International Journal of Mathematical, Engineering and Management Sciences

ISSN: 2455-7749

Forced Convection through Discrete Heat Sources and Simple Thermal Model – A Numerical Study

Kartikaswami Hasavimath
Department of Studies in Mechanical Engineering, University B. D. T. College of Engineering, Davanagere -577004, Karnataka, India.

Kishan Naik
Department of Studies in Mechanical Engineering, University B. D. T. College of Engineering, Davanagere -577004, Karnataka, India.

Banjara Kotresha
Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal – 575025, Karnataka, India.

N. Gnanasekaran
Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal – 575025, Karnataka, India.

DOI https://dx.doi.org/10.33889/IJMEMS.2019.4.6-110

Received on January 05, 2019
  ;
Accepted on August 22, 2019

Abstract

In this work a forced convection through discrete heat sources and simple thermal model placed inside the vertical channel is analyzed numerically. The problem considered for the investigation comprises of a vertical channel with distinct heat source assembly located at the center of the channel. The novelty of the present work is to replace the discrete heat source assembly by a simple thermal model to obtain uniformly distributed temperature and streamlines. A conjugate heat transfer investigation is carried out because the problem domain consists of aluminum solid strips as well as Bakelite strips in discrete heat source assembly which are replaced by a aluminum solid in case of simple thermal model. The numerically obtained data are initially compared with experimental data for the purpose of validation. The temperature of each discrete sources decrease with increase in inlet velocity of the fluid and bottom heat source is able to take higher heat load. The results in terms excess temperature obtained for both discrete heat source and simple thermal model is presented and discussed.

Keywords- Vertical channel, Mixed convection, Simple thermal model, Discrete heat sources.

Citation

Hasavimath, K., Naik, K., Kotresha, B., & Gnanasekaran, N. (2019). Forced Convection through Discrete Heat Sources and Simple Thermal Model – A Numerical Study. International Journal of Mathematical, Engineering and Management Sciences, 4(6), 1397-1406. https://dx.doi.org/10.33889/IJMEMS.2019.4.6-110.

Conflict of Interest

The authors confirm that there is no conflict of interest to declare for this publication.

Acknowledgements

The authors would like to express their sincere thanks to the referees and for their valuable suggestions towards the improvement of the paper and also the CMFDP-2019 conference coordinators.

References

Ahamad, S.I., & Balaji, C. (2015). A simple thermal model for mixed convection from protruding heat sources. Heat Transfer Engineering, 36(4), 396–407.

Chen, C.C., Huang, P.C., & Hwang, H.Y. (2013). Enhanced forced convective cooling of heat sources by metal-foam porous layers. International Journal of Heat and Mass Transfer, 58(1-2), 356-373.

Chen, Y.C., & Chung, J.N. (1996). The linear stability of mixed convection in a vertical channel flow. Journal of Fluid Mechanics, 325, 29-51.

Ghorab, M.G. (2015). Forced convection analysis of discrete heated porous convergent channel, Heat Transfer Engineering, 36(9), 829–846.

Gururaja Rao, C., Balaji, C., & Venkateshan, S.P. (2002). Effect of surface radiation on conjugate mixed convection in a vertical channel with a discrete heat source in each wall. International Journal of Heat and Mass Transfer, 45(16), 3331–3347.

Hadim, A., & Chen, G. (1994). Non-darcy mixed convection in a vertical porous channel with discrete heat sources at the walls. International Communications in Heat and Mass Transfer, 21(3), 377-387.

Hotta, T.K., Balaji, C., & Venkateshan, S.P. (2014). Optimal distribution of discrete heat sources under mixed convection—a heuristic approach. Journal of Heat Transfer, 136(10), 104503-5.

Hotta, T.K., Muvvala, P., & Venkateshan, S.P. (2013). Effect of surface radiation heat transfer on the optimal distribution of discrete heat sources under natural convection. Heat and Mass Transfer, 49(2), 207–217.

Kamath, P.M., Balaji, C., & Venkateshan, S.P. (2014). Heat transfer enhancement with discrete heat sources in a metal foam filled vertical channel. International Communications in Heat and Mass Transfer, 53, 180–184.

Kotresha, B., & Gnanasekaran, N. (2019). A synergistic combination of thermal models for optimal temperature distribution of discrete sources through metal foams in a vertical channel. Journal of Heat Transfer, 141(2), 022004 (1-8).

Premachandran, B., & Balaji, C. (2006). Conjugate mixed convection with surface radiation from a horizontal channel with protruding heat sources. International Journal of Heat and Mass Transfer, 49(19-20), 3568-3582.

Sankar, M., Park, J., Kim, D., & Do, Y. (2013). Numerical study of natural convection in a vertical porous annulus with an internal heat source: effect of discrete heating. Numerical Heat Transfer-Part A, 63(9), 687–712.

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