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Influence of Surface Topography on Heat Transfer in Shear-Driven Liquid Films

Budakli, Mete ; Gambaryan-Roisman, Tatiana ; Stephan, Peter (2024)
Influence of Surface Topography on Heat Transfer in Shear-Driven Liquid Films.
In: Journal of Physics: Conference Series, 2012, 395 (1)
doi: 10.26083/tuprints-00020794
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Influence of Surface Topography on Heat Transfer in Shear-Driven Liquid Films
Language: English
Date: 6 February 2024
Place of Publication: Darmstadt
Year of primary publication: 2012
Place of primary publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 395
Issue Number: 1
Collation: 9 Seiten
DOI: 10.26083/tuprints-00020794
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Thin gas-driven liquid films find numerous industrial applications. They are used for fuel preparation in airblast atomizers of modern gas turbines. Strong shear forces at the gas-liquid interface destabilize the liquid-gas interface and lead to development of interfacial waves. In this study, the heat transfer in liquid films driven by turbulent gas flow is investigated experimentally over a wide range of parameters. A liquid film is formed on vertical heated unstructured and micro-structured tubes. The Reynolds number of the gas flow is varied between 10⁴ and 10⁵, and the Reynolds number of the liquid film flow is varied between 80 and 800. Wall heat fluxes up to 30 W/cm² are applied. The heat transfer coefficient strongly depends on the gas and liquid Reynolds numbers. Using the micro-structured tube leads to a heat transfer enhancement of up to 80 %.

Identification Number: Artikel-ID: 012164
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-207945
Additional Information:

6th European Thermal Sciences Conference (Eurotherm 2012) 4–7 September 2012, Poitiers, France

Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Date Deposited: 06 Feb 2024 10:34
Last Modified: 30 Apr 2024 11:55
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20794
PPN: 517437090
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