# Numerical investigation of conjugate natural convection heat transfer in a square porous cavity heated partially from left sidewall

Numerical investigation of conjugate natural convection heat transfer in a square porous cavity heated partially from left sidewall

Khaled Al-Farhany Ammar Abdulkadhim

Department of Mechanical Engineering, University of Al-Qadisiyah, Al-Qadisiyah 58001, Iraq

Air conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Babylon 58001, Iraq

Corresponding Author Email:
khaled.alfarhany@qu.edu.iq
Page:
237-244
|
DOI:
https://doi.org/10.18280/ijht.360132
Received:
6 December 2017
|
Accepted:
5 March 2018
|
Published:
31 March 2018
| Citation

OPEN ACCESS

Abstract:

The conjugate natural convection heat transfer in a partially heated square porous enclosure had been studied numerically. The governing dimensionless equations are solved using COMSOL Multiphysics and Darcy model assumed to be used. The considering dimensionless parameters are modified Rayleigh number, finite wall thickness, thermal conductivity ratio and the heat source length. The results are presented in terms of streamlines, isotherms and local and average Nusselt number. The results indicate that; the heat transfer can be enhanced by increasing the modified Rayleigh number. When the heat source length increases, the local Nusselt number of ﬂuid phase increases, while, a reverse behavior of the local Nusselt number along the heat source is found. As the Rayleigh number increase, the local Nusselt number for both fluid and solid phase increases, therefore, the heat transfer rate will be enhanced. On the other hand, when the thermal conductivity ratio increase, the local Nusselt number for the fluid phase increases, and the local Nusselt number along the heated wall decreases.

Keywords:

natural convection, conjugate, porous, enclosure, COMSOL

1. Introduction
2. Mathematical Formulation
3. Code Validation
4. Results
5. Conclusions
Nomenclature
References

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