Pré-Publication, Document De Travail Année : 2025

Influence of wind on heat transfer in turbulent convection with roughness

Influence de la circulation à grande échelle sur le transfert de chaleur en convection turbulente rugueuse

Résumé

Direct 3D numerical simulations are carried out in periodic and confined Rayleigh-Bénard cases for a Rayleigh number equal to 10 10 . The lower plate is either smooth or rough. Periodic domains aim to reproduce the small structures of the cavity core without the wind-induced shear of the large-scale circulation. A comparison of confined and periodic cases highlights the effect of wind. It is shown that in the smooth case, heat transfer is independent of the wind presence. Contrary to the common hypothesis, the increase in heat transfer due to roughness is only partly based on wind-roughness interactions, and only when roughness emerges above the thermal and viscous boundary layers.
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Dates et versions

hal-04928422 , version 1 (04-02-2025)

Identifiants

  • HAL Id : hal-04928422 , version 1

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Nathan Carbonneau, Julien Salort, Yann Fraigneau, Anne Sergent. Influence of wind on heat transfer in turbulent convection with roughness. 2025. ⟨hal-04928422⟩
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