Computational Investigation on Free and Forced Convection inside an Enclosure

Ali Abd Al-Nabi Abaas†, Hasanen Mohammed Hussain‡, Ali Najim Abdullah Saieed‡†, Laith Jaafer Habeeb‡‡, Humam Kareem Jalghaf‡‡†

†Mustansiriyah University / Government Contracts Division, Baghdad, Iraq

‡University of Technology, Mechanical Engineering Department.

‡†Al Rafidain University College, Department of Air-Conditioning and Refrigeration Eng. Tech., Baghdad, Iraq

‡‡University of Technology / Training and Workshops Center

‡‡†Mechanical Eng. Dept. University of Technology, Baghdad, Iraq

Corresponding Author Email: ali.alwalaa@gmail.com, hasanen.alsaady@yahoo.com, Ali.Najem@ruc.edu.iq,20021@uotechnology.edu.iq, 20310@uotechnology.edu.iq 

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Enclosure with an inlet at the base and an opposite outlet at the top was investigated numerically using finite element method. The heat was applied to the sidewall of the enclosure away from the inlet opening. The Richardson number was changed a number by the values (0, 1, 2.5, 5, and 10). For each Richardson number, Reynold number was changed into (25, 50, 100, 200, 300, 400, and 500) respectively. Average and local Nusselt number was determined during the investigation as well as the streamlines and the isothermal patterns. The results revealed that as value increases of Reynolds number in the enclosure the Nusselt number was also increased, the same way as Richardson number increased the Nusselt number in the enclosure increased.