2022•INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENTOpen access

COMPARATIVE NUMERICAL STUDY OF NATURAL CONVECTION IN SQUARE AND TRIANGULAR CAVITY

Pranamya Bummerkar

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Abstract

This paper is based on the numerical investigation of natural convection of two vertical enclosure of square and triangular cavity with air filled. The vertical cavity consist of adiabatic and hot and cold wall with wide range of Rayleigh number from 103 to 106 with aspect ratio from 1 to 10 at the interval of 2.5. Flow patterns and isotherm plots were used to display the results, and for every case, local and mean Nusselt values were also produced. The results show that an increase in Rayleigh numbers greatly increases heat transfer, natural convection intensity, and average Nusselt number at a particular aspect ratio. Keyword: ANN (average Nusselt number), AR (aspect ratio), LNN (local Nusselt number), Nu (Nusselt number), Pr (Prandtl number), Ra (Rayleigh number).

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This paper is based on the numerical investigation of natural convection of two vertical enclosure of square and triangular cavity with air filled. The vertical cavity consist of adiabatic and hot and cold wall with wide range of Rayleigh number from 103 to 106 with aspect ratio from 1 to 10 at the interval of 2.5. Flow patterns and isotherm plots were used to display the results, and for every case, local and mean Nusselt values were also produced. The results show that an increase in Rayleigh numbers greatly increases heat transfer, natural convection intensity, and average Nusselt number at a particular aspect ratio. Keyword: ANN (average Nusselt number), AR (aspect ratio), LNN (local Nusselt number), Nu (Nusselt number), Pr (Prandtl number), Ra (Rayleigh number).

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Available abstract

This paper is based on the numerical investigation of natural convection of two vertical enclosure of square and triangular cavity with air filled. The vertical cavity consist of adiabatic and hot and cold wall with wide range of Rayleigh number from 103 to 106 with aspect ratio from 1 to 10 at the interval of 2.5. Flow patterns and isotherm plots were used to display the results, and for every case, local and mean Nusselt values were also produced. The results show that an increase in Rayleigh numbers greatly increases heat transfer, natural convection intensity, and average Nusselt number at a particular aspect ratio. Keyword: ANN (average Nusselt number), AR (aspect ratio), LNN (local Nusselt number), Nu (Nusselt number), Pr (Prandtl number), Ra (Rayleigh number).

Key concepts: Nusselt number, Prandtl number, Natural convection, Rayleigh number, Enclosure, Mechanics, Combined forced and natural convection, Aspect ratio (aeronautics)

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