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Mixed convection and entropy generation of a hybrid nanofluid flow in a tilted channel containing heated blocks
A three‐dimensional numerical laminar mixed convection analysis has been examined to investigate thermal transfer, fluid flow, and second law behaviors in an inclined channel with four heated blocks within, submitted under a constant heat flux using Al2O3–Cu water‐based hybrid nanofluid as a circulating fluid. Our main purpose is to perform a close‐to‐reality approach, which leads to results that can be applied in many experimental and industrial fields. This study focuses on the analysis of the effect of Reynolds number (100 ≤ Re ≤ 500), Richardson number (0.1 ≤ Ri ≤ 2), nanoparticles concentration (0 ≤ ≤ 0.05), blocks positions, and inclination of the channel (0° ≤ θ ≤ 90°) to examine the variation of Nusselt number Nu, temperature gradient entropy Sh, fluid friction entropy Sf, and the number of Bejan Be. Results show that the enhancements provided to the Nu number by elevating previous parameters reached a percentage rate of 3.2% when increasing , 12.9% with Ri, and 8.58% with Re; however, the aligned position reveals higher values. There is also an increment in Be number when Ri and Re increase, but in this case, the not‐aligned position reveals the highest values. To predict Nu number values, correlations were developed to examine the effects of , Ri, and Re on Nu, for both aligned and not‐aligned positions.
Mixed convection and entropy generation of a hybrid nanofluid flow in a tilted channel containing heated blocks
A three‐dimensional numerical laminar mixed convection analysis has been examined to investigate thermal transfer, fluid flow, and second law behaviors in an inclined channel with four heated blocks within, submitted under a constant heat flux using Al2O3–Cu water‐based hybrid nanofluid as a circulating fluid. Our main purpose is to perform a close‐to‐reality approach, which leads to results that can be applied in many experimental and industrial fields. This study focuses on the analysis of the effect of Reynolds number (100 ≤ Re ≤ 500), Richardson number (0.1 ≤ Ri ≤ 2), nanoparticles concentration (0 ≤ ≤ 0.05), blocks positions, and inclination of the channel (0° ≤ θ ≤ 90°) to examine the variation of Nusselt number Nu, temperature gradient entropy Sh, fluid friction entropy Sf, and the number of Bejan Be. Results show that the enhancements provided to the Nu number by elevating previous parameters reached a percentage rate of 3.2% when increasing , 12.9% with Ri, and 8.58% with Re; however, the aligned position reveals higher values. There is also an increment in Be number when Ri and Re increase, but in this case, the not‐aligned position reveals the highest values. To predict Nu number values, correlations were developed to examine the effects of , Ri, and Re on Nu, for both aligned and not‐aligned positions.
Mixed convection and entropy generation of a hybrid nanofluid flow in a tilted channel containing heated blocks
Ghennai, Ahlam (Autor:in) / Bessaïh, Rachid (Autor:in) / Merabet, Abderrezak (Autor:in)
Heat Transfer ; 51 ; 6977-6999
01.11.2022
23 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Free convection of hybrid Al2O3-Cu water nanofluid in a differentially heated porous cavity
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