Page 397 - IJB-9-4

International Journal of Bioprinting Impingement shear stress during microvalve-based bioprinting

Figure 4. Microvalve dispensing dynamics. A transition from droplet to jet formation was observed when upstream pressure was increased: snapshots
of dispensed alginate at four time points (t = 500, 1000, 1500, and 2000 µs) after nozzle opening for nozzle diameters of 150 µm (a) and 300 µm (b) at
different upstream pressure are presented. Average alginate velocity at the outlet of the nozzle is plotted versus time for (c) nozzle diameter of 150 µm and
(d) 300 µm. The position of the lead point of the droplet is plotted versus time for (e) nozzle diameter of 150 µm and (f) 300 µm. The speed of droplet lead
point was calculated using Equation IV and plotted for (g) nozzle diameters of 150 µm and (h) 300 µm.

Volume 9 Issue 4 (2023) 389 https://doi.org/10.18063/ijb.743