Abstract
Kármán vortex streets are repeating patterns of swirling vortices, appearing when a fluid passes an obstacle at Re>50. We present an array of interacting vortices, a Kármán vortex city, that arises when a DNA solution flows through an array of micro posts at Re <0.5. Above thresholds in concentration and flow rate, the vortices formed behind posts interact, leading to concentration fluctuation waves. We explore the effect of lattice structure, polymer length and salt and relate the wave formation to the overlap concentration. Our work will allow us to optimize high-concentration DNA manipulation and sorting of DNA in microfluidic arrays.
| Original language | English |
|---|---|
| Title of host publication | MicroTAS 2021 - 25th International Conference on Miniaturized Systems for Chemistry and Life Sciences |
| Publisher | Chemical and Biological Microsystems Society |
| Pages | 13-14 |
| Number of pages | 2 |
| ISBN (Electronic) | 9781733419031 |
| Publication status | Published - 2021 |
| Event | 25th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2021 - Palm Springs, Virtual, United States Duration: 2021 Oct 10 → 2021 Oct 14 |
Conference
| Conference | 25th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2021 |
|---|---|
| Country/Territory | United States |
| City | Palm Springs, Virtual |
| Period | 2021/10/10 → 2021/10/14 |
Subject classification (UKÄ)
- Fluid Mechanics
Free keywords
- DNA concentration waves
- DNA sorting
- Kármán vortex street
- Pillar Arrays