Conditional statistics of temperature fluctuations in turbulent convection

Emily S. C. Ching, K. L. Chau
2001 Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics  
We find that the conditional statistics of temperature difference at fixed values of the locally averaged temperature dissipation rate in turbulent convection become Gaussian in the regime where the mixing dynamics is expected to be driven by buoyancy. Hence, intermittency of the temperature fluctuations in this buoyancy-driven regime can be solely attributed to the variation of the locally averaged temperature dissipation rate. We further obtain the functional behavior of these conditional
more » ... erature structure functions. This functional form demonstrates explicitly the failure of dimensional agruments and enhances the understanding of the temperature structure functions.
doi:10.1103/physreve.63.047303 pmid:11308985 fatcat:ocjpx3d2kvemxftwqhhnzxnb7m