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    Air entrainment in angled dip coating

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    Air entrainment in angled dip coating in ChemEngSci 1998.pdf (256.4Kb)
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    Publication date
    1998
    Author
    Cohu, O.
    Benkreira, Hadj
    Keyword
    Air Entrainment
    Dip Coating
    Coating Flows
    Dynamic Wetting
    Contact Angle
    Experiments
    Rights
    © 1998 Elsevier Ltd. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    Yes
    
    Metadata
    Show full item record
    Abstract
    The coating flow examined here, labelled angled dip coating, is that where a substrate enters a pool of liquid forming an angle ß with the vertical so that it intersects the liquid along a wetting line which is not perpendicular to the direction of its motion. This flow situation is distinctly different from that where the substrate, inclined in the other dimension by the so-called angle of entry ¿, intersects the liquid surface perpendicularly to its motion. Experiments were carried out with various liquids to determine the effect of ß on the substrate velocity at which air is entrained into the liquid. It was observed that as this angle departs from zero, air entrainment is delayed to higher speeds. The data show that the speed which is relevant to air entrainment is not the velocity of the substrate itself but its component normal to the wetting line. This result has important practical implications and suggests that this fundamental principle is also applicable to other coating flows.
    URI
    http://hdl.handle.net/10454/812
    Citation
    Cohu, O. and Benkreira, H. (1998). Air entrainment in angled dip coating. Chemical Engineering Science. Vol. 39, pp. 1357.
    Link to publisher’s version
    http://dx.doi.org/10.1016/S0009-2509(97)00323-0
    Type
    Article
    Collections
    Engineering and Informatics Publications

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