Experimental Investigation of Mixed Convection on a Rotating Circular Cylinder in a Cavity Filled With Nanofluid and Porous Media

Abdulsahib, Ahmed Dhafer; Al‐Farhany, Khaled

doi:10.30772/qjes.v13i2.653

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…They discovered that when using lower Rayleigh numbers, cylinder rotation is added effect pronounced. Numerous researches have examined the cavity-driven lid and cylinder rotation within it have been conducted, both of which have a significant effect on mixed convection [41][42][43][44]. The effect of two thermal cylinders with varying shapes (circular, square, ellipse, and the final circular and ellipse) on convection inside a square cavity with nanofluid was studied in the current study.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of How Different Forms of Heated Bodies Affect Thermal Conductivity Inside a Nanofluid Square Domain

Abdulsahib

Hammoodi²,

Omar³

et al. 2022

ARFMTS

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Two thermal cylinders with varied shapes (circular (R = 0.15), square (L = 0.15), ellipse (Rx = 0.2, Ry = 0.15), and circular (R = 0.15) near the cold wall of the square enclosure where the (AR = 0.7) is explored numerically in the present study. The nanofluid is contained within the cavity (Al2O3). Left-side vertical wall and inner bodies are maintained at a fixed temperature (Th), while the right-side vertical wall is maintained at a cool temperature (Tc). Thermal insulation is used to insulate the upper and lower horizontal walls. This code is used the (technique of finite elements), which is utilized to resolve dimensionless equations in the COMSOL program. The basic parameters that were utilized in this paper where: the Rayleigh number (Ra), which ranged from 103 to 106; the percentage of solid volume (ϕ=0.06); and the aspect ratio (AR =0.7). The outcome demonstrates that: When the heated internal bodies are used in different forms, the effect of fluid movement will be different, and when the two inner bodies are combined, the highest stream function of up to 33 can be obtained. The isotherm line shows the clear and important effect of internal bodies in enhancing and improving heat transfer. For the two-square case, the average Nu was at its lowest point. While the highest Nu was for two – the ellipse case followed by the cylinder – the ellipse and the two circular cylinders.

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Section: Introductionmentioning

confidence: 99%

An Analysis of How Different Forms of Heated Bodies Affect Thermal Conductivity Inside a Nanofluid Square Domain

Abdulsahib

Hammoodi²,

Omar³

et al. 2022

ARFMTS

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“…Moreover, some of the latest studies conducted on mixed convective heat transfer in open cavities using nanofluid as the working fluid are reported in Mahmoudi and colleagues 30,31 . Several of the most recent investigations on mixed convectives in the different porous cavities filled with nanofluids 32–38 . Investigations on the mixed convective flow of NNFs in square configurations have been intensively reported over the years, and some of these investigations include Al‐Chlaihawi and colleagues 39–45 .…”

Section: Introductionmentioning

confidence: 99%

“…30,31 Several of the most recent investigations on mixed convectives in the different porous cavities filled with nanofluids. [32][33][34][35][36][37][38] Investigations on the mixed convective flow of NNFs in square configurations have been intensively reported over the years, and some of these investigations include Al-Chlaihawi and colleagues. [39][40][41][42][43][44][45] The Galerkin finite element approach was utilized by Aboud et al 46 to investigate the mixed convective non-Newtonian flow of Cu-H 2 O nanofluid in a circular domain that incorporated magnetohydrodynamics (MHD) influence.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of mixed convection of non‐Newtonian fluid in a vented square cavity with fixed baffle

Ghurban,

Al‐Farhany,

Olayemi

2023

Heat Trans

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This paper numerically investigates mixed convective heat transfer in a vented square cavity incorporated with a baffle that is subjected to external non‐Newtonian fluids (NNFs). Adiabatic conditions are imposed on the top and bottom walls, while cold temperature conditions are applied to the right and left solid boundaries. Heated NNF enters the cavity through the inlet and goes out through the outlet at three different locations, and it passes on a vertical baffle fixed at the base placed at different lengths. To examine the impact of the inlet and outlet positions, three different shapes of the outlet port located on the right wall and the inlet port on the left bottom wall were investigated. The impacts of Reynolds number (Re) of 100 ≤ Re ≤ 1000, Richardson number (Ri) of 0.1 ≤ Ri ≤ 3, power law index (n) of 0.6 ≤ n ≤ 1.4, length of baffle (Lb) of 0.2 ≤ Lb ≤ 0.6 and the outlet hole positions (S) of on the thermal and flow distributions in the cavity are taken into consideration in this paper. The results demonstrated that the flow's intensity and heat transfer increase with improvement in the Re and n at any baffle length. When the Ri increased from 0.1 to 3, increased by 23.3% at , and 13.8% at . Also, the Ri increment results in the augmentation of the average heat transfer.

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“…Several studies have been conducted on the lid-driven cavity and cylinder rotation within it for their significant influence on mixed convection [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Study of Natural Convection Inside Inclined Nanofluid Cavity with Hot Inner Bodies (Circular and Ellipse Cylinders)

Ibrahim¹,

Hammoodi²,

Abdulsahib³

et al. 2022

IJHT

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Due to its engineering uses in recent years, natural convection within cavities has been studied to enhance heat transfer in various package shapes by infusing the base fluid with nanoparticles. In this paper, we examined natural convection in a square cavity with an inclined roof of Ag-water nanofluid and internal bodies (circular and elliptical cylinders) at the enclosure's center. The (top, bottom, and circular cylinder) walls are assumed to be adiabatic, whereas the (ellipse cylinders and left sidewall) are warmed and the right sidewall is maintained cool. The COMSOL program is based on the "Galerkin finite element approach" in terms of numerical computations. The "Rayleigh number" (Ra) (10 3 -10 6 ) is utilized, as is the solid volume fraction (0.05), the angle of inclination (-45°, -30°, 0°, 30°, 45°), "the inner circular cylinder radius considered as (R=0.15)" and "the radius of the inner ellipse cylinder as (Rx=0.2 & Ry=0.15). At a high "Rayleigh number", the stream function has the lowest value when the caustic angle is tilted to (-30°). While it comes in second place, the angle of inclination (0°) gets the highest value. While at a low "Rayleigh number", there is no effect of the angle of the stream function. There was also a convergence in Nusselt numbers at any angle at the hot left wall, at 30° and 45°, and in the hot ellipse, at 60° and 90°, so we looked at them all.

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Experimental Investigation of Mixed Convection on a Rotating Circular Cylinder in a Cavity Filled With Nanofluid and Porous Media

Cited by 12 publications

References 34 publications

An Analysis of How Different Forms of Heated Bodies Affect Thermal Conductivity Inside a Nanofluid Square Domain

An Analysis of How Different Forms of Heated Bodies Affect Thermal Conductivity Inside a Nanofluid Square Domain

Numerical investigation of mixed convection of non‐Newtonian fluid in a vented square cavity with fixed baffle

Study of Natural Convection Inside Inclined Nanofluid Cavity with Hot Inner Bodies (Circular and Ellipse Cylinders)

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