Scaling properties of the equation for passive scalar transport in wall-bounded turbulent flows
S Saha, JC Klewicki, ASH Ooi, HM Blackburn, T Wei
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2014
Data from direct numerical simulations (DNS) of fully-developed turbulent channel flows subjected to a constant surface heat-flux are used to explore the scaling behaviours admitted by the mean thermal energy equation. Following the framework of Wei et al. (2005) [1,2], the analysis employs a theory based on the magnitude ordering of terms in the mean thermal energy equation of wall-bounded turbulent heat transfer. A four layer thermal structure has been identified from the leading order terms in the mean energy equation. A review of the limitations of traditional and existing scaling of mean temperature and turbulent heat flux is conducted. The possibilities of a new scaling approach with t..View full abstract
The authors gratefully acknowledge the financial support of the Australian Research Council and the computational resources provided by a Victorian Life Sciences Computation Initiative (VLSCI) grant on its Peak Computing Facility at the University of Melbourne, an initiative of the Victorian Government. We wish to thank Dr. H. Abe for providing us turbulent heat transfer data (Re<INF>tau</INF> = 1020, Pr = 0.025).