TY - JOUR
TI - Experimental investigation of natural convection in an enclosure with partial partitions at different angles
AU - Ghazian Osameh
AU - Rezvantalab Hossein
AU - Ashjaee Mehdi
JN - Thermal Science
PY - 2014
VL - 18
IS - 4
SP - 1133
EP - 1144
PT - Article
AB - Natural convection heat transfer in a partially partitioned enclosure has  been investigated experimentally using Mach-Zehnder Interferometry technique.  The top and bottom of the enclosure are insulated while one of the vertical  walls is heated isothermally. The partitions are made of wood fiber and are  attached to the heated wall with angles changing from 30° to 150° in  different experiments. The length of each partition is equal to the width of  the enclosure, therefore dividing the enclosure to isolated cells only at  90°. At other angles the cells are interconnected near the cold wall.  Rayleigh number based on the enclosure width is changed from 3500 to 32000.  Results for the local and the average Nusselt numbers at the heated wall of  the enclosure are presented and discussed for various partition angles and  Rayleigh numbers. It is found that, at each Rayleigh number, there exists an  optimum inclination angle which minimizes the average Nusselt number.