Effects of an adiabatic fin on the mixed convection heat transfer in a square cavity with two ventilation ports

Selimefendigil, Fatih; Oztop, F Hakan

doi:10.2298/tsci120608047s

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Selimefendigil and Oztop [7] analyzed numerically the effect of the adiabatic thin fin on the mixed convection performance in 2-D square cavity with two ventilation ports. El-Maghlany et al [8] examined the natural convection heat transfer behavior and entropy generation inside an infinite square cavity.…”

Section: Introductionmentioning

confidence: 99%

Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

et al. 2018

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“…Some attempts can be mentioned as a) using magnetic field or electrical field b) using an obstruction within the cavity [1e11] c) using surface corrugation and its geometrical parameters [12,13]. The methods can be combined to have a large number of control parameters [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The effects of the radius, rotation velocity and thermal conductivity and thermal capacity of the cylinder on the mixed convection was studied. Recently, Selimefendigil and Oztop [15] studied the convection in a vented cavity with a rotating cylinder. They observed that the length and size of the recirculation zones can be controlled with magnetic dipole strength and angular rotational speed of the cylinder.…”

Section: Introductionmentioning

confidence: 99%

Mixed convection of ferrofluids in a lid driven cavity with two rotating cylinders

Selimefendigil

Öztop

2015

Engineering Science and Technology, an International Journal

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a b s t r a c tMixed convection of ferrofluid filled lid driven cavity in the presence of two rotating cylinders were numerically investigated by using the finite element method. The cavity is heated from below, cooled from driven wall and rotating cylinder surfaces and side vertical walls of the cavity are assumed to be adiabatic. A magnetic dipole source is placed below the bottom wall of the cavity. The study is performed for various values of Reynolds numbers (100 Re 1000), angular rotational speed of the cylinders (À400 U 400), magnetic dipole strengths (0 g 500), angular velocity ratios of the cylinders ð0:25 U i =U j 4Þ and diameter ratios of the cylinders ð0:5 D i =D j 2Þ. It is observed that flow patterns and thermal transport within the cavity are affected by variation in Reynolds number and magnetic dipole strength. The results of this investigation revealed that cylinder angular velocities, ratio of the angular velocities and diameter ratios have profound effect on heat transfer enhancement within the cavity. Averaged heat transfer enhancements of 181.5 % is achieved for clockwise rotation of the cylinder at U ¼ À400 compared to motionless cylinder case. Increasing the angular velocity ratio from U 2 =U 1 ¼ 0:25 to U 2 =U 1 ¼ 4 brings about 91.7 % of heat transfer enhancement.

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Mixed convective heat transfer in an open cavity with fins

Abu‐Ghurban,

Al‐Farhany

2024

Heat Trans

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This work numerically explores the mixed convective heat transfer in an open square enclosure containing conducting fins fixed to the heated vertical wall. This kind of work with fins has enormous potential due to its applications in research, engineering, and current industries. Therefore, the current work is highly significant to understand the impact of mixed convection. The external flow enters from the hole in the bottom wall and leaves from the hole in the upper wall. The left vertical wall of the enclosure is heated isothermally, and the fins are attached to the heated walls at a uniform height. Both the upper and lower walls are adiabatic, whereas the right sidewall is at a lower temperature. The non‐dimensional transport equations are resolved by using the finite element method. The study is accomplished for the wide control variables range, such as Reynolds number (50 ≤ Re ≤ 200), Richardson's number (0.1 ≤ Ri ≤ 10), the length of the fins (Lf = 0.2, 0.4, and 0.6), the size of the outlet opening (Wout = 0.1, 0.2, and 0.3), and the gaps in between the outlet hole and left heated wall (S = 0, 0.45, and 0.9). The results show that the thermal performance of the open enclosure is meaningfully affected by the control parameters. The maximum and minimum heat transfer happens when the position of the outlet opening is at the left (S = 0) and right (S = 0.9), respectively. The heat transfer improves by raising the Ri and Re, whereas increasing the fin's length and distance between the outlet opening and left wall reduces heat transfer significantly. The rises 13% with a decrease in the fin's length from 0.6 to 0.2 at Re = 200, S = 0 due to the improvement of the convection on the heated wall. Also, increases by 15% when Ri increases from 1 to 9.

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Effects of an adiabatic fin on the mixed convection heat transfer in a square cavity with two ventilation ports

Cited by 6 publications

References 15 publications

Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

Mixed convection of ferrofluids in a lid driven cavity with two rotating cylinders

Mixed convective heat transfer in an open cavity with fins

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