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

Figure 6. Nozzle maximum wall shear stress (WSS) versus impingement maximum shear stress (SS) during dispensing. A transient increase in maximum
wall shear stress in the nozzle was observed for both nozzle sizes, (a) 150 µm and (b) 300 µm. The maximum wall shear stress increased by pressure in an
almost linear fashion for both nozzle sizes. The impingement maximum shear stress is plotted versus time for different upstream pressure for both nozzle
sizes in (c) and (d). The impingement shear stress increases in a non-linear fashion with upstream pressure. The ratio of the impingement shear stress
on the platform to the nozzle wall shear stress is depicted in (e) and (f) for both nozzles. As the flow regime transition from droplet to jet occurs, the
impingement shear stress becomes dominant.

Volume 9 Issue 4 (2023) 391 https://doi.org/10.18063/ijb.743