Author/Authors :
Sheidani ، Armin Department of Mechanical Engineering - University of Polytechnic of Milan , Noori ، Sahar Department of Aerospace engineering - Amirkabir University of Technology , Kamari ، Djavad Department of Aerospace Engineering - Amirkabir University of Technology
Abstract :
In this study, the effect of different configurations of three plates in an air-filled container, including vertical, horizontal and tilted, on coupled radiation and natural convection heat transfer has been numerically investigated. The cavity s side walls were kept at a constant temperature, while the upper and lower walls were thermally insulated. In addition, non-uniform temperature distribution was applied to each of the plates. Moreover, this research studied the effect of coupled heat transfer on flow separation and local Nusselt number. The flow separation on the heated plates due to the thermal gradients was captured, and the subsequent effects were discussed. Also, the results reveal two main flow patterns: separation of the convective flow and stretching of the clockwise vortex, which is created by combined heat transfer. It was also demonstrated that these flow patterns are the main ones responsible for variations in heat transfer. Also, it was demonstrated that the plate configuration plays a vital role in combined heat transfer as a horizontal placement of the plates may increase the Nusselt number variation along the plate up to 60 times compared to the vertical counterpart.
