TY - GEN
T1 - Influence of upstream perturbations on wall heat transfer via large-scale motions
AU - Pulletikurthi, Venkatesh
AU - Dharmarathne, Suranga
AU - Hussain, Fazle
AU - Castillo, Luciano
N1 - Publisher Copyright:
© 2019, This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply.
PY - 2019
Y1 - 2019
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85072818789&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-22196-6_16
DO - 10.1007/978-3-030-22196-6_16
M3 - Conference contribution
AN - SCOPUS:85072818789
SN - 9783030221959
T3 - Springer Proceedings in Physics
SP - 99
EP - 104
BT - Progress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018
A2 - Örlü, Ramis
A2 - Talamelli, Alessandro
A2 - Peinke, Joachim
A2 - Oberlack, Martin
PB - Springer Science and Business Media, LLC
T2 - 8th iTi Conference on Turbulence, 2018
Y2 - 3 September 2018 through 7 September 2018
ER -