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

Venkatesh Pulletikurthi; Suranga Dharmarathne; Fazle Hussain; Luciano Castillo

doi:10.1007/978-3-030-22196-6_16

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

Venkatesh Pulletikurthi, Suranga Dharmarathne, Fazle Hussain, Luciano Castillo

Houston Methodist

Research output: Chapter in Book/Report/Conference proceeding › Conference 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, Re_τ = 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 language	English (US)
Title of host publication	Progress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018
Editors	Ramis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack
Publisher	Springer Science and Business Media, LLC
Pages	99-104
Number of pages	6
ISBN (Print)	9783030221959
DOIs	https://doi.org/10.1007/978-3-030-22196-6_16
State	Published - 2019
Event	8th iTi Conference on Turbulence, 2018 - Bertinoro, Italy Duration: Sep 3 2018 → Sep 7 2018

Publication series

Name	Springer Proceedings in Physics
Volume	226
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Other

Other	8th iTi Conference on Turbulence, 2018
Country/Territory	Italy
City	Bertinoro
Period	9/3/18 → 9/7/18

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1007/978-3-030-22196-6_16

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

Influence of upstream perturbations on wall heat transfer via large-scale motions. / Pulletikurthi, Venkatesh; Dharmarathne, Suranga; Hussain, Fazle et al.
Progress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018. ed. / Ramis Örlü; Alessandro Talamelli; Joachim Peinke; Martin Oberlack. Springer Science and Business Media, LLC, 2019. p. 99-104 (Springer Proceedings in Physics; Vol. 226).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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. Springer Proceedings in Physics, vol. 226, Springer Science and Business Media, LLC, pp. 99-104, 8th iTi Conference on Turbulence, 2018, Bertinoro, Italy, 9/3/18. https://doi.org/10.1007/978-3-030-22196-6_16

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

Pulletikurthi, Venkatesh ; Dharmarathne, Suranga ; Hussain, Fazle et al. / Influence of upstream perturbations on wall heat transfer via large-scale motions. Progress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018. editor / Ramis Örlü ; Alessandro Talamelli ; Joachim Peinke ; Martin Oberlack. Springer Science and Business Media, LLC, 2019. pp. 99-104 (Springer Proceedings in Physics).

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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.",

author = "Venkatesh Pulletikurthi and Suranga Dharmarathne and Fazle Hussain and Luciano Castillo",

note = "Funding Information: We thank Dr. Stefano Leonardi at UT-Dallas for allowing us to use his channel flow code for this project. We acknowledge the funding provided by National Science Foundation through grant NSF-CBET-ONR:1512393: International Collaboration: The role of initial conditions on LSMs/VLSMs in turbulent boundary layers. Publisher Copyright: {\textcopyright} 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.; 8th iTi Conference on Turbulence, 2018 ; Conference date: 03-09-2018 Through 07-09-2018",

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N1 - Funding Information: We thank Dr. Stefano Leonardi at UT-Dallas for allowing us to use his channel flow code for this project. We acknowledge the funding provided by National Science Foundation through grant NSF-CBET-ONR:1512393: International Collaboration: The role of initial conditions on LSMs/VLSMs in turbulent boundary layers. Publisher Copyright: © 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.

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AB - 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.

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

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