... in a natural chamber. The effects of the inclination angle of the chimney, Richardson and Reynolds numbers on the average heat and mass transfer rate, average temperature, average Bejan number, and performance evaluation criterion (PEC) inside the system are evaluated. Boundary layer analysis is performed...

... and 0.04 to 0.053, respectively. In contrast, the flow parameter, like the Reynolds number, is kept in the range of 4 × 10 3 to 18 × 10 3 . A maximal performance evaluation criterion of 1.51 is attained for the W-shape ribs with a non-dimensional pitch of 7.14 and a non-dimensional height of 0.047...