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Numerical Study of Mixed Convection Flows around Large-Scale Heat Sinks: Application to Data Center Cooling

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Abstract:

In this work, we present a numerical study of mixed convection flows around large-scale heat sinks. It is based on the Cascade Lattice Boltzmann Method (LBM) for values of the Rayleigh number, in transitional regime, in the range 5×107≤Ra≤5×108 and for a Reynolds value fixed at Re=1000. The study is carried out in a rectangular cavity of dimension H subjected to periodic thermal and dynamic boundary conditions on its vertical walls. Two heat sources of (L', l', H/2) with a hot temperature Th, are placed on the bottom wall of the cavity to simulate heat sinks. Fresh air (for cooling these heat sinks) is injected at a temperature Tc< Th from the bottom of the cavity through two openings of length L''. The hot air is extracted through an opening (2L'' long) managed on the upper horizontal wall. The preliminary results, presented in this paper, are in the form of streamlines, isotherms and thermal profiles in the range of the Rayleigh number considered. Heat transfer is studied in terms of the average Nusselt number calculated over the entire surface of the two heat sources.

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Periodical:

Defect and Diffusion Forum (Volume 449)

Pages:

37-46

DOI:

https://doi.org/10.4028/p-rQ94u2

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Online since:

March 2026

Authors:

Fatima Zahra Laktaoui Amine*, Mustapha El Alami, Elalami Semma

Keywords:

Data Centre Cooling, Heat Sink, Large Scale, LBM, Mixed Convection

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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