title: Imaging internal flows in a drying sessile polymer dispersion drop using Spectral Radar Optical Coherence Tomography (SR-OCT).
abstract: In this work, we present the visualization of the internal flows in a drying sessile polymer dispersion drop on hydrophilic and hydrophobic surfaces with Spectral Radar Optical Coherence Tomography (SR-OCT). We have found that surface features such as the initial contact angle and pinning of the contact line, play a crucial role on the flow direction and final shape of the dried drop. Moreover, imaging through selection of vertical slices using optical coherence tomography offers a feasible alternative compared to imaging through selection of narrow horizontal slices using confocal microscopy for turbid, barely transparent fluids.
authors.affiliation: Technische Universität Darmstadt, Institute of Fluid Mechanics and Aerodynamics, Darmstadt, Germany. manukyan@csi.tu-darmstadt.de
authors.forename: Selin
authors.initials: S
authors.lastname: Manukyan
authors.forename: Hans M
authors.initials: HM
authors.lastname: Sauer
authors.forename: Ilia V
authors.initials: IV
authors.lastname: Roisman
authors.forename: Kyle A
authors.initials: KA
authors.lastname: Baldwin
authors.forename: David J
authors.initials: DJ
authors.lastname: Fairhurst
authors.forename: Haida
authors.initials: H
authors.lastname: Liang
authors.forename: Joachim
authors.initials: J
authors.lastname: Venzmer
authors.forename: Cameron
authors.initials: C
authors.lastname: Tropea