Professional paper

Geometry Optimization of Two Infinite Parallel Plates with Free Convection Heat Transfer

Nader Nourdanesh ; Young Researchers and Elite Club, Ilkhchi Branch, Islamic Azad University, Ilkhchi, Iran
Navid Farrokhi ; Young Researchers and Elite Club, Ilkhchi Branch, Islamic Azad University, Ilkhchi, Iran
Farshid Mosaddeghi ; Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

Abstract

In this study, geometrical optimization of two infinitive plates for the enhancement of heat transfer between the plates is investigated by considering free convection and thermal radiation as heat transfer mechanisms. It is assumed that heat sources with specified length are placed in a linear array with infinitive length on the lower plate. These heat sources are placed at a specified distance between them. Heat flux of the heat sources and the temperature of the upper cold plate are the given data, and the mean temperature of the heat sources, the temperature difference between the upper cold plate and the mean temperature of the heat sources and the Nusselt number are the major parameters for optimizing the geometry of the plates. First, the problem is solved for two familiar geometries: when there exists an upper plate and when it is omitted. Eventually, a situation in which there are vents in the lower and the upper plate is investigated, and the optimum position of these vents as well as their sizes are obtained. The results show that placing vents on the plates can be very effective for enhancing heat transfer from the heat sources. For a particular array of heat sources and vents on the plates, the Nusselt number has the highest magnitude in comparison with other geometries, and consequently, the maximum heat transfer is available.

Keywords

optimization; heat transfer; free convection; thermal radiation

Hrčak ID:

148558

URI

https://hrcak.srce.hr/148558

Publication date:

18.11.2015.

Visits: 1.623 *