Buoyant Convective Flow and Heat Dissipation of Cu–H₂O Nanoliquids in an Annulus Through a Thin Baffle

Abstract

This article numerically investigates the buoyant convective flow and thermal transport enhancement of Cu–H2O nanoliquid in a differentially heated upright annulus having a thin baffle. For the analysis, the outer and inner cylinders are cooled and heated respectively through insulated top and lower boundaries. Also, the baffle temperature is assumed to be that of the hot cylinder. The finite difference based numerical technique is used to solve the system of equations governing the physical processes. The findings are accessible in terms isotherms, streamlines and Nu number for wider ranges of baffle positions and lengths, Rayleigh numbers, and by considering different nanofluid (NF) volume fractions. The average Nu number is enhanced in addition of the Cu nanoparticle to the base liquid and it is also found the liquid flow and heat transport can be successfully controlled via the appropriate selection of baffle location and length. Principally, the baffle length having 20% of annular width placed at 80% of the annular height has been found to produce higher thermal transport rates as compared to other choices of baffle lengths and positions.

Broadband absorbing mono, blended and hybrid nanofluids for direct absorption solar collector: a comprehensive review

“…Over the years, numerous researchers have investigated the optical absorption and photothermal conversion properties of these nanofluids. Studies on metallic [63,64], metal oxide [65,66], carbides, nitrides, graphene, A c c e p t e d M a n u s c r i p t graphite, and carbon nanotube nanoparticle-based monocomponent nanofluids have been identified and discussed. Significant findings from studies on optical property characterization of nanofluids have been summarized in Table 1.…”

MHD Flow of a Hybrid Nano-Fluid in a Triangular Enclosure with Zigzags and an Elliptic Obstacle

“…Other authors [44,45] studied convective flow inside enclosures with different hot-shaped inner cylinders. Several other references were utilized to establish this work [46][47][48][49][50][51].…”

Coupling of BGK lattice Boltzmann method and experimental rheological/thermal behavior of Al2O3–oil nanolubricant for modeling of a finned thermal storage

“…Furthermore, it was showed that the curved corners have a significant influence on the flow structure and energy consumption. On the other hand, the considerable impacts of nanofluid on the natural convection (Pushpa et al , 2021), entropy generation (Mebarek-Oudina et al , 2021), heat transfer rate (Marzougui et al , 2021; Shafiq et al , 2021) have been proven by the researchers. Swain et al (2021) investigated the influence of chemical reaction and variable magnetic field of MWCNT/Fe 3 O 4 –water nanofluid in a shrinking porous sheet.…”

“…Furthermore, it was showed that the curved corners have a significant influence on the flow structure and energy consumption. On the other hand, the considerable impacts of nanofluid on the natural convection (Pushpa et al, 2021), entropy generation (Mebarek-Oudina et al, 2021), heat transfer rate (Marzougui et al, 2021;Shafiq et al, 2021) The natural convection problem in a thermal storage is analyzed using numerical and experimental approaches. The Bhatnagar-Gross-Krook (BGK) lattice Boltzmann method is used for the numerical simulations, and experimental measurements are conducted for thermos-physical properties of Al 2 O 3 -oil nanolubricant.…”