular enclosure heated sinusoidally from the bottom using CNT-water nanofluid

Experimental investigation of the thermal-hydraulic performance of conically coiled tubes using Al2O3/water nanofluid

“…These nanotechnology-based fluids, termed as nanofluids, have outstanding properties such as high thermal conductivity. Today, nanofluids are used to improve thermal performance in a wide variety of applications [1][2][3][4][5][6]. Recent research has proven that the use of nanofluids and coiled tubes concurrently may considerably increase the HTR [7][8][9].…”

Conjugate MHD natural convection of hybrid nanofluids in a square enclosure containing a complex conductive cylinder

“…Also, as the nanoparticles are small enough to flow through the microchannels, they can be widely used in compact heat exchangers. Numerical simulations of natural convection of nanofluid have been conducted numerously (Wang and Mujumdar, 2007; Bahiraei and Hangi, 2015; Godson et al , 2010; Ho et al , 2010; Sheremet et al , 2018; Rahman et al , 2022; Islam et al , 2022). The suspended nanoparticles can be chosen widely according to the specified demands because of their diverse variety such as Al 2 O 3 , Cu, CuO, TiO 2 and Ag.…”

“…From square enclosure to other different shaped cavities, researchers have extensively expanded the investigation of MHD natural convection. Nasri et al (2020), Son and Park (2017), Oki and Tanahashi (1995); and Islam et al (2022) studied the natural convection inside a square/rectangular enclosure in the presence of a magnetic field. Beyond the simple geometries, Giwa et al (2020) recently reviewed the research articles about MHD convection behaviors of nanofluids inside the non-square enclosures, and reported that such cases have attracted more attention of researchers than the square cavity in the past decade.…”

“…Beyond the simple geometries, Giwa et al (2020) recently reviewed the research articles about MHD convection behaviors of nanofluids inside the non-square enclosures, and reported that such cases have attracted more attention of researchers than the square cavity in the past decade. Diverse numerical methods such as finite element method (Ahmed and Rashed, 2019; Job et al , 2017), finite element-based Galerkin weighted residual method (Islam et al , 2022; Hossain et al , 2022b; Hossain et al , 2022a; Keya et al , 2022), control volume finite element method (Sheikholeslami and Rokni, 2017), dual reciprocity boundary method (Oglakkaya and Bozkaya, 2016) and Lattice Boltzmann method (Mliki et al , 2017; Ashorynejad and Shahriari, 2018) were applied to discretize the complex geometry of the cavity. Usually, the nanofluid is the liquid-based rather than gas-based because the metallic nanoparticles suspended in the gas will rapidly settle to the bottom.…”

“…If the base-fluid is water, the Prandtl number is usually set as 6.2. Among various parameters, researchers mainly concern the effect of Rayleigh number, Hartmann number, the volume fraction of nanoparticles, the inclination angle of slanted enclosure on the heat transfer enhancement or suppression under different boundary conditions such as non-uniformly heated wall (Hossain and Alim, 2014; Sathiyamoorthy and Chamkha, 2010; Islam et al , 2022) and constant heat flux (Sheikholeslami et al , 2017). Besides, Yu et al (2013) investigated the effect of different directions of uniform magnetic field on fluid flow and heat transfer using the compact finite difference algorithm.…”