We have fabricated a droplet generator using replica molding technique. In particular, we have studied the formation of oil droplets in a T-junction microfluidic device. We used both newtonian and non newtonian liquids. As non newtonian liquids we prepared aqueous solutions of xanthan, which exhibit shear-thinning effects. We studied the properties of different regimes of droplet formation and we analyzed lenght of the droplets in these regimes as a function of the capillary number. As for newtonian liquids, our result are in good agreement with the theoretical models. Finally, thanks to the introduction of an effective capillary number also for non newtonian liquids, we have compared lenghts of the droplets between the two categories of liquids.
Produzione di gocce in fluidi non newtoniani mediante un dispositivo con giunzione a T.
Della Fera, Stefano
2016/2017
Abstract
We have fabricated a droplet generator using replica molding technique. In particular, we have studied the formation of oil droplets in a T-junction microfluidic device. We used both newtonian and non newtonian liquids. As non newtonian liquids we prepared aqueous solutions of xanthan, which exhibit shear-thinning effects. We studied the properties of different regimes of droplet formation and we analyzed lenght of the droplets in these regimes as a function of the capillary number. As for newtonian liquids, our result are in good agreement with the theoretical models. Finally, thanks to the introduction of an effective capillary number also for non newtonian liquids, we have compared lenghts of the droplets between the two categories of liquids.File | Dimensione | Formato | |
---|---|---|---|
Tesi_LT_Della_Fera.pdf
accesso aperto
Dimensione
3.45 MB
Formato
Adobe PDF
|
3.45 MB | Adobe PDF | Visualizza/Apri |
The text of this website © Università degli studi di Padova. Full Text are published under a non-exclusive license. Metadata are under a CC0 License
https://hdl.handle.net/20.500.12608/26854