Mixed convection and entropy generation in a nanofluid filled cubical open cavity with a central isothermal block

Al‐Rashed, Abdullah A.A.A.; Kalidasan, K.; Kolsi, Lioua; Velkennedy, R.; Aydi, Abdelkarim; Hussein, Ahmed Kadhim; Malekshah, Emad Hasani

doi:10.1016/j.ijmecsci.2017.11.033

Cited by 117 publications

(39 citation statements)

References 43 publications

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“…This special attention is due to its significant applications in many industrial sectors. Examples of these sectors include solar receivers, crystal growth, float glass production, packaging of semiconductors, petroleum reservoirs, landing gear wells, geothermal energy systems, and an electronic chips . In this manner, the heat transfer and the flow field characteristics were investigated for the mixed convection problem in a cavity‐channel combination was investigated by many authors.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer inside a horizontal channel with an open trapezoidal enclosure subjected to a heat source of different lengths

Laouira

Mebarek‐Oudina

Hussein

et al. 2019

Heat Trans. Asian Res.

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The heat transfer phenomena inside a horizontal channel with an open trapezoidal enclosure subjected to a heat source of different lengths was investigated numerically in the present work. The heat source is considered as a local heating element of varying length, which is embedded at the bottom wall of the enclosure and maintained at a constant temperature.The air flow enters the channel horizontally at a constant cold temperature and a fixed velocity. The other walls of the enclosure and the channel are kept thermally insulated. The flow is assumed laminar, incompressible, and two-dimensional, whereas the fluid is considered Newtonian. The results are presented in the form of the contours of velocity, isotherms, and Nusselt numbers profiles for various values of the dimensionless heat source lengths (0.16 ≤ ε ≤ 1). while, both Prandtl and Reynolds numbers are kept constant at (Pr = 0.71) and (Re = 100), respectively. The results indicated that the distribution of the isotherms depends significantly on the length of the heat source. Also, it was noted that both the local and the average Nusselt numbers increase as the local heat source length increases. Moreover, the maximum temperature is located near the heat source location.

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Section: Introductionmentioning

confidence: 99%

Heat transfer inside a horizontal channel with an open trapezoidal enclosure subjected to a heat source of different lengths

Laouira

Mebarek‐Oudina

Hussein

et al. 2019

Heat Trans. Asian Res.

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“…It was found that the average Nusselt number together with the heat transfer rate from hot and cold sources were increased with increasing Rayleigh number. Additional useful researches related with the subject can be found in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Computational study of natural convection and entropy generation in 3-D cavity with active lateral walls

et al. 2020

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Numerical simulation of the natural convection and entropy generation in an airfilled cubical cavity with active lateral walls is performed in this work. Both the lateral front and right sidewalls are maintained at an isothermal cold temperature. While an isothermal hot temperature is applied for both the lateral back and left sidewalls. The upper and lower walls are kept adiabatic. Entropy generation rates due to the fluid friction and the heat transfer are simulated by using the Second law of thermodynamics. Results are illustrated for Rayleigh numbers varied from (10 3 ≤ Ra ≤ 10 6). It was shown that the increase in the Rayleigh number leads to increase the average Nusselt number and to decrease the Bejan number. Also, it was found that both, S th , and S tot , increase slightly with the increase in Rayleigh number until they reach (Ra = 10 5) and then begin to jump after this value. After (Ra = 10 5), the increase in both, S tot , and S fr , is greater than S th. Moreover, it was observed that iso-surfaces of S tot are similar to S th at (10 3 ≤ Ra ≤ 10 5), while they are similar to S fr at high Rayleigh number.

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“…Mixed convection flow is accomplished in diverse transport processes and thermal engineering applications including lubrication technologies, cooling of electronic equipment, high-performance building isolation, multi-shield structures utilized for nuclear reactors, food processing, ovens, solar power collectors, glass manufacture, drying technologies, chemical processing devices and others [1][2]. A concise review of literature exhibits that the analysis of mixed convection heat transfer in cavities has attracted noticeable attention in the past few decades [3][4][5][6][7][8][9]. Also, there has been boosted interest in examining buoyancy motivated flow by heat transfer from various geometries saturated porous media.…”

Section: Introductionmentioning

confidence: 99%

MHD Mixed Bioconvection in a Square Porous Cavity Filled by Gyrotactic Microorganisms

Mansour¹,

Rashad²,

Mallikarjuna³

et al. 2019

IJHT

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A numerical investigation of magneto-hydrodynamic mixed convection in a square lid-driven cavity filled with gyrotactic micro-organisms is examined. Different magnetic field inclinations are considered and the left wall of the lid-driven cavity is moving up with a constant speed in the vertical direction. The left and right vertical walls of the cavity are assumed to be adiabatic. The top horizontal wall of the cavity is assumed to be kept at features of the solution. Lower temperature, while the bottom horizontal wall is kept in a higher temperature. The developed equations of the mathematical model are put in their dimensionless forms and then solved numerically subject to appropriate boundary conditions by the control finite volume method. Comparisons with previously published works are presented and found to be in excellent agreement. The problem was studied by varying the Richardson number (Ri=0.01-2.0), Rayleigh number (Ra=10 2 -10 5 ), magnetic field inclination angle ( =0 o -350 o ), Hartman number (Ha=0-50), and bio-convection Rayleigh number (Rb=10-40). A parametric study is performed and a set of graphical results is presented and discussed to demonstrate interesting.

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Mixed convection and entropy generation in a nanofluid filled cubical open cavity with a central isothermal block

Cited by 117 publications

References 43 publications

Heat transfer inside a horizontal channel with an open trapezoidal enclosure subjected to a heat source of different lengths

Heat transfer inside a horizontal channel with an open trapezoidal enclosure subjected to a heat source of different lengths

Computational study of natural convection and entropy generation in 3-D cavity with active lateral walls

MHD Mixed Bioconvection in a Square Porous Cavity Filled by Gyrotactic Microorganisms

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