Combined Natural Convection and Surface Radiation Inside Vented Triangular Enclosure - An Experimental Study

Raj, Rahul; Pradyumna, K. C.; Rakshith, B. R.; Nithin, R. B.; Karthik, S. R.

doi:10.1051/matecconf/201714404019

MATEC Web Conf.

2018

DOI: 10.1051/matecconf/201714404019

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Combined Natural Convection and Surface Radiation Inside Vented Triangular Enclosure - An Experimental Study

Rahul Raj

K. C. Pradyumna²,

B. R. Rakshith³

et al.

Abstract: Abstract. In the present experimental study, the influence of Opening ratio on the chamber temperature in case of vented triangular enclosure with hot base plate has been undertaken. Due to more flow passage, the average air temperature in the enclosure decreases by 12% for OR of 0.25 and 13% for OR of 0.5 compared to OR of 0.125. Similar trend is observed for Rayleigh number with a rise of 73% in OR 0.5 compared to OR of 0.125. Further, the influence of radiation heat transfer in the natural convection based … Show more

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2021

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

Kamiyo

2021

KJE

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Combined Natural Convection and Surface Radiation Inside Vented Triangular Enclosure - An Experimental Study

Cited by 1 publication

References 7 publications

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

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

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