Paper Number
GR19                         My Program 

Session
Gallery of Rheology Contest

Title
Stress-birefringent droplet spread

Presentation Date and Time
October 16, 2024 (Wednesday) 6:30

Track / Room
Gallery of Rheology / Waterloo 3 & 4

Authors (Click on name to view author profile)

  1. D'Angelo, Olfa (Erlangen-Nürnberg University)
  2. Voigtmann, Thomas (Deutsches Zentrum für Luft-und Raumfahrt e.V., Institut für Materialphysik im Weltraum)
  3. Jalaal, Maziyar (University of Amsterdam, Institute of Physics)

Author and Affiliation Lines (in printed abstract book)
Olfa D'Angelo1, Thomas Voigtmann2 and Maziyar Jalaal3
1Erlangen-Nürnberg University, Erlangen, Germany; 2Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft-und Raumfahrt e.V., Köln 51170, Germany; 3Institute of Physics, University of Amsterdam, Amsterdam, The Netherlands

Speaker / Presenter 
D'Angelo, Olfa

Keywords
experimental methods; additve manufacturing; low gravity research; methods; non-Newtonian fluids; space applications; techniques

Text of Abstract
The dynamics of internal stresses in non-Newtonian fluid droplets are observed, under microgravity and Earth gravity conditions, during spread. By utilizing flow-induced birefringence, we capture patterns that indicate stress distribution within the droplets. Images, taken both from the side and from below, showcase the stark differences in droplet morphology and stress magnitude under varying gravitational conditions, and are used to calibrate numerical simulation.