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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 0.7

ISSN Druckformat: 1940-2503
ISSN Online: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2014010294
pages 129-142

MIXED CONVECTION IN A NANOFLUID-FILLED VENTED RECTANGULAR CAVITY: SUCTION AND INJECTION HEAT PERFORMANCE

Ahmed Bahlaoui
Sultan Moulay Slimane university, Faculty of Sciences and Technologies, Physics Department, UFR of Sciences and Engineering of Materials, Team of Flows and Transfers Modelling (EMET), B.P. 523, Béni-Mellal, Morocco
Abdelghani Raji
Sultan Moulay Slimane university, Faculty of Sciences and Technologies, Physics Department, UFR of Sciences and Engineering of Materials, Team of Flows and Transfers Modelling (EMET), B.P. 523, Béni-Mellal, Morocco
Mohammed Hasnaoui
University Cadi Ayyad, Faculty of Sciences Semlali
Mohamed Naimi
Faculty of Sciences and Technologies, Physics Department, Laboratory of Flows and Transfers Modeling (LAMET), Sultan Moulay Slimane University, B.P. 523, Beni-Mellal, Morocco

ABSTRAKT

In this paper, we examine mixed convection in a horizontal ventilated enclosure filled with water−Al2O3 nanofluid. The mixed convection effect is attained by heating the bottom wall at a constant hot temperature and cooling the cavity through an injected or sucked imposed flow. The flow enters the enclosure through an opening located in the lower part of the left vertical wall and leaves from the upper part of the right vertical wall. The remaining boundaries are considered adiabatic. The effects of some pertinent parameters such as the Reynolds number, 200 ≤ Re ≤ 5000, and the solid volume fraction of the nanoparticles, 0 ≤ φ ≤ 0.1, on flow and thermal fields and the resulting heat transfer are examined for the two ventilation modes (injection and suction). The obtained results show that the presence of nanoparticles contributes to enhancement of the heat transfer and an increase in the mean temperature within the cavity. In addition, the Reynolds number and the mode of imposed external flow affect the dynamical and thermal flow structures. Also, it was found that the fluid suction mode favors the heat transfer in comparison with the case of the fluid injection mode.