| Popis: |
This research investigates the performance of an assembly micro-atomizer under single-fluid and twin-fluid operational conditions of micro-encapsulation process. Alginate and CaCl2 aqueous solution are used as the membrane material and hardening agent, respectively. The high speed images were taken to investigate the formation processes of the microcapsules. Results showed that the formation of the microcapsules depends on the instability modes of the liquid column including asymmetry mode, helical mode, sinusoidal mode and spray developing mode as Reynolds number was increased from 221 to 2210. Excitation at resonance frequency of 2.18 kHz of this system resulted in the production of uniform-sized microcapsules. Moreover, SMD equal to 20 μm can be achieved in low GLR under twin-fluid atomization process. It is not easy to achieve by commercial apparatus. |
