A02

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

Overview

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:

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

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

Jump to: 2019 | 2018 | 2017
Number of items at this level: 8.

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, p. 123977, 583, ISSN 09277757,
DOI: 10.1016/j.colsurfa.2019.123977,
[Online-Edition: https://doi.org/10.1016/j.colsurfa.2019.123977],
[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, pp. 4868-4875, 35, (14), 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 Fri Nov 15 01:43:24 2019 CET.