Natural convection in fully open parallelogrammic cavity filled with Cu–water nanofluid and heated locally from its bottom wall

Hussein, Ahmed Kadhim; Mustafa, Ahmed Waheed

doi:10.1016/j.tsep.2017.03.002

Cited by 54 publications

(17 citation statements)

References 30 publications

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“…Moreover, the natural convection heat transfer in a parallelogramic cavity open from top and filled with Cu-water nanofluid are examined by Hussein and Mustafa, (2017). They noted that as the Rayleigh number rises, the average value of the Nusselt numbers will go up under diverse values of parallelogramic enclosure inclination angle and vertical locations of cylinder having the circle shape.…”

Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Characteristics of Natural Convection Flow and Heat Transfer of Parallelogramic Enclosure With an Inner Circular Cylinder Using Liquid Nanofluids

Abdulkadhim¹,

Majdi²,

Abed³

2018

Frontiers in Heat and Mass Transfer

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Fluid flow and natural convection heat transfer in a parallelogram enclosure with an inner circular cylinder using Cu-water nanofluid are studied numerically. Dimensionless Navier-Stokes and energy equations are solved numerically using finite element method based two-dimensional flow and steady-state conditions. This study evaluates the effect of different concentrations of Cu-water nanofluids (0% to 6%) with different Rayleigh numbers 10 3 ≤ Ra ≤ 10 6 under isotherm wall temperatures. The effects of geometrical parameters of the parallelogram enclosure (inclination angle in range of 0 ≤ α≤ 30 and location of inner circular cylinder-0.2 ≤ H ≤ +0.2 on the flow field and heat transfer are examined. The results are presented in terms of streamlines, isotherms, local and average Nusselt number. It is found that the inclination angle has a significant effect on flow pattern and heat transfer and the inclination angle of 30 o at a vertical location H=-0.2 gives better fluid flow strength. Moreover, the maximum heat transfer enhancement is obtained when the circular cylinder moves vertically downward up to H=-0.1 and the inclination angle is 30 o. The results also indicate that as the Rayleigh number, nanofluid concentration increase, the rate of heat transfer will increase.

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Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Characteristics of Natural Convection Flow and Heat Transfer of Parallelogramic Enclosure With an Inner Circular Cylinder Using Liquid Nanofluids

Abdulkadhim¹,

Majdi²,

Abed³

2018

Frontiers in Heat and Mass Transfer

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“…Ahmed et al [24] in their study of stretching tube in heat sink using nanofluids investigated the effects of thermal conductivity and dynamic viscosity on heat transfer and boundary-layer flow. Hussein et al [25] in their study of CuO-water nanofluids in open enclosure investigated natural-convection in magnetic field. Hussein et al [26] performed numerical study to investigate natural-convection in open cavity of parallelogrammic shape which was filled with Cu-water nanofluids having heat source at the bottom.…”

Section: Introductionmentioning

confidence: 99%

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

et al. 2020

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Original scientific paper https://doi.org/10.2298/TSCI180722022AWater cooled heat sinks are becoming popular due to increased heat generation inside the microprocessor. Timely heat removal from microprocessor is the key factor for better performance and long life. Heat transfer enhancement is reached either by increasing the surface area density and/or by altering the base fluid properties. Nanoparticles emerge as a strong candidate to increase the thermal conductivity of base fluids. In this research, the thermal performance of mini-channel heat sinks for different fin spacing (0.2 mm, 0.5 mm, 1 mm, and 1.5 mm) was investigated numerically using CuO-water nanofluids with volumetric concentration of 1.5%. The numerical values computed were than compared with the literature and a close agreement is achieved. We recorded the minimum base temperature of chip to be 36.8 °C for 0.2 mm fin spacing heat sink. A reduction of 9.1% in base temperature was noticed using CuO-water nanofluids for 0.2 mm fin spacing as compared to previously experimental estimated value using water [1]. The drop percentage difference in pressure between water and CuO-water nanofluids was 2.2-13.1% for various fin spacing heat sinks. The percentage difference in thermal resistance between water and CuO-water nanofluids was computed 12.1% at maximum flow rate. We also observed uniform temperature distribution for all heat sinks.

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“…The surface thermal radiation was found to cause an important increase of the overall entropy generation. Hussain and Mustafa [13] studied the natural convection of a nanofluid in a locally heated parallelogrammic cavity having openings in its walls.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection and Irreversibility Evaluation in a Cubic Cavity with Partial Opening in Both Top and Bottom Sides

Öztop

Almeshaal

Kolsi

et al. 2019

Entropy

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A numerical study on natural convection in a cubical cavity with partial top and bottom openings is performed in this paper. One of the vertical walls of the cavity has higher temperature than that of the opposite one; the remaining walls are insulated perfectly. Three-dimensional simulations of governing equations have been performed using a finite volume technique. The results are presented for different parameters such as opening length and Rayleigh number. It is observed that heat transfer rate and fluid flow can be controlled via opening ratio size and Rayleigh number.

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Natural convection in fully open parallelogrammic cavity filled with Cu–water nanofluid and heated locally from its bottom wall

Cited by 54 publications

References 30 publications

Characteristics of Natural Convection Flow and Heat Transfer of Parallelogramic Enclosure With an Inner Circular Cylinder Using Liquid Nanofluids

Characteristics of Natural Convection Flow and Heat Transfer of Parallelogramic Enclosure With an Inner Circular Cylinder Using Liquid Nanofluids

Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

Natural Convection and Irreversibility Evaluation in a Cubic Cavity with Partial Opening in Both Top and Bottom Sides

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