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3-d Measurements of the Velocity in the Boundary Layer of Turbulent Convection

  • L. Li
  • R. du Puits
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

In our contribution we present local velocity measurements inside the boundary layers in turbulent Rayleigh-Bénard convection. The experiments were conducted at a Rayleigh number Ra = 2.88 × 1010 a Prandtl number Pr = 0.7 and an aspect ratio Γ = 1. The goal of this work was to create a set of reference data to compare it with recently performed numerical simulations at the same parameter range. Our measurements have shown that the profile of themean horizontal velocity differs from the prediction of a laminar isothermal boundary layer and that thermal plumes create a significant wall-normal component of the velocity.

Keywords

Boundary Layer Rayleigh Number Horizontal Velocity Laser Doppler Anemometry Turbulent Convection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Institute of Thermodynamics and Fluid MechanicsIlmenau University of TechnologyIlmenauGermany

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