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High Velocity Impingement of Single Droplets on a Dry Smooth Surface

Faßmann, Benjamin W. and Bansmer, Stephan E. and Möller, Thorsten J. and Radespiel, Rolf and Hartmann, Michael (2013) High Velocity Impingement of Single Droplets on a Dry Smooth Surface. Experiments in Fluids, 54 (5), pp. 1-18. Springer. doi: 10.1007/s0034801315164. ISSN 0723-4864.

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Official URL: http://link.springer.com/article/10.1007/s00348-013-1516-4


The vertical impact of single, mono disperse water droplets on a dry smooth surface was studied experimentally by means of shadowgraphy. A glass substrate was mounted on a rotating wheel to obtain high impact velocities. The droplets were generated on demand. While the Ohnesorge number was kept constant, Weber number and Reynolds number were varied by adjusting the impact velocity. In all performed experiments, splashing was observed. The distinction of the different measurement series was done by the use of the Weber number. The different Weber numbers were, 3,500, 5,000 and 10,000. Phase-locked images were taken and the temporal evolution of the impact was reconstructed by means of the nondimensional impingement time. The outcome of the measurement was analysed by digital image processing to quantify the distribution of the diameter of the resulting secondary droplets in size and time as well as their velocity, and the total deposited mass fraction remaining on the surface after the impingement. In all cases, the greater part of the impinging primary droplet remained on the substrate.

Item URL in elib:https://elib.dlr.de/82311/
Document Type:Article
Additional Information:Article: 1516
Title:High Velocity Impingement of Single Droplets on a Dry Smooth Surface
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Faßmann, Benjamin W.benjamin.fassmann (at) dlr.deUNSPECIFIED
Bansmer, Stephan E.ISM, TU BraunschweigUNSPECIFIED
Möller, Thorsten J.ISM, TU BraunschweigUNSPECIFIED
Radespiel, RolfISM, TU BraunschweigUNSPECIFIED
Hartmann, MichaelVolkswagen AG, WolfsburgUNSPECIFIED
Date:May 2013
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s0034801315164
Page Range:pp. 1-18
Keywords:High Impact Velocity; High Weber Number; Droplet Impingement; Splashing; Secondary Droplet; Deposited Mass Fraction; Droplet Generation on Demand
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Faßmann, Benjamin
Deposited On:09 Sep 2013 13:12
Last Modified:06 Sep 2019 15:25

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