Spreading dynamics of non-Newtonian inkjet drop on solid surface

Yangsoo Son, Chongyoup Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this research we investigated the spreading of non-Newtonian inkjet droplets impinged normally on glass surfaces. The wettability of solid substrate was varied by adsorbing a self-assembled monolayer of octadecyltrichloro-silane followed by the exposure to UV-ozone plasma. To understand the effect of non-Newtonian characteristics of fluids on spreading, we chose polyethylene oxide solutions in addition to Newtonian fluid. The concentrations of polyethylene oxide were in the dilute range. We observed that the addition of PEO suppresses the formation of satellite drops during the drop formation. The maximum spreading factor during the transient state was reduced by the added polymer only when the Weber number was large while the equilibrium spreading factor was not affected. The extensional nature of the polymer appears to be responsible for the reduced maximum spreading factor.

Original languageEnglish
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Number of pages3
Publication statusPublished - 2008
Event15th International Congress on Rheology - Monterey, CA, United States
Duration: 2008 Aug 32008 Aug 8

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other15th International Congress on Rheology
Country/TerritoryUnited States
CityMonterey, CA


  • Inkjet drop formation
  • Maximum spreading
  • Zimm relaxation time

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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