INFLUENCE OF WALL SHEAR STRESS ON THE SECONDARY FLOW IN SQUARE DUCTS

Alexander Doehring; Thomas Kaller; Steffen J. Schmidt; Nikolaus A. Adams

INFLUENCE OF WALL SHEAR STRESS ON THE SECONDARY FLOW IN SQUARE DUCTS

Alexander Doehring, Thomas Kaller, Steffen J. Schmidt, Nikolaus A. Adams

Chair of Aerodynamics and Fluid mechanics

Technical University of Munich

Research output: Contribution to conference › Paper › peer-review

Abstract

We investigated turbulent duct flows with a square cross section using well-resolved large-eddy simulations (LES). A physically consistent subgrid-scale turbulence model is incorporated, that is based on the Adaptive Local Deconvolution Method (ALDM) for implicit LES. The wall shear stress is artificially modified at one of the four walls to mimic different surface properties. A direct numerical simulation (DNS) of a symmetrical duct flow is used as reference to asses the influence of a modified wall shear stress. The modification results in an asymmetrical distribution of the secondary flow source terms, affecting the momentum distribution. Further, the anisotropy of the Reynolds stress tensor, which induces the secondary flow vortices is considerably affected by the wall shear stress change.

Original language	English
State	Published - 2022
Event	12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022 - Osaka, Virtual, Japan Duration: 19 Jul 2022 → 22 Jul 2022

Conference

Conference	12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022
Country/Territory	Japan
City	Osaka, Virtual
Period	19/07/22 → 22/07/22

Cite this

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title = "INFLUENCE OF WALL SHEAR STRESS ON THE SECONDARY FLOW IN SQUARE DUCTS",

abstract = "We investigated turbulent duct flows with a square cross section using well-resolved large-eddy simulations (LES). A physically consistent subgrid-scale turbulence model is incorporated, that is based on the Adaptive Local Deconvolution Method (ALDM) for implicit LES. The wall shear stress is artificially modified at one of the four walls to mimic different surface properties. A direct numerical simulation (DNS) of a symmetrical duct flow is used as reference to asses the influence of a modified wall shear stress. The modification results in an asymmetrical distribution of the secondary flow source terms, affecting the momentum distribution. Further, the anisotropy of the Reynolds stress tensor, which induces the secondary flow vortices is considerably affected by the wall shear stress change.",

author = "Alexander Doehring and Thomas Kaller and Schmidt, {Steffen J.} and Adams, {Nikolaus A.}",

note = "Publisher Copyright: {\textcopyright} 2022 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022. All rights reserved.; 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022 ; Conference date: 19-07-2022 Through 22-07-2022",

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TY - CONF

T1 - INFLUENCE OF WALL SHEAR STRESS ON THE SECONDARY FLOW IN SQUARE DUCTS

AU - Doehring, Alexander

AU - Kaller, Thomas

AU - Schmidt, Steffen J.

AU - Adams, Nikolaus A.

PY - 2022

Y1 - 2022

N2 - We investigated turbulent duct flows with a square cross section using well-resolved large-eddy simulations (LES). A physically consistent subgrid-scale turbulence model is incorporated, that is based on the Adaptive Local Deconvolution Method (ALDM) for implicit LES. The wall shear stress is artificially modified at one of the four walls to mimic different surface properties. A direct numerical simulation (DNS) of a symmetrical duct flow is used as reference to asses the influence of a modified wall shear stress. The modification results in an asymmetrical distribution of the secondary flow source terms, affecting the momentum distribution. Further, the anisotropy of the Reynolds stress tensor, which induces the secondary flow vortices is considerably affected by the wall shear stress change.

AB - We investigated turbulent duct flows with a square cross section using well-resolved large-eddy simulations (LES). A physically consistent subgrid-scale turbulence model is incorporated, that is based on the Adaptive Local Deconvolution Method (ALDM) for implicit LES. The wall shear stress is artificially modified at one of the four walls to mimic different surface properties. A direct numerical simulation (DNS) of a symmetrical duct flow is used as reference to asses the influence of a modified wall shear stress. The modification results in an asymmetrical distribution of the secondary flow source terms, affecting the momentum distribution. Further, the anisotropy of the Reynolds stress tensor, which induces the secondary flow vortices is considerably affected by the wall shear stress change.

UR - http://www.scopus.com/inward/record.url?scp=85143818087&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85143818087

T2 - 12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022

Y2 - 19 July 2022 through 22 July 2022

ER -

INFLUENCE OF WALL SHEAR STRESS ON THE SECONDARY FLOW IN SQUARE DUCTS

Abstract

Conference

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