TY - ADVS
T1 - Micro droplet trains – mind the step!
T2 - Gallery of Fluid Motion APS DFD 2018 entry# V0074
A2 - Schirrmann, Kerstin
A2 - Caceres, Gabriel
A2 - Juel, Anne
N1 - The uploaded file is an updated version of the original entry at the 71th meeting of the APS Division of Fluid Dynamics, original link is provided
PY - 2018/11/18
Y1 - 2018/11/18
N2 - Micro droplets and coated micro droplets serve as well defined tiny reaction chambers or basis for capsules in chemistry and microbiology. However, the initially separated droplets tend to form groups (or coalesce) whenever geometrical defects occur in the channel. By introducing a defined perturbation in form of a sudden channel expansion, we can study this group formation systematically. We get beautiful images of very regular trains of coated micro droplets turning into well defined groups of different sizes. Using a purely kinematic model we can even predict, how many droplets will join a group, depending on initial distance, length and coating thickness. Thus, an initially undesired effect became a well defined and visually appealing phenomenon.
AB - Micro droplets and coated micro droplets serve as well defined tiny reaction chambers or basis for capsules in chemistry and microbiology. However, the initially separated droplets tend to form groups (or coalesce) whenever geometrical defects occur in the channel. By introducing a defined perturbation in form of a sudden channel expansion, we can study this group formation systematically. We get beautiful images of very regular trains of coated micro droplets turning into well defined groups of different sizes. Using a purely kinematic model we can even predict, how many droplets will join a group, depending on initial distance, length and coating thickness. Thus, an initially undesired effect became a well defined and visually appealing phenomenon.
KW - Microfluidics
KW - Coated droplets
KW - Coalescence and pattern formation
UR - https://gfm.aps.org/meetings/dfd-2018/5b9bbfc3b8ac3105e5ac9052
M3 - Digital or Visual Products
ER -