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ISSN 961-91393-0-5
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 Year 1997
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733 pages
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Volume price - $130.00
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Direct numerical simulation of natural convection between two infinite, differentially heated, vertical walls
T. A. M. Versteegh
J.M. Burgers Centre, Delft University of Technology, Rotterdamseweg 145, 2628 AL Delft, The Netherlands
F. T. M. Nieuwstadt
J.M. Burgers Centre, Delft University of Technology, Rotterdamseweg 145, 2628 AL Delft, The Netherlands
ABSTRACT
A Direct Numerical Simulation of natural convection flow in an infinite, differentially heated, vertical channel has been performed at four Rayleigh numbers varying from 5.4 × 105 to 5.0 × 106 for Pr = 0.709. The attention will be focused on the turbulent Reynolds-stresses and their budgets. We will interpret the budgets in terms of the physical processes that determine this flow. In addition, we have calculated the stresses and budgets based on the structures found from linear stability analysis of the laminar solution of this problem. Last mentioned budgets will be compared with the budgets for fully developed turbulent flow, in order to estimate the influence of the large scale coherent structures on the budgets.
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