Active Control of Turbulent Convective Heat Transfer with Plasma Actuators

Rodrigo Castellanos*, Theodoros Michelis, Stefano Discetti, Andrea Ianiro, Marios Kotsonis

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


We study an array of streamwise-oriented Dielectric Barrier Discharge (DBD) plasma actuators as an active control technique in turbulent flows. The analysis aims at elucidating the mechanism of interaction between the structures induced by the DBD-plasma actuators and the convective heat transfer process in a fully developed turbulent boundary layer. The employed flush-mounted DBD-plasma actuator array generates pairs of counter-rotating, stationary, streamwise vortices. The full three-dimensional, velocity field is measured with stereoscopic PIV and convective heat transfer at the wall is assessed by infrared thermography. The plasma actuator forcing diverts the main flow, yielding a low-momentum region that grows in the streamwise direction. The suction effect promoted on top of the exposed electrodes confines the vortices in the spanwise direction. Eventually, the pair of streamwise vortices locally reduces the convective heat transfer with a persistence of several outer lengthscales downstream of the actuation.

Original languageEnglish
Title of host publicationProgress in Turbulence IX - Proceedings of the iTi Conference in Turbulence, 2021
EditorsRamis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack
PublisherSpringer Science+Business Media
Number of pages7
ISBN (Print)9783030807153
Publication statusPublished - 2021
Event9th iTi Conference on Turbulence, iTi 2021 - Virtual, Online
Duration: 25 Feb 202126 Feb 2021

Publication series

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


Conference9th iTi Conference on Turbulence, iTi 2021
CityVirtual, Online


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