Effect of PZT driving waveform and frequency on meniscus shape and dropon-demand droplet formation parameters Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/b2773z18x

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • For piezoelectric stack (PZT) driven droplet generator, the driving waveform and driving frequency effect on liquid filament shape and droplet characteristics have been experimentally studied. The experimental study was based on a PZT driven droplet generator with known geometric design parameters and working fluid properties. A lumped-element-model (LEM) constructed to study the acousticmechanical behavior of the droplet generator. The droplet generator volumetric rejection from experimental study compared with that from LEM. Results show that LEM can predict the internal acoustic-mechanical behavior with reasonable accuracy. Based on the LEM, the PZT displacement magnitude dominates the internal pressure variation within the chamber. However due to the natural response of droplet generator, the acoustic pressure in the droplet generator decays exponentially. Experimental data show that the droplet formation process can be waveform and frequency dependent. When the droplet formation process is driven in "low frequency" regime, droplet formation process is weakly affected by frequency. Meniscus interaction effects, which are the interaction of a liquid filament from different droplet generation cycles, on droplet formation process are present when droplet formation process is driven in "high frequency" regime. Due to the meniscus interaction effect, the droplet formation process at "high frequency" is waveform and frequency dependent. Results show that the droplet volume reduces slightly with PZT driving frequency, about 20%. Droplet velocity increases with driving frequency, about 40%. However the droplet break-off time and droplet velocity are weakly affect by the driving frequency.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Language
File Format
File Extent
  • 15944634 bytes
Replaces
Additional Information
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Rejecting to fix the formatting with the table of contents and list of figures. Once corrected then 1) open item that was rejected 2) replace file with revised file 3) resubmitt the item. Thanks, Julie on 2007-06-22T16:55:04Z (GMT)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2007-06-26T17:50:10Z (GMT) No. of bitstreams: 1 dissetationfinal.pdf: 15944634 bytes, checksum: e3103cfc110271cb24576012a55804b3 (MD5)
  • description.provenance : Submitted by Guozhong Yang (yangg@onid.orst.edu) on 2007-06-24T09:03:53Z No. of bitstreams: 1 dissetationfinal.pdf: 15944634 bytes, checksum: e3103cfc110271cb24576012a55804b3 (MD5)
  • description.provenance : Made available in DSpace on 2007-06-28T15:17:25Z (GMT). No. of bitstreams: 1 dissetationfinal.pdf: 15944634 bytes, checksum: e3103cfc110271cb24576012a55804b3 (MD5)
  • description.provenance : Submitted by Guozhong Yang (yangg@onid.orst.edu) on 2007-06-21T20:03:58Z No. of bitstreams: 1 Dissertation.pdf: 15940072 bytes, checksum: 33446fb5aebfc5eb5f077c79a4adf573 (MD5)

Relationships

In Administrative Set:
Last modified: 08/07/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items