Free convection heat transfer and fluid flow of Cu–water nanofluids inside a triangular–cylindrical annulus

Particle shape and radiation effects on Marangoni boundary layer flow and heat transfer of copper-water nanofluid driven by an exponential temperature

“…It is also assumed that the base fluid water and the nanoparticle copper are in thermal equilibrium and that no slippage occurs between them. The thermophysical properties of the base fluid and nanoparticle are given in Table 1 [44][45][46][47][48]. Further, we consider a Cartesian coordinate system (X, Y), where X and Y are coordinates measured along the plate and normal to it, respectively.…”

“…In most studies on copper-water nanofluid [44][45][46][47][48], the solid volume fraction is restricted to 0.05 % ≤ ϕ ≤ 6.00%. So, this paper mainly considers the cases as follows: ϕ = 0.0% (i.e.…”

Prediction of Natural Convection Heat Transfer Phenomena of Nanofluids in Corrugated Annulus

“…The results show that the eccentricity is a good control parameter for both pure and nanofluid filled annulus. Sourtiji et al 2015, [28] concluded that the percentage of heat transfer enhancement caused by Cu-water nanofluid around a heated inner circular cylinder inside a horizontal enclosure is more remarkable at lower Rayleigh numbers. [29] showed that the enhanced thermal properties of Al2O3; Cu and TiO2 nanofluids around a heated circular and elliptical cylinder enclosed by an inclined cooled cubic enclosure give highest heat transfer enhancement in the conduction dominated flow regime.…”

“…[29] showed that the enhanced thermal properties of Al2O3; Cu and TiO2 nanofluids around a heated circular and elliptical cylinder enclosed by an inclined cooled cubic enclosure give highest heat transfer enhancement in the conduction dominated flow regime. Sourtiji et al 2015, [30] noticed that the heat transfer rate inside a horizontal triangular cylindrical annulus filled with of Cu-water nanofluids increases as radius ratio increases at higher values of Rayleigh number and vice versa at lower Rayleigh numbers. Hatami et al 2016, [31] concluded that the shape of the wavy wall of enclosure filled with nanofluids has a significant effect on the heat transfer process.…”

Numerical analysis of conjugate natural and mixed convection heat transfer of nanofluids in a square cavity using the two-phase method

“…In the homogenous method, 100 it is assumed that the solid particles and the base fluid are in ther-101 mal equilibrium and have the same temperature and velocity. 102 There are many numerical studies in this field which have been 103 used homogeneous approach for simulation of the nanofluids 104 [14][15][16][17][18][19]. Purusothaman et al [20], Cho et al [21], Sheremet et al 105 [22], Alsabery et al [23] and Mahmoodi [24] presented a numerical 106 study of natural and mixed convection heat transfer of nanofluid 107 flow in different geometries.…”