Mixed convection heat transfer of turbulent flow in a three-dimensional lid-driven cavity with a rotating cylinder

Kareem, Ali Khaleel; Gao, Shian

doi:10.1016/j.ijheatmasstransfer.2017.04.118

Cited by 62 publications

(22 citation statements)

References 39 publications

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“…where C 1ε , C 2ε and C 3ε are model constants and Sk and Sε refer to the user-defined source terms. The remaining terms are written in equations (6)(7)(8).…”

Section: Nomenclaturementioning

confidence: 99%

“…The mixed convective flow of moving wall cavity is produced as a result of both natural and forced convection. Since heat convection can be represented in many cavity configurations it has many industrial and engineering applications such as electronic cooling, lubrication technologies, oil extraction, solar collectors, food processing [1][2][3][4][5][6][7][8], many researchers have investigated various free or mixed convection problems. Involving some additional passive objects within the enclosure to enhance the heat transfer ratio has become popular over the years.…”

Section: Introductionmentioning

confidence: 99%

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A comparison study of mixed convection heat transfer of turbulent nanofluid flow in a three-dimensional lid-driven enclosure with a clockwise versus an anticlockwise rotating cylinder

Kareem

Gao

2018

International Communications in Heat and Mass Transfer

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A turbulent 3D mixed convective flow of pure water, H2O, and nanofluid, SiO2-H2O, inside a differentially heated moving wall enclosure containing an insulated rotating cylinder over a range of rotational speeds,-5 ≤ Ω ≤ 5, Reynolds numbers, 5000 and 10000, and constant Grashof number, is numerically investigated. A cooled lid-driven top wall and a heated bottom wall are the only thermally uninsulated walls in this domain. A standard k-ε for the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach is applied to the turbulence calculation. Nusselt number, mean velocity profile, streamline, isothermal and isosurface temperatures are derived and presented in this paper to gain a better understanding of the effects of clockwise and anticlockwise rotating cylinder directions on the heat transfer and flow patterns. Interesting changes in flow structure and heat transfer have been analysed for all rotational speeds and fluid types at both Reynolds number values. Nonlinear increases in Nusselt number have been observed by using nanofluid instead of pure water. The wall shear stress and turbulent kinetic energy profiles are found to be influenced by changing the Reynolds number and rotational speed and direction. Furthermore, incremental heat transfer rates at the walls can be achieved by increasing the cylinder rotation speeds, but these increases have weaker influences on the top wall than on the bottom wall.

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“…where C 1ε , C 2ε and C 3ε are model constants and Sk and Sε refer to the user-defined source terms. The remaining terms are written in equations (6)(7)(8).…”

Section: Nomenclaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparison study of mixed convection heat transfer of turbulent nanofluid flow in a three-dimensional lid-driven enclosure with a clockwise versus an anticlockwise rotating cylinder

Kareem

Gao

2018

International Communications in Heat and Mass Transfer

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“…It has been demonstrated an improvement in the characteristics heat transfer with increasing the baffle height. Kareem and Gao [15] investigated numerically the combined forced and natural convection heat transfer in differentially heated three dimension obstructed cavity with a thermally insulated rotating circular cylinder Reynolds numbers were varied from (5000-30000). Norhaliza et al, [16] presented a numeric analysis with the existence of magnetic field for heat transfer in rectangular enclosure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Mixed Convection in a Cavity with a Rotating Cylinder

Salman¹,

Aiss²,

Almudhaffar³

2020

ARFMTS

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Mixed convection in a semicircle enclosure of radius 0.15 m and length 0.75 m is studied experimentally. An insulated rotation cylinder is fixed at the center of the cavity to improve the heat transfer coefficient, the bottom wall of the enclosure is subjected to constant heat flux while the external curved wall is exposed to the ambient temperature. Cavity is placed horizontally and vertically and the angular velocities (62.8,83.73,125.6) rad/s. Results show an improvement of heat transfer coefficient with increasing angular velocity and with the horizontal and vertical cavity positioning.

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“…In addition, they found that the highest heat transfer rate occurs for the case with the highest Pr and the smallest aspect ratio. Mixed convection of heat transfer in a lid-driven trapezoidal cavity was studied to find the influence of a combination of different nano-particles and water on the heat transfer rate by Kareem and Gao [27]. Four types of nanofluid were studied for different rotational angle and Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mixed Convection in a Cylindrical Lid Driven Cavity Filled with Water-Cu Nanofluid

et al. 2019

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The present numerical research studies the effect of nano-materials in a lid-driven cylindrical cavity with rotation of circumferential top wall. The heat is transferred from two lateral walls to the domain by constant temperature conditions while other walls are kept isolated. The non-dimensional equations are solved by Finite Volume Method (FVM) and SIMPLEC method. The effect of Reynolds (Re = 100, 400, 1000), Ryleigh (Ra = 104, 105, 106) numbers are studied. In addition, the effect of concentration of nano materials (ϕ = 0%, 1%, 5%), the Height Ratio (HR = 1, 0.5, 2) on Nusselt number, isotherm lines and streamlines are studied. The results show that Reynolds number also can change the effect of nano particles on the heat transfer rate. It is observed that the height ratio increase can improve the Nusselt number since the number and the size of vortices inside the cavity changes. In addition, increase of Ra number can change the flow structure inside the cavity which can help in increasing of Nusselt number.

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Mixed convection heat transfer of turbulent flow in a three-dimensional lid-driven cavity with a rotating cylinder

Cited by 62 publications

References 39 publications

A comparison study of mixed convection heat transfer of turbulent nanofluid flow in a three-dimensional lid-driven enclosure with a clockwise versus an anticlockwise rotating cylinder

A comparison study of mixed convection heat transfer of turbulent nanofluid flow in a three-dimensional lid-driven enclosure with a clockwise versus an anticlockwise rotating cylinder

Experimental Study of Mixed Convection in a Cavity with a Rotating Cylinder

Investigation of Mixed Convection in a Cylindrical Lid Driven Cavity Filled with Water-Cu Nanofluid

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