### Abstract

The aim of the present numerical study is to analyze the conjugate natural convection heat transfer in a differentially heated square enclosure containing a conductive polygon object. The left wall is heated and the right wall is cooled, while the horizontal walls are kept adiabatic. The COMSOL Multiphysics software is applied to solve the dimensionless governing equations. The governing parameters considered are the polygon type, 3≤N≤∞, the horizontal position, 0.25≤X0≤0.75, the polygon size, 0≤A≤π/16, the thermal conductivity ratio, 0.1≤Kr≤10.0, and the Rayleigh number, 103≤Ra≤106. The critical size of the solid polygon was found exists at low conductivities. The heat transfer rate increases with the increase of the size of the solid polygon, until it reaches its maximum value. Here, the size of the solid polygon is reaches its critical value. Further, beyond this critical size of the solid polygon, will decrease the heat transfer rate.

Original language | English |
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Article number | 617492 |

Journal | Scientific World Journal |

Volume | 2014 |

DOIs | |

Publication status | Published - 2014 |

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### ASJC Scopus subject areas

- Biochemistry, Genetics and Molecular Biology(all)
- Environmental Science(all)
- Medicine(all)

### Cite this

*Scientific World Journal*,

*2014*, [617492]. https://doi.org/10.1155/2014/617492

**Natural convection in a differentially heated square enclosure with a solid polygon.** / Roslan, R.; Saleh, H.; Hashim, Ishak.

Research output: Contribution to journal › Article

*Scientific World Journal*, vol. 2014, 617492. https://doi.org/10.1155/2014/617492

}

TY - JOUR

T1 - Natural convection in a differentially heated square enclosure with a solid polygon

AU - Roslan, R.

AU - Saleh, H.

AU - Hashim, Ishak

PY - 2014

Y1 - 2014

N2 - The aim of the present numerical study is to analyze the conjugate natural convection heat transfer in a differentially heated square enclosure containing a conductive polygon object. The left wall is heated and the right wall is cooled, while the horizontal walls are kept adiabatic. The COMSOL Multiphysics software is applied to solve the dimensionless governing equations. The governing parameters considered are the polygon type, 3≤N≤∞, the horizontal position, 0.25≤X0≤0.75, the polygon size, 0≤A≤π/16, the thermal conductivity ratio, 0.1≤Kr≤10.0, and the Rayleigh number, 103≤Ra≤106. The critical size of the solid polygon was found exists at low conductivities. The heat transfer rate increases with the increase of the size of the solid polygon, until it reaches its maximum value. Here, the size of the solid polygon is reaches its critical value. Further, beyond this critical size of the solid polygon, will decrease the heat transfer rate.

AB - The aim of the present numerical study is to analyze the conjugate natural convection heat transfer in a differentially heated square enclosure containing a conductive polygon object. The left wall is heated and the right wall is cooled, while the horizontal walls are kept adiabatic. The COMSOL Multiphysics software is applied to solve the dimensionless governing equations. The governing parameters considered are the polygon type, 3≤N≤∞, the horizontal position, 0.25≤X0≤0.75, the polygon size, 0≤A≤π/16, the thermal conductivity ratio, 0.1≤Kr≤10.0, and the Rayleigh number, 103≤Ra≤106. The critical size of the solid polygon was found exists at low conductivities. The heat transfer rate increases with the increase of the size of the solid polygon, until it reaches its maximum value. Here, the size of the solid polygon is reaches its critical value. Further, beyond this critical size of the solid polygon, will decrease the heat transfer rate.

UR - http://www.scopus.com/inward/record.url?scp=84903641469&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84903641469&partnerID=8YFLogxK

U2 - 10.1155/2014/617492

DO - 10.1155/2014/617492

M3 - Article

VL - 2014

JO - Scientific World Journal

JF - Scientific World Journal

SN - 2356-6140

M1 - 617492

ER -