LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures

Thomas Kaller; Stefan Hickel; Nikolaus A. Adams

doi:10.2514/6.2018-4287

LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures

Thomas Kaller, Stefan Hickel, Nikolaus A. Adams

Aerodynamics

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

2 Citations (Scopus)

50 Downloads (Pure)

Abstract

We present the results of well-resolved large-eddy simulations (LES) of an asymmetrically heated high aspect ratio cooling duct (HARCD) with an aspect ratio of AR = 4.3 for two different wall temperatures. The temperature difference with respect to the bulk flow is ∆T = 40 K, respectively ∆T = 60 K. The HARCD is operated with liquid water at a Reynolds number of Re_b = 110 ⋅ 10³ based on bulk velocity and hydraulic diameter. The generic HARCD setup follows a reference experiment. The main goal of the present study is the numerical investigation of the interaction of turbulent heat transfer and the turbulent duct flow, specifically the heating induced changes in mean flow and turbulent statistics with a spatially developing temperature boundary layer. Furthermore, we investigate the influence of asymmetric wall heating on streamwise vorticity and its dynamics as well as the turbulent Prandtl number and the effect of the secondary flow on its distribution.

Original language	English
Title of host publication	2018 Joint Thermophysics and Heat Transfer Conference
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages	17
ISBN (Electronic)	9781624105524
DOIs	https://doi.org/10.2514/6.2018-4287
Publication status	Published - 1 Jan 2018
Event	12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018 - [state] GA, United States Duration: 25 Jun 2018 → 29 Jun 2018

Conference

Conference	12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018
Country/Territory	United States
City	[state] GA
Period	25/06/18 → 29/06/18

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title = "LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures",

abstract = "We present the results of well-resolved large-eddy simulations (LES) of an asymmetrically heated high aspect ratio cooling duct (HARCD) with an aspect ratio of AR = 4.3 for two different wall temperatures. The temperature difference with respect to the bulk flow is ∆T = 40 K, respectively ∆T = 60 K. The HARCD is operated with liquid water at a Reynolds number of Reb = 110 ⋅ 103 based on bulk velocity and hydraulic diameter. The generic HARCD setup follows a reference experiment. The main goal of the present study is the numerical investigation of the interaction of turbulent heat transfer and the turbulent duct flow, specifically the heating induced changes in mean flow and turbulent statistics with a spatially developing temperature boundary layer. Furthermore, we investigate the influence of asymmetric wall heating on streamwise vorticity and its dynamics as well as the turbulent Prandtl number and the effect of the secondary flow on its distribution.",

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note = "12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018 ; Conference date: 25-06-2018 Through 29-06-2018",

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Kaller, T, Hickel, S & Adams, NA 2018, LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures. in 2018 Joint Thermophysics and Heat Transfer Conference., AIAA 2018-4287, American Institute of Aeronautics and Astronautics Inc. (AIAA), 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018, [state] GA, United States, 25/06/18. https://doi.org/10.2514/6.2018-4287

LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures. / Kaller, Thomas; Hickel, Stefan; Adams, Nikolaus A.
2018 Joint Thermophysics and Heat Transfer Conference. American Institute of Aeronautics and Astronautics Inc. (AIAA), 2018. AIAA 2018-4287.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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T1 - LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures

AU - Kaller, Thomas

AU - Hickel, Stefan

AU - Adams, Nikolaus A.

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N2 - We present the results of well-resolved large-eddy simulations (LES) of an asymmetrically heated high aspect ratio cooling duct (HARCD) with an aspect ratio of AR = 4.3 for two different wall temperatures. The temperature difference with respect to the bulk flow is ∆T = 40 K, respectively ∆T = 60 K. The HARCD is operated with liquid water at a Reynolds number of Reb = 110 ⋅ 103 based on bulk velocity and hydraulic diameter. The generic HARCD setup follows a reference experiment. The main goal of the present study is the numerical investigation of the interaction of turbulent heat transfer and the turbulent duct flow, specifically the heating induced changes in mean flow and turbulent statistics with a spatially developing temperature boundary layer. Furthermore, we investigate the influence of asymmetric wall heating on streamwise vorticity and its dynamics as well as the turbulent Prandtl number and the effect of the secondary flow on its distribution.

AB - We present the results of well-resolved large-eddy simulations (LES) of an asymmetrically heated high aspect ratio cooling duct (HARCD) with an aspect ratio of AR = 4.3 for two different wall temperatures. The temperature difference with respect to the bulk flow is ∆T = 40 K, respectively ∆T = 60 K. The HARCD is operated with liquid water at a Reynolds number of Reb = 110 ⋅ 103 based on bulk velocity and hydraulic diameter. The generic HARCD setup follows a reference experiment. The main goal of the present study is the numerical investigation of the interaction of turbulent heat transfer and the turbulent duct flow, specifically the heating induced changes in mean flow and turbulent statistics with a spatially developing temperature boundary layer. Furthermore, we investigate the influence of asymmetric wall heating on streamwise vorticity and its dynamics as well as the turbulent Prandtl number and the effect of the secondary flow on its distribution.

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M3 - Conference contribution

BT - 2018 Joint Thermophysics and Heat Transfer Conference

PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)

T2 - 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018

Y2 - 25 June 2018 through 29 June 2018

ER -

LES of an asymmetrically heated high aspect ratio duct at high reynolds number at different wall temperatures

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