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Numerical study of natural convection and acoustic waves using the lattice Boltzmann method
Author(s) -
Benhamou Jaouad,
Jami Mohammed,
Mezrhab Ahmed,
Botton Valéry,
Henry Daniel
Publication year - 2020
Publication title -
heat transfer
Language(s) - English
Resource type - Journals
eISSN - 2688-4542
pISSN - 2688-4534
DOI - 10.1002/htj.21800
Subject(s) - lattice boltzmann methods , natural convection , rayleigh wave , acoustic wave , rayleigh number , acoustics , rayleigh scattering , convection , physics , enclosure , mechanics , thermal , wave propagation , optics , meteorology , computer science , telecommunications
In this paper, the lattice Boltzmann method is used to study the acoustic waves propagation inside a differentially heated square enclosure filled with air. The waves are generated by a point sound source located at the center of this cavity. The main aim of this simulation is to simulate the interaction between the thermal convection and the propagation of these acoustic waves. The results have been validated with those obtained in the literature and show that the effect of natural convection on the acoustic waves propagation is almost negligible for low Rayleigh numbers ( Ra ≤ 10 4 ), which begins to appear when the Rayleigh number begins to become important ( Ra ≥ 10 5 ) and it becomes considerable for large Rayleigh numbers ( Ra ≥ 10 6 ) where the thermal convection is important.