Benchmark solutions for natural convection flows in vertical channels submitted to different open boundary conditions

G. Desrayaud; Eric Chénier; A. Joulin; Alain Bastide; Boris Brangeon; J.P. Caltagirone; Y. Cherif; R. Eymard; C. Garnier; S. Giroux-Julien; Y. Harmane; P. Joubert; N. Laaroussi; S. Lassue; P. Le Quere; R. Li; D. Saury; A. Sergent; S. Xin; A. Zoubir

Benchmark solutions for natural convection flows in vertical channels submitted to different open boundary conditions

G. Desrayaud ¹ Eric Chénier ² A. Joulin ³ Alain Bastide ⁴ Boris Brangeon ⁴ J.P. Caltagirone ⁵ Y. Cherif ³ R. Eymard ⁶ C. Garnier ⁷ S. Giroux-Julien ⁸ Y. Harmane ⁹ P. Joubert ¹⁰ N. Laaroussi ¹¹ S. Lassue ³ P. Le Quere ⁷ R. Li ¹ D. Saury ⁹ A. Sergent ⁷ S. Xin ⁸ A. Zoubir ⁸

1 MSME - Laboratoire de Modélisation et Simulation Multi Echelle

2 TCM

MSME - Laboratoire de Modélisation et Simulation Multi Echelle

3 LGCgE - Laboratoire Génie Civil et Géo-Environnement [Béthune]

4 PIMENT - Physique et Ingénierie Mathématique pour l'Énergie, l'environnemeNt et le bâtimenT

5 TREFLE - Transferts, écoulements, fluides, énergétique

6 LAMA - Laboratoire d'Analyse et de Mathématiques Appliquées

7 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur

8 CETHIL - Centre de Thermique de Lyon

9 PPRIME - Institut Pprime

10 LaSIE - Laboratoire des Sciences de l'Ingénieur pour l'Environnement

11 LEME - Laboratoire d'Energétique, Matériaux et Environnement

Abstract : Comparison exercises have been carried out by different research teams to study the sensitivity of the natural convection occurring in a vertical asymmetrically heated channel to four sets of open boundary conditions. The dimensionless parameters have been chosen so that a return flow exists at the outlet. On the whole, results provided by the partners are in good agreement; benchmark solutions are then defined for each of the boundary conditions. Whilst the local and average Nusselt numbers based on the entrance temperature do not depend much on conditions applied in the aperture sections, the net fluid flow rates crossing the channel and the characteristics of the recirculation cells are highly influenced. But we proved that these modifications of flow patterns do not alter significantly the fluid flow rates leaving the channel through the exit section.

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Mechanics [physics.med-ph] / Thermics [physics.class-ph]

Physics [physics] / Mechanics [physics] / Thermics [physics.class-ph]

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Benchmark solutions for natural convection flows in vertical channels submitted to different open boundary conditions

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