NATURAL CONVECTION HEAT TRANSFER WITHIN OCTAGONAL ENCLOSURE

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SAHA G.; SAHA S.; HASAN M.N.; ISLAM M.D.Q.

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Paper Information

Journal: International Journal of Engineering Year:2010 | Volume:23 | Issue:1 (TRANSACTIONS A: BASICS) Page(s): 1-10

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Information Journal Paper

Title

NATURAL CONVECTION HEAT TRANSFER WITHIN OCTAGONAL ENCLOSURE

Author(s)

SAHA G. | SAHA S. | HASAN M.N. | ISLAM M.D.Q. | Issue Writer Certificate

Keywords

NATURAL CONVECTION

PENALTY FINITE ELEMENT

NUSSELT NUMBER

OCTAGONAL ENCLOSURE

RAYLEIGH NUMBER

Abstract

The problem of steady, laminar and incompressible NATURAL CONVECTION flow in an octagonalenclosure was studied. In this investigation, two horizontal walls were maintained at a constant hightemperature, two vertical walls were kept at a constant low temperature and all inclined walls wereconsidered adiabatic. The enclosure was assumed to be filled with a Bousinessq fluid. The studyincludes computations for different Prandtl numbers Pr such as 0.71, 7, 20 and 50 whereas the Rayleighnumber Ra was varied from 103 to 106. The pressure-velocity form of Navier-Stokes equations andenergy equation was used to represent the mass, momentum and energy conservations of the fluidmedium in the enclosure. The governing equations and boundary conditions were converted todimentionless form and solved numerically by PENALTY FINITE ELEMENT method with discretization bytriangular mesh elements. Flow and heat transfer characteristics were presented in terms of streamlines, isotherms and average NUSSELT NUMBER Nu. Results showed that the effect of Ra on the convection heattransfer phenomenon inside the enclosure was significant for all values of Pr studied (0.71-50). It wasalso found that, Pr influence NATURAL CONVECTION inside the enclosure at high Ra (Ra > 104).

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APA: Copy

SAHA, G., HASAN, M.N., ISLAM, M.D.Q., & SAHA, S.. (2010). NATURAL CONVECTION HEAT TRANSFER WITHIN OCTAGONAL ENCLOSURE. INTERNATIONAL JOURNAL OF ENGINEERING, 23(1 (TRANSACTIONS A: BASICS)), 1-10. SID. https://sid.ir/paper/574786/en

Vancouver: Copy

SAHA G., HASAN M.N., ISLAM M.D.Q., SAHA S.. NATURAL CONVECTION HEAT TRANSFER WITHIN OCTAGONAL ENCLOSURE. INTERNATIONAL JOURNAL OF ENGINEERING[Internet]. 2010;23(1 (TRANSACTIONS A: BASICS)):1-10. Available from: https://sid.ir/paper/574786/en

IEEE: Copy

G. SAHA, M.N. HASAN, M.D.Q. ISLAM, and S. SAHA, “NATURAL CONVECTION HEAT TRANSFER WITHIN OCTAGONAL ENCLOSURE,” INTERNATIONAL JOURNAL OF ENGINEERING, vol. 23, no. 1 (TRANSACTIONS A: BASICS), pp. 1–10, 2010, [Online]. Available: https://sid.ir/paper/574786/en

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