ORCID Profile
0000-0001-9627-5903
Current Organisations
KTH Royal Institute of Technology
,
Friedrich-Alexander-Universität Erlangen-Nürnberg
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Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Date: 02-2020
DOI: 10.2514/1.J057765
Publisher: American Physical Society (APS)
Date: 25-04-2018
Publisher: AIP Publishing
Date: 03-2021
DOI: 10.1063/5.0043984
Abstract: A computational study based on well-resolved large-eddy simulations is performed to study the skin friction modification by a large-eddy breakup device (LEBU) in a zero-pressure-gradient turbulent boundary layer. The LEBU was modeled using an immersed boundary method. It is observed that the presence of the device leads to the generation of wake vortices, which propagate downstream from the LEBU and toward the wall. A skin friction decomposition procedure is utilized to study different physical mechanisms of the observed skin friction reduction. From the skin friction decomposition, it is found that the skin friction reduction can be characterized by three universal regions of different changes for the skin friction contributions. The first region is predominantly associated with the formation of the wake vortices and the reduction of Reynolds shear stress. In the second region, the mean streamwise velocity fields show that a region of velocity deficit formed downstream of the LEBU propagates toward the wall and leads to turbulence reduction due to wake wall interactions, which also induces a local maximum skin friction reduction. In the third region, the dissipation of wake vortices leads to the regeneration of Reynolds shear stress. A quadrant analysis of the Reynolds shear stress contribution reveals that the LEBU increases the Q2 and Q4 contributions and attenuates the Q1 and Q3 contributions in the first region, followed by an onset of Reynolds shear stress further downstream.
Publisher: American Physical Society (APS)
Date: 15-03-2022
Publisher: Elsevier BV
Date: 12-2020
Publisher: Springer Science and Business Media LLC
Date: 12-03-2016
Publisher: Springer Science and Business Media LLC
Date: 11-08-2016
Publisher: American Physical Society (APS)
Date: 27-12-2016
Publisher: Springer Science and Business Media LLC
Date: 18-10-2017
Publisher: American Physical Society (APS)
Date: 30-07-2020
Publisher: Cambridge University Press (CUP)
Date: 28-06-2021
DOI: 10.1017/JFM.2021.504
Publisher: IOP Publishing
Date: 04-2018
Publisher: Elsevier BV
Date: 12-2019
Location: No location found
No related grants have been discovered for Philipp Schlatter.