A02

Experimental Investigation of Coalescence and Breakup of Droplets on Solid Surfaces – Generic Configuration Sessile Drop

Overview

Above: Generic configuration Sessile Drop. Below: Influence of the Spreading Coeffincient on the coalescence of drops. A contact angle forms (A) when the Spreading Coefficient ist negative. At a positive Spreading Coefficient a film of one droplet spreads over the other (B). C shows two immiscible drops 150 ms after coalescing. Image: SFB 1194

This experiment is designed to examine the coalescence of drops on a surface with a contact angle less than 90°. Furthermore, the breakup of evaporating drops on a complex surface will be studied. In both cases the central goal is a better understanding of these processes. Special attention will be directed to capturing the velocity field in the drop directly at the contact line. Special optical arrangements will allow a spatial resolution down to a few micrometers. The surface is constructed to also allow temperature gradients and electrical fields to be imparted. Temperature measurements will be performed using an infrared camera.

Scientific Staff:

Team

  Name Contact
Dr. Günter Auernhammer
+49 351 4658 486
Prof. Dr. rer. nat. Steffen Hardt
+49 6151 16-24274
L2|06 112
Maximilian Hartmann M.Sc.
+49 6151 16-24270
L2/06 108
SFB 1194 2019
Peyman Rostami M.Sc.

Publications and conference contributions

Jump to: 2020 | 2019 | 2018 | 2017
Number of items at this level: 12.

2020

Straub, Benedikt B. and Lah, David C. and Schmidt, Henrik and Roth, Marcel and Gilson, Laurent and Butt, Hans-Jürgen and Auernhammer, Günter K. (2020):
Versatile high-speed confocal microscopy using a single laser beam.
In: Review of Scientific Instruments, (3), 91. pp. 033706, ISSN 0034-6748,
DOI: 10.1063/1.5122311,
[Online-Edition: https://doi.org/10.1063/1.5122311],
[Article]

2019

Gerlach, Felix and Hartmann, Maximilian and Tropea, Cameron (2019):
The interaction of inner and outer surface corners during spontaneous wetting.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, 5832019. p. 123977, ISSN 09277757,
DOI: 10.1016/j.colsurfa.2019.123977,
[Article]

Hartmann, Maximilian and Fricke, Mathis and Weimar, Lukas and Gründing, Dirk and Marić, Tomislav and Bothe, Dieter and Hardt, Steffen (2019):
Breakup dynamics of capillary bridges on hydrophobic stripes.
[Online-Edition: http://arxiv.org/pdf/1910.01887v1],
[Report]

Rostami, Peyman and Straub, Benedikt and Auernhammer, Günter K. (2019):
Gas-phase induced Marangoni flow causes unstable drop merging.
In: Langmuir, 2019. American Chemical Society, ISSN 0743-7463,
DOI: 10.1021/acs.langmuir.9b02466,
[Online-Edition: https://doi.org/10.1021/acs.langmuir.9b02466],
[Article]

Henrich, Franziska and Linke, Dorota and Sauer, Hans Martin and Dörsam, Edgar and Hardt, Steffen and Butt, Hans-Jürgen and Auernhammer, Günter K. (2019):
Forced dynamic dewetting of structured surfaces: Influence of surfactants.
In: Physical Review Fluids, 4 (12), 2019. American Physical Society, p. 124202, ISSN 2469-990X,
DOI: 10.1103/PhysRevFluids.4.124202,
[Online-Edition: https://link.aps.org/doi/10.1103/PhysRevFluids.4.124202],
[Article]

Khalil, Adnan and Zimmermann, Matthias and Bell, Alena K. and Kunz, Ulrike and Hardt, Steffen and Kleebe, Hans-Joachim and Stark, Robert W. and Stephan, Peter and Andrieu-Brunsen, Annette (2019):
Insights into the interplay of wetting and transport in mesoporous silica films.
In: Journal of Colloid and Interface Science, (Online First), ISSN 00219797,
DOI: 10.1016/j.jcis.2019.09.093,
[Online-Edition: https://doi.org/10.1016/j.jcis.2019.09.093],
[Article]

Zhao, Binyu and Luo, Shuang and Bonaccurso, Elmar and Auernhammer, Günter K. and Deng, Xu and Li, Zhigang and Chen, Longquan (2019):
Resolving the Apparent Line Tension of Sessile Droplets and Understanding its Sign Change at a Critical Wetting Angle.
In: Physical Review Letters, 123 (9), ISSN 0031-9007,
DOI: 10.1103/PhysRevLett.123.094501,
[Online-Edition: https://doi.org/10.1103/PhysRevLett.123.094501],
[Article]

Hartmann, Maximilian and Hardt, Steffen (2019):
Stability of Evaporating Droplets on Chemically Patterned Surfaces.
In: Langmuir, 35 (14), pp. 4868-4875, ISSN 0743-7463,
DOI: 10.1021/acs.langmuir.9b00172,
[Online-Edition: https://doi.org/10.1021/acs.langmuir.9b00172],
[Article]

2018

Rostami, Peyman and Auernhammer, Günter K. (2018):
Gas phase induced Marangoni flows causes instable wetting film during drop merging.
In: 16th Multiphase Flow Conference & Short Course, Dresden, November 13-16, 2018, [Conference or Workshop Item]

Rostami, Peyman and Straub, Benedikt and Henrich, Franziska (2018):
Merging drops with unstable wetting films.
In: 14th Zsigmondy Colloquium, Mainz, April 9-11, 2018, [Conference or Workshop Item]

Auernhammer, Günter K. and Henrich, Franziska and Linke, Dorota and Sauer, Hans Martin and Dörsam, Edgar and Hardt, Steffen and Butt, Hans-Jürgen (2018):
Forced dynamic dewetting of structured surfaces: Influence of surfactants.
In: DPG-Frühjahrstagung und EPS-CMD27, Berlin, March 11-16, 2018, [Conference or Workshop Item]

2017

Hartmann, Maximilian and Hardt, Steffen (2017):
Breakup Behavior of a Capillary Bridge on a Hydrophobic Stripe Separating two Hydrophilic Stripes.
In: 70th Annual Meeting of the APS Division of Fluid Dynamics, Denver, Colorado, November 19-21, 2017, [Online-Edition: https://arxiv.org/abs/1910.01887],
[Conference or Workshop Item]

This list was generated on Mon May 25 01:25:36 2020 CEST.