Comptes Rendus
no. 5-6
Thermal vibrational convection in a two-phase stratified liquid
[Convection thermo-vibrationnelle d'un système liquide à deux phases stratifié]
Qingming Chang1  ; J. Iwan D. Alexander1
1 National Center for Space Exploration Research and Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
Comptes Rendus. Mécanique, Volume 335 (2007) no. 5-6, pp. 304-314.

La réponse d'un système liquide à deux phases stratifié sujet à une vibration parallèle avec un gradient de température imposé est analysée en utilisant une méthode hybride thermique lattice Boltzmann (HTLB). Les vibrations considérées correspondent aux translations sinusoïdales d'une cavité rigide à fréquence fixe. Les couches sont couplées thermiquement et mécaniquement. L'interaction entre la convection thermique causée par la gravité et les vibrations est étudiée. La capacité des vibrations à intensifier l'écoulement, le transfert de chaleur et la déformation de l'interface est étudiée. Pour la gamme des paramètres considérés, les résultats indiquent que l'effet du nombre vibratoire de Rayleigh et de la fréquence vibratoire sur un système liquide à deux phases et stratifié est très différent que son effet sur un système liquide à une phase. La comparaison de ces deux systèmes et discutée.

The response of a two-phase stratified liquid system subject to a vibration parallel to an imposed temperature gradient is analyzed using a hybrid thermal lattice Boltzmann method (HTLB). The vibrations considered correspond to sinusoidal translations of a rigid cavity at a fixed frequency. The layers are thermally and mechanically coupled. Interaction between gravity-induced and vibration-induced thermal convection is studied. The ability of the applied vibration to enhance the flow, heat transfer and interface distortion is investigated. For the range of conditions investigated, the results reveal that the effect of the vibrational Rayleigh number and vibrational frequency on a two-phase stratified fluid system is much different from that for a single-phase fluid system. Comparisons of the response of a two-phase stratified fluid system with a single-phase fluid system are discussed.

Publié le :
DOI : 10.1016/j.crme.2007.05.014
Keywords: Computational fluid mechanics, Thermal vibrational convection, Lattice Boltzmann, Interface
Mot clés : Mécanique des fluides numérique, Convection thermique-vibratoire, Lattice Boltzmann, Interface
Qingming Chang 1 ; J. Iwan D. Alexander 1

1 National Center for Space Exploration Research and Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA 
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Qingming Chang; J. Iwan D. Alexander. Thermal vibrational convection in a two-phase stratified liquid. Comptes Rendus. Mécanique, Volume 335 (2007) no. 5-6, pp. 304-314. doi : 10.1016/j.crme.2007.05.014. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2007.05.014/

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