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

Doghmi, Hicham; Abourida, Btissam; Belarche, Lahoucin; Sannad, Mohamed; Ouzaouit, Meriem

doi:10.2298/tsci170126121d

Cited by 9 publications

(8 citation statements)

References 24 publications

(23 reference statements)

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“…A recent 3-D numerical investigation of the inlet opening effect on the mixed convection inside a 3-D ventilated cavity was presented by Doghmi et al [29]. They concluded that the global average Nusselt number at the active walls increases with increasing Richardson numbers and the heat transfer rate increase and decrease at the hot and the cold wall respectively by increasing the inlet opening cross-section.…”

Section: Ra 10mentioning

confidence: 99%

Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

et al. 2020

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The 3-D mixed convective heat transfer inside a ventilated cavity partially heated is studied numerically by using control volume method. The heating square portion similar to the integrated electronic devices is placed on the left vertical wall of the enclosure. The right vertical wall is maintained at ambient temperature and all other walls are adiabatic. The results are presented in terms of flow structures, temperature distribution, and global average Nusselt number for various combinations of thermal controlling parameters, namely, the Richardson number (0 ≤ Ri ≤ 10), the Reynolds number (10 ≤ Ri ≤ 200), the heating section dimension (0. ≤ ε ≤ 0.7), and the relative height of the openings B = h/L = 1/8. It is found that for the low Reynolds number the heat transfer process is carried out only by conduction. On the other hand, the highest thermal performance is achieved by reducing the heating section dimension.

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Section: Ra 10mentioning

confidence: 99%

Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

et al. 2020

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“…The obstacle and cavity dimensions have an influence on the flow and thermal behaviors. Mixed convection heat transfer has been studied by a number of researchers such as [15], [16], [17], [18], [19], [2] and [20]. Pourmahmoud, Ghafouri and Mirzaee [15] investigated numerically the laminar mixed convection in a cavity employed water-Al2O3, water-Cu or water-TiO2 nanofluids as medium work.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum values are obtained when using Cu nanoparticles. Mahmoodi [17] studied the mixed convection heat transfer in a 3-D ventilated cavity numerically with finite volume method. The results indicated that the flow intensity and the heat transfer rate are enhanced by an optimal choice of the Re, Ri, relative height of the openings and relative width of the openings.…”

Section: Introductionmentioning

confidence: 99%

Augmentation of convection heat transfer from a horizontal cylinder in a vented square enclosure with variation of lower opening size

2022

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Natural and mixed convection heat transfer from a horizontal cylinder placed in a vented square enclosure has been investigated using numerical method with ANSYS Fluent 16.1 software for laminar and turbulent flow. Navier- Stokes equations and energy equation with standard k-? transport equation turbulence model have been used to simulate both flow and thermal behaviors. The operating conditions covered a range of the Rayleigh number from 103 to 106 and the Richardson number range between 0.1 and 100 at variable sizes of the lower open vent with constant upper opening size. The Nusselt numbers, velocity lines and isotherms are presented to display the flow and thermal behaviors. The results displayed that the average Nusselt number is affected by Rayleigh number, Richardson number, enclosure width and lower opening size. The Nusselt number is enhanced by controlling the lower opening size. The maximum enhancement range for Nusselt number is between 20-85% depending on the Rayleigh number, Richardson number, enclosure width to cylinder diameter, and lower opening size. The velocity lines and isotherms are directly affected by the Rayleigh number, Richardson number, enclosure width to cylinder diameter, and lower opening size.

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“…In the literature, some investigation of the mixed convection in vented cavities were reported using different inlet and outlet ports location [17][18][19][20], uniform and non-uniform heated wall [21][22][23][24], adiabatic ,isothermal or heated solid block with different shape, size location and [25][26][27][28][29][30][31][32][33]. Gupta et al [34] studied a mixed convection in a ventilated cavity for different thermal conditions of the cavity walls with heated conducting cylinder at the size of D (0.1-0.5) and conductivity K (0.1-10).Considering two cases of heated walls.…”

Section: Introductionmentioning

confidence: 99%

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

et al. 2021

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The present investigation deals with the natural, mixed and forced convection in a vented rectangular cavity having a sinusoidal heated vertical wall with a conducting solid block placed at one of the nine positions. The objective is to analyze numerically using finite element method the effects of the following parameters: inlet, outlet positions, solid square positions, thermal coefficient λ, amplitude ratio ɛ, phase deviation ϕ and the solid square size on the thermo-convective flows. The Richardson number is varied from 0 to 40, the Reynolds and Prandtl numbers are fixed respectively at 100 and 0.71. To quantify the heat transfer of the solid block and to get closer to real conditions, we have developed a modification based on the evaluation of the Nusselt number using the average temperature in the cavity, unlike previous works which used the input temperature. As results, the sinusoidal temperature at the right wall gives higher heat transfer enhancement. The variation of the phase deviation and amplitude ratio have a slightly effect on the average fluid temperature and average Nusselt at the right wall and at the square solid.

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

Cited by 9 publications

References 24 publications

Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

Augmentation of convection heat transfer from a horizontal cylinder in a vented square enclosure with variation of lower opening size

Optimal Conditions of Natural and Mixed Convection in a Vented Rectangular Cavity with a Sinusoidal Heated Wall Inside with a Heated Solid Block

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