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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

INVESTIGATION OF THE BOUNDARY LAYERS IN TURBULENT RAYLEIGH-BENARD CONVECTION

pages 177-182
DOI: 10.1615/TSFP6.280
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RÉSUMÉ

In the present study the temperature profiles of turbulent Rayleigh-Bénard convection obtained through DNS and microthermistor measurements in a rectangular container are compared. It is found that both DNS and experimental data are in good agreement when comparing temperature profiles at topologically similar flow positions. It is observed that the data sets obtained at Ra ~ 108 are in significantly better agreement than at Ra ~ 107. Finally, our results are compared to the analytical fit function proposed by Shishkina & Thess (2009) and find that this function gives a very good representation of the DNS data when the temperature profiles through the centre of the roll structures are evaluated.

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