https://doi.org/10.1140/epjs/s11734-023-00797-6
Regular Article
Experimental study of dripping, jetting and drop-off from thin film flows on inclined fibers
1
Institute of Heat and Mass Transfer, RWTH Aachen University, Augustinerbach 6, 52056, Aachen, Germany
2
Department of Thermal and Fluid Engineering, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
3
TIPs, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, 1050, Bruxelles, Belgium
Received:
4
October
2022
Accepted:
30
January
2023
Published online:
9
March
2023
Gravity driven film flows on vertical fibers are known to exhibit a variety of flow dynamics including the formation of droplet trains induced by the hydrodynamic (Kapitza) and Plateau–Rayleigh instability mechanisms. Through an experimental study, it is shown how inclination of the fiber from the vertical influences these dynamics. The formation of waves, regime transitions from dripping to jetting regimes, as well as the onset of drop-off in the form of droplet detachment from the fiber are illustrated and described in dependence of the fiber inclination angle and the liquid mass flow rate. Additionally, the influence of fiber diameter and nozzle geometry on regime transitions and the onset of drop-off from the substrate are examined. It is shown that the onset of drop-off is strongly related to the transition from a regime characterized by a regular wave pattern to a regime characterized by an irregular wave pattern. It is also demonstrated that this regime transition depends not only on flow rate and fiber geometry, but also strongly on the inclination angle. Interestingly, a stabilizing effect of increasing the fiber inclination is detected for constant fiber geometry and film flow rate.
The original online version of this article was revised: Two references were added retrospectively in the published article and a number of typographical, elementary syntax and formatting errors were corrected.
A correction to this article is available online at https://doi.org/10.1140/epjs/s11734-023-00834-4.
Copyright comment corrected publication 2023
© The Author(s) 2023. corrected publication 2023
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