Combined Natural Convection and Thermal Radiation Heat Transfer in a Triangular Enclosure with an Inner Rectangular Body

Amrani, Abdel Illah; Dihmani, Nadia; Amraqui, Samir; Mezrhab, Ahmed

doi:10.4028/www.scientific.net/ddf.384.49

Cited by 13 publications

(11 citation statements)

References 28 publications

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“…Also, it had been observed that increasing inner circular cylinder diameter augments the heat transfer obviously. Another important investigation had been reported in Amrani et al [38]. The authors studied the combined effect of radiation as well as free convective flow for triangular enclosure within rectangular body.…”

Section: Figure 3 Schematic Diagram Of the Inner Body In A Triangular Enclosure [32]mentioning

confidence: 99%

Comprehensive Review of Natural Convection Heat Transfer in Annulus Complex Enclosures

Abdulkadhim

Al‐Farhany

Abed

et al. 2020

QJES

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The natural convection heat transfer has many applications in engineering like solar collectors, cooling of electronic equipment and geothermal engineering. The present work demonstrates the recent publications in the last ten years in this specific subject for a body located in complex shapes like rhombic, wavy, trapezoidal, elliptical and Parallelogrammic enclosure. Many parameters like Ra, Nu, number of undulations, the position of the inner body had been addressed and discuss to draw the main conclusions and recommendations. It is worthy to mention that wavy enclosure had been investigated less than the other simple enclosure shapes due to its complexity. Beside that entropy generation should be included in the future studies in complex shapes of enclosure as this will helps the researchers to extended their studies. The inner bodies inside trapezoidal, parallelogrammic enclosure are very limited and more investigation should be done.

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Section: Figure 3 Schematic Diagram Of the Inner Body In A Triangular Enclosure [32]mentioning

confidence: 99%

Comprehensive Review of Natural Convection Heat Transfer in Annulus Complex Enclosures

Abdulkadhim

Al‐Farhany

Abed

et al. 2020

QJES

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“…Enclosure heated from below only is reported by Asan and Namli (2001), Mahmoudi (2011), Kamiyo et al (2014) and Cui et al (2019). Enclosure heated from above only is studied by Akinsete and Coleman (1982), Asan and Namli (2000) and Amrani et al (2017). Ridouane et al (2005), Mahmoudi et al (2013) Recently, some complex roofs reported include dome (Das and Morsi, 2002), inclined triangular cavity (Mahmoudi et al, 2013), asymmetric triangular cavity (Kamiyo et al, 2014) and baffled triangular enclosure (Saha and Gu, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…However, with the development of advanced numerical methods that could accurately predicted problems of flows in enclosed surfaces, majority of the authors have used modelling approach. In the past decade, the numerical modelling studies reported include those of , , Ching et al (2012), Yesiloz and Aydin (2013), Kamiyo et al (2014), Mirabedin (2016) and Amrani et al (2017) while the few experimental studies are those of Anderson et al (2010), Oztop et al (2012), Yesiloz and Aydin (2013), Raj et al (2018) and Michels et al (2018). In most cases, sealed attics are considered but there are few reports on vented attics , , Raj et al (2018)).…”

Section: Introductionmentioning

confidence: 99%

“…Ridouane et al (2005), Mahmoudi et al (2013) Recently, some complex roofs reported include dome (Das and Morsi, 2002), inclined triangular cavity (Mahmoudi et al, 2013), asymmetric triangular cavity (Kamiyo et al, 2014) and baffled triangular enclosure (Saha and Gu, 2015). Others are vertical upright-angled triangular cavity (Sieres et al, 2016), gable roofs Amrani et al, 2017), sectioned-triangular prismatic enclosure (Cui et al, 2019) and trapezoidal enclosure (Mehryan et al, 2020). Many other complex-shaped roofs have been studied but there are still some Kufa Journal of Engineering, Vol.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Natural Convective Heat Transfer Within M-Shaped Roofs

Kamiyo

2021

KJE

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Natural convective heat transfer in M-shaped roofs has been investigated using CFD approach with the aim of determining the flowfield and thermal characteristics of the attic when heated through the ceiling for pitch angles 14 o , 20 o , 25 o and 35 o and Rayleigh number between 10 6 and 10 7 . The results show that the 'M' shape of the roof has strong influence on the airflow pattern and heat transfer. For all the roof pitches, counterrotating cells with varying intensities and thermal plumes are obtained. The air velocity variation laterally across the attic forms a sequence that mimics the flowfield thus enabling the relative size of a cell and its intensity at a position in an attic of a particular pitch to be predicted. The size of the twin vortices at the central area is found to increase by 4% with the roof pitch. As the pitch increases, the thermal plumes get thicker while their number reduces and heat transfer rate decreases.

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“…From literature, it was clear that there were limited numerical studies on the not classical geometries of cavities especially the triangular shapes. But there were little numerical studies in two-dimensions like those of [38][39][40][41][42]. Where Xu et al [38] cavity was triangular cold and tilted by different inclination angles and having inner hot cylinder.…”

Section: Introductionmentioning

confidence: 99%

The natural convection inside a 3D triangular cross section cavity filled with nanofluid and included cylinder with different arrangements

Ghoben¹,

Hussein²

2022

Diagnostyka

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In this paper the laminar unsteady natural convection heat transfer of (Al2O3-water) nanofluid inside 3D triangular cross section cavity was investigated. The cavity was heated differentially, the vertical walls were kept at different constant temperatures. The left hot and the right cold. The effect of the solid volume fraction was examined for two values and compared with the pure water results. The (Ra) range studied was (103 ≤ Ra ≤ 106). Inserting cylindrical body inside the cavity also investigated in three cases. One concentric cylinder has radius (15%) of the cavity side length. The other cases were of two cylinders having radius (7.5%) of the cavity side length, aligned vertically or nonaligned. The results show that the higher solid volume fraction gives the maximum enhancement of the average (Nu) and this enhancement increases with (Ra) increase. For the cases with inner cylinders, the average (Nu) enhanced for the case of double cylinders over single cylinder. On other hand, the nonaligned position of the cylinders giving more enhancement than other position. As like as, the location of maximum horizontal or vertical velocities were varied with the cylinders position while (Ra) has no effect.

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Combined Natural Convection and Thermal Radiation Heat Transfer in a Triangular Enclosure with an Inner Rectangular Body

Cited by 13 publications

References 28 publications

Comprehensive Review of Natural Convection Heat Transfer in Annulus Complex Enclosures

Comprehensive Review of Natural Convection Heat Transfer in Annulus Complex Enclosures

Numerical Study of Natural Convective Heat Transfer Within M-Shaped Roofs

The natural convection inside a 3D triangular cross section cavity filled with nanofluid and included cylinder with different arrangements

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