Benchmark solution for a three-dimensional mixed convection flow - Part 1: reference solutions
Langue
en
Article de revue
Ce document a été publié dans
Numerical Heat Transfer, Part B Fundamentals. 2011-10-28, vol. 60, n° 5, p. 325-345
Taylor & Francis
Résumé en anglais
Abstract A solution to a benchmark problem for a three-dimensional mixed convection flow in a horizontal rectangular channel heated from below and cooled from above (Poiseuille-Rayleigh-Bénard flow) is proposed. This flow ...Lire la suite >
Abstract A solution to a benchmark problem for a three-dimensional mixed convection flow in a horizontal rectangular channel heated from below and cooled from above (Poiseuille-Rayleigh-Bénard flow) is proposed. This flow is a steady thermoconvective longitudinal roll flow in a large aspect ratio channel at moderate Reynolds and Rayleigh numbers (Re=50, Ra=5000) and Prandtl number Pr=0.7. The model is based on the Navier-Stokes equations with Boussinesq approximation. We propose reference solutions resulting from computations on large grids, Richardson extrapolation (RE) and cubic spline interpolations. The solutions obtained with one finite difference, one finite volume and two finite element codes are in good agreement and reference values for the flow and thermal fields and the heat and momentum fluxes are given with 4 to 5 significant digits.< Réduire
Mots clés en anglais
Richardson extrapolation
Benchmark
mixed convection
Poiseuille-Rayleigh-Bénard
reference solution
boundary conditions
singularity
convergence order
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