Particle monolayer assembly in evaporating salty colloidal droplets
Myrthe A. Bruning, Laura Loeffen and Alvaro Marin
Physical Review Fluids 5, 083603 (2020) [Editor’s Suggestion]
DOI: 10.1103/PhysRevFluids.5.083603
All posts by Alvaro Gomez Marin
Alvaro presented in January 2020 his TEDx talk “Why Artists and Scientists should hand out more often”, where he talked about his work with the artist Maurice Mikkers, and about why these collaborations should occur more often. You can see it in our Gallery.
We are not doing research on any COVID19 topic, but we support and encourage all those who are doing (and can do it)!
We continue doing our jobs and several papers have been submitted and published on our usual topics, also some video has been released, check our publications and gallery for more info.
Stay safe and hope to see you soon 🙏
Transition from clogging to continuous flow in constricted particle suspensions
Mathieu Souzy, Iker Zuriguel and Alvaro Marin
Physical Review E 101, 060901R(2020)
DOI: 10.1103/PhysRevE.101.060901
Single-Camera 3D PTV Methods for Evaporation-Driven Liquid Flows in Sessile Droplets
Massimiliano Rossi and Alvaro Marin
Droplet Interactions and Spray Processes. Fluid Mechanics and Its Applications, vol. 121 (2020)
DOI:10.1007/978-3-030-33338-6_18
Turning Drops into Bubbles: Cavitation by Vapor Diffusion through Elastic Networks Myrthe A. Bruning, Maxime Costalonga, Jacco H. Snoeijer, and Alvaro Marin
Physical Review Letters 123, 214501 (2019)
DOI: 10.1103/PhysRevLett.123.214501
Interfacial flows in sessile evaporating droplets of mineral water
Massimiliano Rossi, Alvaro Marin, C.J.Kaehler
Physical Review E 100, 033103 (2019)
DOI: 10.1103/PhysRevE.100.033103
Solutal Marangoni flow as the cause of ring-stains from drying salty colloidal drops
Alvaro Marin, Stefan Karpitschka, Diego Noguera-Marín, Miguel A. Cabrerizo-Vílchez, Massimiliano Rossi, Christian J. Kähler, Miguel A. Rodríguez Valverde
Physical Review Fluids 4,041601R (2019)
DOI:10.1103/PhysRevFluids.4.041601
Particle distribution and velocity in electrokinetically induced banding
Massi Rossi, Alvaro Marin, Necmettin Cevheri, Christian J Kähler, Minami Yoda
Microfluidics and Nanofluidics 23(5):67(2019)
DOI: https://doi.org/10.1007/s10404-019-2227-9
It all started many years ago: I was in the lab planning a droplet evaporation experiment and I added a tiny amount of salt to a particle solution to balance the liquid/particle density ratio. When I left the droplet to evaporate I could not believe it… the flow inside the droplet went exactly in the opposite direction as it should go, and I mean exactly in the three dimensions and three components!. Years after, my colleagues from the University of Granada showed me some funky ring-shaped stains that they observed in salty droplets, and they also had a good hypothesis for the flow inversion.
It has been several years working on this project with colleagues from 3 different countries and 5 different institutions. A few recent collaborations have been crucial: on the one hand, the simulations from both Stefan Karpitschka (Max-Planck for Dynamics & Self-organization, Göttingen) and Christian Diddens (TU Eindhoven)
While writing the paper, I met the artist Maurice Mikkers, the man behind the imaginarium of tears, and the beautiful micrographs of dried tears here shown below. Everything made sense then, the outer rim that you can see in his micrographs also follows the mechanism we propose!.
The paper will be published soon in Physical Review Fluids, you can find an arXiv preprint here.
