Numerical study on convective flow in a three-dimensional enclosure with hot solid body and discrete cooling

Sivasankaran, S.; Amer, Atef M.; Biswas, Anjan

doi:10.1080/10407782.2019.1618626

Cited by 13 publications

(2 citation statements)

References 31 publications

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“…Zaharudddin et al [7] numerically investigated the natural convection driven by buoyancy and Marangoni effects within a right-angled trapezoidal-shaped cavity containing water-based nanofluids. Alshomrani et al [8] investigated the effect of the cooler's placement, aspect ratio, and positioning of the heated solid object within the enclosure numerically on the three-dimensional natural convection flow. Yazdani et al [9] carried out a computational analysis on an enclosure of a trapezoidal shape filled with a non-Newtonian fluid following a power-law behavior.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2024

J. Eng. Adv.

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The effects of cavity shape by inclination angle on laminar natural convection inside trapezoidal and square-shaped cavities have been numerically investigated in this work. Several simulations had been conducted for various inclinations of the trapezoidal cavity at Rayleigh numbers (Ra) =10 5 to 10 6 in a laminar flow regime. The walls at the left and right sides of the cavities were heated isothermally, while the walls at the top and bottom sides were adiabatic. The problem was assumed to be 2-D and solved using the software package ANSYS Fluent 16.2. Cavity filled with air is examined in two distinct instances; varying boundary layers and the flow generated for the natural convection. This numerical study analyzed the flow characteristics, temperature distribution, and Nusselt number. The analysis reveals that as the Rayleigh number increases, the Nusselt number also increases, with a more pronounced effect at higher Rayleigh numbers. It has been observed that there is a substantial effect of cavity shapes on the Nusselt number. The presence of an angled wall inhibits convection resulting in stronger flow in the squared cavity compared to the trapezoidal cavity. From numerical results, it is also found that the temperature distribution at Ra = 10 5 is wider than the temperature distribution at Ra= 10 6 .

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Section: Introductionmentioning

confidence: 99%

Untitled

2024

J. Eng. Adv.

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“…The numerical free convection study in a three-dimensional cubical enclosure including a thermally active plate by Purusothaman et al (2016) indicated the effect of the active plate size on the flow and convective heat exchange and inside the cubical enclosure. Alshomrani et al (2019) also considered 3D free convection in a cubical cavity with different positions of heater and cooler, and they indicated the significant role of cooler location, Ra number and aspect ratio in the energy transport convective cooling flow inside the enclosure. Recently, Bouabdallah et al (2020) studied numerically the 3D forced convection in a cubic cavity containing two cylindrical heat sources in the middle and Chati et al (2021b) numerically analyzed the turbulent mixed convective heat transfer in a ventilated enclosure with a cylindrical/cubical heat source.…”

Section: Introductionmentioning

confidence: 99%

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Bouras¹,

Bouabdallah²,

Ghernaout³

et al. 2021

JAFM

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The considerable quantities of heat transfer are dissipated during the operating electronic/electrical systems and have harmful effects on the operating time. So; to keep these systems in good working condition, the location of efficient mechanical cooling systems is essential. The heat transfer rate in an enclosure intensely depends on the combination of geometrical and physical parameters. For this purpose, a 3D Numerical simulation of turbulent mixed convection in a cubical cavity containing an internal heat source in its middle was carried out. The cavity has an inlet port at the lower left face area and an outlet port located in the upper right face area. The analyses are performed for air at ambient circumstances (Pr = 0.71) and the variation of interval for Richardson number (Ri) is chosen between 0.01 and 30 to investigate three situations: dominated forced convection, natural convection, and mixed convection for a fixed dimension of the enclosure in turbulent regimes (Gr = 10 9 ). The effects of the variation of Ri, the dimensionless time, and the dynamic parameters on the thermal flow and fluid flow phenomena are presented and discussed. The obtained results show an exchange between the forces of pressure and of buoyancy in the studied interval and a strong dependence between the geometrical parameters and the heat transfer rate, and then the correlations of the combination of the parameters were proposed.

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Green Synthesis Design, Spectroscopic Characterizations, and Biological Activities of Novel Pyrrole Derivatives: An Application to Evaluate Their Toxic Effect on Cotton Aphids

et al. 2022

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Green synthesis design and spectroscopic characterizations of novel pyrrole derivatives (1–6) with insecticidal bioefficacy have been achieved. The toxic effect using a leaf dip bioassay method was used to assess the insecticidal bioefficacy of six ecofriendly‐synthesized pyrrole derivatives. The results demonstrated the significant insecticide effect of the proposed compounds against cotton aphids, after 24 hours of application. All these compounds (1–6) showed promising results against cotton aphids especially compound 4 with an LC50 of 0.04 ppm which had a higher activity compared to a commercial reference of Chlorfenapyr deadly agent used for cotton aphids. The biological activity profile of these compounds, using Trolox equivalent antioxidant capacity (TEAC) assay, antimicrobial activities against four gram‐positive bacteria, and antifungal activities against a yeast‐like fungus, in comparison with well‐known antimicrobial and antifungal referenced standards were evaluated and confirmed. The results revealed that some of these compounds showed antibacterial activities against bacterial species known to plant pathogenic. Additional investigation of the newly obtained derivatives was performed and discussed in this research work through computational tools to give better insights into the possible protein targets of these new analogues.

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Numerical study on convective flow in a three-dimensional enclosure with hot solid body and discrete cooling

Cited by 13 publications

References 31 publications

Untitled

Untitled

3D Numerical Simulation of Turbulent Mixed Convection in a Cubical Cavity Containing a Hot Block

Green Synthesis Design, Spectroscopic Characterizations, and Biological Activities of Novel Pyrrole Derivatives: An Application to Evaluate Their Toxic Effect on Cotton Aphids

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