A numerical study on the Rayleigh-Benard convection in a shallow cavity filled with different metal-oxide water-based nanofluids is presented through a two-phase model, which accounts for the effects of the Brownian diffusion and thermophoresis, at variable properties with temperature. Numerical simulations are executed for different values of the average volume fraction of the nanoparticles, different aspect ratios of the enclosure, as well as for temperature difference between the bottom and the top walls. It is found that the dispersion of the nanoparticle into the base fluid increases the stability of the nanofluid layer, determining the conditions for the onset of convection also with reference to the confinement of the nanofluid.
Double-Diffusive Effects on the Onset of Rayleigh-Benard Convection of Water-Based Nanofluids / Corcione, Massimo; Quintino, Alessandro. - In: APPLIED SCIENCES. - ISSN 2076-3417. - 12:17(2022), pp. 1-13. [10.3390/app12178485]
Double-Diffusive Effects on the Onset of Rayleigh-Benard Convection of Water-Based Nanofluids
Massimo Corcione;Alessandro Quintino
2022
Abstract
A numerical study on the Rayleigh-Benard convection in a shallow cavity filled with different metal-oxide water-based nanofluids is presented through a two-phase model, which accounts for the effects of the Brownian diffusion and thermophoresis, at variable properties with temperature. Numerical simulations are executed for different values of the average volume fraction of the nanoparticles, different aspect ratios of the enclosure, as well as for temperature difference between the bottom and the top walls. It is found that the dispersion of the nanoparticle into the base fluid increases the stability of the nanofluid layer, determining the conditions for the onset of convection also with reference to the confinement of the nanofluid.File | Dimensione | Formato | |
---|---|---|---|
Corcione_Double-Diffusive_2022.pdf
accesso aperto
Tipologia:
Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza:
Creative commons
Dimensione
752.42 kB
Formato
Adobe PDF
|
752.42 kB | Adobe PDF |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.