Comparison of thermal scaling properties between turbulent pipe and channel flows via DNS

S Saha; JC Klewicki; ASH Ooi; HM Blackburn

Journal article

Comparison of thermal scaling properties between turbulent pipe and channel flows via DNS

S Saha, JC Klewicki, ASH Ooi, HM Blackburn

International Journal of Thermal Sciences | ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER | Published : 2015

DOI: 10.1016/j.ijthermalsci.2014.10.010

Abstract

A systematic comparison of thermal scaling properties of pipe and channel flows is presented. DNS data are used to compute thermal statistics for friction Reynolds numbers of 180 and 395 and Prandtl numbers ranging between 0.025 and 7. A distinct four layer regime for the thermal field is clearly identified in both channel and pipe flows. The analysis reveals that the balance breaking and exchange of leading order terms in the mean energy equation that occurs across an intermediate layer is similar to the exchange of terms in the mean momentum equation. The present analysis suggests that, at high Peclet numbers in the four layer regime, the scaling characteristics of the temperature field be..

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University of Melbourne Researchers

Joseph Klewicki Author

Andrew Ooi Author

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Grants

Awarded by Australian Research Council

Funding Acknowledgements

The authors gratefully acknowledge the financial support of the Australian Research Council (Grant No. DP120101467 and LP120100233) and the computational resources provided by a Victorian Life Sciences Computation Initiative (VLSCI) grant number VR0210 on its Peak Computing Facility at the University of Melbourne, an initiative of the Victorian Government, Australia.