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Reynolds number and humidity dependency of dropwise condensation in moist convective air flows

Westhoff, Andreas and Niehaus, Konstantin A. and Volk, Marie-Christine and Wagner, Claus (2023) Reynolds number and humidity dependency of dropwise condensation in moist convective air flows. In: 21. STAB-Workshop - Jahresbericht 2023, pp. 40-41. 21. STAB - Workshop 2023, 2023-11-07 - 2023-11-08, Göttingen, Deutschland.

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Official URL: https://www.dlr.de/as/Portaldata/5/Resources/dokumente/veranstaltungen/stab_workshop/Jahresbericht2023.pdf


In moist air flows with phase transition is the convective flow strongly influenced by the sensible and the latent heat transfer. Additionally, the droplet shape (contact angle), the surface properties and the spatial distribution of the droplets also have a strong influence. Hence, empirical models or numerical calculations often fail to predict the heat and mass transfer due to the large number of parameters and the mutual interplay of the different heat transport mechanisms. To obtain a reliable prediction of the mass and the heat transfer, time-consuming and cost-intensive experiments or computationally expensive numerical simulations are necessary. Neither is feasible in the development and design process for industrial applications. It would be too costly and time consuming. Therefore, the method of predicting the droplet size distribution and the corresponding heat transfer by means of a scalar model is of vital interest. To overcome this issue we have been developing a prediction model based on the scaling of system characteristic numbers. Part of this approach is to investigate the effect of large-scale flow structures on the dynamics of the droplet size distribution and the corresponding sensible heat transfer and the condensation mass transfer

Item URL in elib:https://elib.dlr.de/197648/
Document Type:Conference or Workshop Item (Speech)
Title:Reynolds number and humidity dependency of dropwise condensation in moist convective air flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Westhoff, AndreasUNSPECIFIEDhttps://orcid.org/0009-0008-7242-2970UNSPECIFIED
Niehaus, Konstantin A.UNSPECIFIEDhttps://orcid.org/0000-0001-7083-7998UNSPECIFIED
Volk, Marie-ChristineUNSPECIFIEDhttps://orcid.org/0009-0003-8963-2724148186477
Wagner, ClausUNSPECIFIEDhttps://orcid.org/0000-0003-2273-0568UNSPECIFIED
Date:November 2023
Journal or Publication Title:21. STAB-Workshop - Jahresbericht 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 40-41
EditorsEmailEditor's ORCID iDORCID Put Code
Series Name:Jahresbericht
Keywords:moist air, convection, phase transition, heat transfer, droplet condensation
Event Title:21. STAB - Workshop 2023
Event Location:Göttingen, Deutschland
Event Type:Workshop
Event Start Date:7 November 2023
Event End Date:8 November 2023
Organizer:DLR, STAB
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Westhoff, Andreas
Deposited On:06 Dec 2023 15:00
Last Modified:24 Apr 2024 20:57

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