<div class="csl-bib-body">
<div class="csl-entry">Giamagas, G., Zonta, F., Roccon, A., & Soldati, A. (2022, November 22). <i>Turbulent Poiseuille flow of two immiscible liquid layers inside a channel</i> [Conference Presentation]. 75th Annual Meeting of the APS Division of Fluid Dynamics (APS-DFD 2022), Indianapolis, United States of America (the).</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/193584
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dc.description.abstract
We use pseudo-spectral Direct Numerical Simulation (DNS), coupled with a Phase Field Method (PFM), to investigate the turbulent Poiseuille flow of two immiscible liquid layers inside a channel. The two liquid layers, which have the same thickness (h1=h2=h), are characterized by the same density (ρ1=ρ2=ρ) but different viscosities (μ1 ≠ μ2). The full problem is described in terms of the following flow parameters: the shear Reynolds number (Reτ, which quantifies the importance of inertia compared to viscous effects), the Weber number (We, which quantifies surface tension effects compared to inertia) and the viscosity ratio, λ between the two fluids. In particular, we fix Reτ=300, We=1, and we consider viscosity ratios in the range 0.1≤ λ=μ1/μ2 ≤ 1. We focus on the role of turbulence in initially deforming the interface and on the subsequent growth of capillary waves. Compared to a single phase flow at the same shear Reynolds number (Reτ=300), in the two-layers case we observe a strong interaction between the turbulent flow and the deformable liquid-liquid interface. A full characterization of the interface deformation, in terms of spatiotemporal specta of wave elevation will be presented and discussed.
en
dc.language.iso
en
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dc.subject
turbulence
en
dc.subject
multiphase flow
en
dc.subject
deformable interface
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dc.subject
phase field method
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dc.subject
direct numerical simulation
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dc.title
Turbulent Poiseuille flow of two immiscible liquid layers inside a channel
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchTopic.id
C2
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tuw.researchTopic.name
Computational Fluid Dynamics
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E322 - Institut für Strömungsmechanik und Wärmeübertragung
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tuw.publication.orgunit
E322-01 - Forschungsbereich Strömungsmechanik
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tuw.event.name
75th Annual Meeting of the APS Division of Fluid Dynamics (APS-DFD 2022)
en
tuw.event.startdate
20-11-2022
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tuw.event.enddate
22-11-2022
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Indianapolis
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tuw.event.country
US
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tuw.event.presenter
Giamagas, Georgios
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wb.sciencebranch
Maschinenbau
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch
Mathematik
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wb.sciencebranch.oefos
2030
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.oefos
1010
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wb.sciencebranch.value
50
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wb.sciencebranch.value
40
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wb.sciencebranch.value
10
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item.languageiso639-1
en
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item.openairetype
conference paper not in proceedings
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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crisitem.author.dept
E322-01 - Forschungsbereich Strömungsmechanik
-
crisitem.author.dept
E322-01 - Forschungsbereich Strömungsmechanik
-
crisitem.author.dept
E322-01 - Forschungsbereich Strömungsmechanik
-
crisitem.author.dept
E322 - Institut für Strömungsmechanik und Wärmeübertragung
-
crisitem.author.parentorg
E322 - Institut für Strömungsmechanik und Wärmeübertragung
-
crisitem.author.parentorg
E322 - Institut für Strömungsmechanik und Wärmeübertragung
-
crisitem.author.parentorg
E322 - Institut für Strömungsmechanik und Wärmeübertragung
-
crisitem.author.parentorg
E300 - Fakultät für Maschinenwesen und Betriebswissenschaften
