Two-stage ultrasonic atomization using a gravity-fed pre-stage

Balasubramanian Nallannan, Ilkka Nissilä, Mikko Seppänen, Henri Siljanen, Heikki J. Nieminen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Common disc-type ultrasonic atomizers are characterized by a liquid column of millimeters to centimeters above the disc to successfully atomize the liquid. This results in to a fountain and splash formation, along with heating of the liquid, which typically are undesired. In recent studies, this limitation has been overcome by introducing large-sized droplet generation as a pre-stage to the ultrasonic atomization process. This, however, typically requires a pump to feed the atomizer. In the present study, we designed a novel single drop dispenser as a pre-stage which can operate using gravity with timing option, and thereby eliminating the need for a pump for the pre-stage dispensing.
Original languageEnglish
Title of host publication2021 IEEE International Ultrasonics Symposium (IUS)
Number of pages4
ISBN (Electronic)978-0-7381-1209-1
Publication statusPublished - 2021
MoE publication typeA4 Conference publication
EventIEEE International Ultrasonics Symposium - Virtual, Online
Duration: 11 Sept 202116 Sept 2021


ConferenceIEEE International Ultrasonics Symposium
Abbreviated titleIUS
CityVirtual, Online


  • heating systems
  • liquids
  • ultrasonic imaging
  • valves
  • acoustics
  • delays
  • feeds


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