Cooling of a Vertically Oriented Air-Ventilated Square Cavity
Hazim Jassim Jaber†, Ali Abd Al-Nabi Abaas‡, Faez Abid Muslim Abd Ali†, Laith Jaafer Habeeb†‡
†Mechanical Engineering Department, Faculty of Engineering, University of Kufa, Al Najaf-Iraq
‡Mustansiriyah University, Government Contracts Division, Baghdad, Iraq
†‡Training and Workshop Center, University of Technology, Baghdad, Iraq
Corresponding Author Email: [email protected]
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This numerical analysis is performed to investigate the performance of mixed convection in a vertically oriented air-cooled square cavity. One inlet/outlet placement conﬁguration, when both the inlet and the outlet ports are located at the same bottom side, is considered. The numerical approach is based on the ﬁnite volume method integrated in an in-house formulated FORTRAN code to computationally solve the two-dimensional Naiver Stock and energy equations with corresponding boundary conditions. The eﬀect of aiding buoyancy on the ﬂow ﬁeld in a vertical downward laminar jet is examined for Richardson number (0 ≤ Ri ≤ 5) and Reynolds number (25 ≤ Re ≤ 100), with constant physical properties. The results indicate that the increase in Reynolds number increases signiﬁcantly the average Nussle number; however, the increase in Richardson number slightly aﬀect the amount of heat removal from the cavity. The fundamental nature of the resulting interaction between the buoyancy driven ﬂow and the forced external ﬂow demonstrated by the patterns of the streamlines and isotherms. Importantly, it is found that the placement conﬁguration considered provides unfavorable ﬂow and thermal distributions, and is not beneﬁcial for heat elimination, for most of Reynolds and Richardson values.