Bahavar, Philipp and Wagner, Claus (2020) Condensation-induced flow structure modifications in turbulent channel flow investigated in direct numerical simulations. Physics of Fluids, 32 (015115), pp. 1-12. American Institute of Physics (AIP). doi: 10.1063/1.5128976. ISSN 1070-6631.
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Official URL: https://aip.scitation.org/doi/10.1063/1.5128976
Abstract
Turbulent flow of a fluid carrying trace amounts of a condensable species through a differentially cooled vertical channel geometry is simulated using single-phase direct numerical simulations. The release of latent heat during condensation is modeled by interdependent temperature and vapor concentration source terms governing the relation between the removal of excess vapor from the system and the associated local increase of fluid temperature. A coupling between condensation and turbulence is implemented via solutal and thermal buoyancy. By comparisons to simulations of an identical system without phase transition modeling, the modifications of the subcooled boundary layer due to the transient and highly localized release of latent heat could be observed. Separate analysis of fluid before and after phase transition events shows a clear increase in post-interaction streak spacing, with the release of latent heat during condensation events opposing the cooling effect of the channel wall and the associated damping of turbulence.
Item URL in elib: | https://elib.dlr.de/128994/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Additional Information: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Physics of Fluids 32, 015115 (2020) and may be found at https://aip.scitation.org/doi/10.1063/1.5128976 | ||||||||||||
Title: | Condensation-induced flow structure modifications in turbulent channel flow investigated in direct numerical simulations | ||||||||||||
Authors: |
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Date: | 23 January 2020 | ||||||||||||
Journal or Publication Title: | Physics of Fluids | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 32 | ||||||||||||
DOI: | 10.1063/1.5128976 | ||||||||||||
Page Range: | pp. 1-12 | ||||||||||||
Editors: |
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Publisher: | American Institute of Physics (AIP) | ||||||||||||
ISSN: | 1070-6631 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | turbulent channel flow, condensation, latent heat, buoyancy | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Transport | ||||||||||||
HGF - Program Themes: | Rail Transport | ||||||||||||
DLR - Research area: | Transport | ||||||||||||
DLR - Program: | V SC Schienenverkehr | ||||||||||||
DLR - Research theme (Project): | V - NGT BIT (old) | ||||||||||||
Location: | Göttingen | ||||||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Ground Vehicles | ||||||||||||
Deposited By: | Bahavar, Philipp | ||||||||||||
Deposited On: | 19 Feb 2020 14:12 | ||||||||||||
Last Modified: | 24 Oct 2023 11:12 |
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