Autor: Bouchoucha, F. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Guided wave propagation in thermal media through the semi analytical finite element method
Autorzy:: Bouchoucha, F.
Chaabane, S.
Ichchou, M. N.
Haddar, M.
Powiązania:: https://bibliotekanauki.pl/articles/281275.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: semi analytical finite element
thermal media
dispersion
velocity
Opis:: In this paper, the issue of the estimation of wave propagation characteristics in thermal media is dealt with. A formulation, named the Thermal Semi Analytical Finite Element, based on the semi analytical finite element approach coupled with the thermal effect is offered. Temperature variations affect the mechanical properties of the waveguide. The question of dispersion curves and group velocities is studied. This study is expected to be of use in the sensitivity analysis of guided waves for wave propagation in thermal environment. Comparisons between numerical and analytical results are given to show the effectiveness of the proposed approach.
Źródło:: Journal of Theoretical and Applied Mechanics; 2016, 54, 1; 285-293
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Entropy production due to conjugate natural convection in a nanofluid-filled enclosure with a stepped wall
Autorzy:: Bouchoucha, Abd el
Oztop, Hakan F.
Bessaih, Rachid
Abu-Hamdeh, Nidal
Powiązania:: https://bibliotekanauki.pl/articles/38894787.pdf
Data publikacji:: 2023
Wydawca:: Instytut Podstawowych Problemów Techniki PAN
Tematy:: entropy generation
natural convection
nanofluids
cavity
wall
Opis:: The main aim of this paper is to improve the heat transfer in a square cavity with a body at the left wall filled with a Al₂O₃/water nanofluid for different geometries. Numerous simulation experiments are conducted. A relative temperature is maintained at the vertical and top horizontal walls while the bottom wall is warm. The finite volume approach is considered to resolve the equations governing the thermal transfer flow in the physical domain based on the SIMPLER algorithm. In this study, different values of the following parameters are considered: Rayleigh number (10⁴ ≤ Ra ≤ 10⁵) and solid volume fraction (0 ≤ φ ≤ 0.1) of nanoparticles (NPs). Parameters, such as the Rayleigh (Ra) and Bejan (Be) numbers, thermal conductivity, body’s dimensions, and NPs volume fraction, which directly affect the entropy generation and heat transfer rate, are studied in a particular way. The obtained results show that entropy generation goes ahead with the Ra increase and inverse to the solid volume fraction increase. One can notice that the heat transfer has a proportional relation with φ and Ra.
Źródło:: Engineering Transactions; 2023, 71, 2; 161-183
0867-888X
Pojawia się w:: Engineering Transactions
Dostawca treści:: Biblioteka Nauki

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