Spreading dynamics of non-Newtonian inkjet drop on solid surface

Yangsoo Son, Chongyoup Kim

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

    Abstract

    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
    Pages988-990
    Number of pages3
    DOIs
    Publication statusPublished - 2008
    Event15th International Congress on Rheology - Monterey, CA, United States
    Duration: 2008 Aug 32008 Aug 8

    Publication series

    NameAIP Conference Proceedings
    Volume1027
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Other

    Other15th International Congress on Rheology
    Country/TerritoryUnited States
    CityMonterey, CA
    Period08/8/308/8/8

    Keywords

    • Inkjet drop formation
    • Maximum spreading
    • Zimm relaxation time

    ASJC Scopus subject areas

    • General Physics and Astronomy

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