Combined free and forced convection in an enclosure with different ventilation arrangements

The objective of this study is to unveil the effect of different ventilation arrangements in a rectangular enclosure subjected to combined free and forced convection. A heat source is flush mounted at the bottom of the enclosure. The equations of mass, momentum and energy conservation are solved using a control-volume-based technique utilized by Ansys Fluent. A pressure based solver and second order upwind scheme is used for the solution purpose. The non -dimensional variables Richardson number (Ri) and Reynolds number (Re) were varied in the course of parametric study. It is observed that increasing the number of ventilation ports complicates the flow stfficture inside the enclosure and hence a justified provision of exit openings should be provided. The average heat source surface temperatures in the case of three ventilation ports are higher than the case of two ventilation ports beyond the Ri values of 2.0. (C) 205 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the organizing committee of ICCHMT - 2015