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    COMPARATIVE ANALYSIS OF SOLAR AIR CHANNELS, z-SHAPED OBSTACLES ADDED TO IMPROVE FLOW STRUCTURE
    (Vinca Inst Nuclear Sci, 2022) Afif, Benameur; Salmi, Mohamed; Akgul, Ali; Jarrar, Rabab; Asad, Jihad; Menni, Younes
    This paper's numerical study, which applies the finite volume approach and SIMPLE algorithm, aims to dynamically analyze airflow through a channel with Z-obstacles. Three distinct models were used to place the Z-barriers inside the channel. According to Demartini et al.'s model (2004) and as depicted in example A from the present analysis, the first Z-barrier (fin) is attached to the top wall (heated) and the second (baffle) to the bottom wall (insulated). The Z-barriers, on the other hand, were positioned in the second model on the same wall (in-line arrangement), either on the top surface (two fins in example B) or on the bottom wall (two baffles in example C). With the help of these studies, fluid dynamics in solar air collectors with barriers will be better understood and designed.
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    Öğe
    TURBULENT FLOWS AROUND RECTANGULAR AND TRIANGULAR TURBULATORS IN BAFFLED CHANNELS A Computational Analysis
    (Vinca Inst Nuclear Sci, 2022) Salmi, Mohamed; Afif, Benameur; Akgul, Ali; Jarrar, Rabab; Shanak, Hussein; Menni, Younes; Ahmad, Hijaz
    The present paper highlights a computational analysis of air-flows around rectangular and triangular turbulators inside baffled heat exchanger channels in order to improve heat transfer between the fluid and their heated areas. The dynamic and thermal fields as well as fluid temperature curves at the outlet of the exchanger are studied. The computational study is conducted by utilizing SIMPLE algorithm with FLUENT system based on the finite volumes. The analysis clearly demonstrated the presence of highly turbulent flows and the appearance of many vortices in various regions of the exchanger. By comparing the different heat exchangers, it was found that the baffled channel fitted with rectangular turbulators produced high fluid temperature values at the channel outlet, indicating the significance of using this rectangular form of turbulators in order to enhance the interaction between the hot spaces and the used fluid.