Influence of upstream perturbations on wall heat transfer via large-scale motions

Venkatesh Pulletikurthi, Suranga Dharmarathne, Fazle Hussain, Luciano Castillo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose a new method to separate the energetic large-scale motions (LSM) and small-scale motions (SSM) using proper orthogonal decomposition (POD) in a turbulent channel flow with spanwise jets for a frictional Reynolds number, Reτ = 394. The results show that the upstream perturbations enhance streamwise heat flux via energetic LSM and also create a secondary peak of scalar production in the log-layer showing that the perturbations alter LSMs to enhance the heat transfer.

Original languageEnglish
Title of host publicationProgress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018
EditorsRamis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack
PublisherSpringer Science and Business Media, LLC
Pages99-104
Number of pages6
ISBN (Print)9783030221959
DOIs
StatePublished - 2019
Event8th iTi Conference on Turbulence, 2018 - Bertinoro, Italy
Duration: Sep 3 2018Sep 7 2018

Publication series

NameSpringer Proceedings in Physics
Volume226
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference8th iTi Conference on Turbulence, 2018
CountryItaly
CityBertinoro
Period09/3/1809/7/18

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  • Cite this

    Pulletikurthi, V., Dharmarathne, S., Hussain, F., & Castillo, L. (2019). Influence of upstream perturbations on wall heat transfer via large-scale motions. In R. Örlü, A. Talamelli, J. Peinke, & M. Oberlack (Eds.), Progress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018 (pp. 99-104). (Springer Proceedings in Physics; Vol. 226). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-030-22196-6_16