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Benchmark solutions for natural convection flows in vertical channels submitted to different open boundary conditions
- Source :
- International Journal of Thermal Sciences, International Journal of Thermal Sciences, Elsevier, 2013, 72, pp.18-33. ⟨10.1016/j.ijthermalsci.2013.05.003⟩
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- International audience; 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.
- Subjects :
- Natural convection
Meteorology
020209 energy
General Engineering
02 engineering and technology
Mechanics
Condensed Matter Physics
01 natural sciences
Nusselt number
010305 fluids & plasmas
Physics::Fluid Dynamics
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
Fluid dynamics
[SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]
[PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph]
Boundary value problem
Sensitivity (control systems)
Geology
Communication channel
Return flow
Dimensionless quantity
Subjects
Details
- Language :
- English
- ISSN :
- 12900729
- Database :
- OpenAIRE
- Journal :
- International Journal of Thermal Sciences, International Journal of Thermal Sciences, Elsevier, 2013, 72, pp.18-33. ⟨10.1016/j.ijthermalsci.2013.05.003⟩
- Accession number :
- edsair.doi.dedup.....e9a8762b519479d36223ee1928b60574