Browsing by Author "Benabdallah, F"

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    Single-channel cooling system design by using perforated porous insert and modeling with POD for double conductive panel
    Selimefendigil, F; Benabdallah, F; Ghachem, K; Albalawi, H; Alshammari, BM; Kolsi, L
    In this study, a single cooling channel system is suggested for conductive double panel systems. The cooling channel for the vertical component uses perforated porous insert (PP-I) and porous insert (P-I), while cylinders are used in the PP-I case. The permeability of the porous channel (Da between 1 0 - 5 1{0}<^>{-5} and 1 0 - 1 1{0}<^>{-1} ), size of the cylinders (Rc between 0 and 0.25), and location of the PP plate (Yp between 1 and 4.5) are all taken into account when calculating the effectiveness of the cooling system using finite element method. It is found that PP-I can effectively control the vortex size and enhance cooling performance, particularly for vertical plate. Nusselt number is enhanced in the absence of cylinders in the vertical channel by 92% as contrasted to 51% in the presence of cylinders. When cylinders are used for the vertical channel, the temperature drop of 1 3 degrees C 1{3}<^>{<^>\circ }{\rm{C}} is computed. The flow field noticeably changes when the permeability of the P-I and PP-I is altered. The equivalent temperature increases for P-I and PP-I with setups at Da = 1 0 - 5 {\rm{Da}}=1{0}<^>{-5} and Da = 1 0 - 2 {\rm{Da}}=1{0}<^>{-2} are 7.7 degrees C {\text{7.7}}<^>{<^>\circ }{\rm{C}} and 4.4 degrees C {\text{4.4}}<^>{<^>\circ }{\rm{C}} , respectively. The performance of cooling for the vertical plate is influenced favorably by the higher values of the porous plate's vertical placement. By moving the porous object, it is possible to reduce the temperature by 8 degrees C {8}<^>{<^>\circ }{\rm{C}} . For panel surface temperature, a proper orthogonal decomposition (POD)-based reconstruction model with 12 POD modes is used. The POD-based model accurately captures the effects of utilizing P-I and PP-I on the panel temperature.
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    Effects of using sinusoidal porous object (SPO) and perforated porous object (PPO) on the cooling performance of nano-enhanced multiple slot jet impingement for a conductive panel system
    Selimefendigil, F; Benabdallah, F; Ghachem, K; Albalawi, H; Alshammari, BM; Kolsi, L
    Cooling system design for thermal management of electronic equipment, batteries and photovoltaic (PV) modules is important for increasing the efficiency, safety operation, and long life span the products. In the present study, two different cooling systems are proposed with nano-enhanced multiple impinging jets for a conductive panel. The present cooling systems can be used in electronic cooling and PV modules. Perforated porous object (PPO) and sinusoidal porous object (SPO) are used in the jet cooling system. 2D numerical analysis using finite volume method is conducted considering different values of permeability of the objects (Darcy number ( Da ) between 10-6 and 10-1 ). When PPO is used in the cooling system, number of cylinders (between 1 and 6), and size of the cylinders (between 0.015 and 0.075) are considered. In the case of using SPO, amplitude (between 0.1 and 2) and wave number (between 1 and 12) are varied. Alumina-water nanofluid with cylindrical shaped nanoparticles is used as the heat transfer fluid. When permeability is changed for PPO, the average temperature increases by roughly 3.89 degrees C for a single cylinder and drops by roughly 0.57 degrees C for a sixcylinder cases. Increasing the size of the cylinder in the PPO case at highest permeability results in temperature drop of 5.3 degrees C. When changing the number of cylinders, cooling rate varies by about 3.6%. Wave number of SPO is more influential on the cooling performance enhancement as compared to amplitude and permeability of the SPO. The average surface temperature drops by 12.4 degrees C when the wave number is increased to 12. As compared to reference case of jet impingement cooling without porous object, using PPO and SPO along with the nanofluid result in temperature drop of 12.3 degrees C and 14.4 degrees C. (c) 2024 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).