Destabilization and dry-spot nucleation in thin liquid films on partially wetting substrates using a low-pressure air-jet

C.W.J. Berendsen, J.C.H. Zeegers, A.A. Darhuber

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

    Samenvatting

    The rupture of a thin liquid film on a partially wetting substrate can be initiated by external forces. In this manuscript we present experiments and numerical simulations of the effects of a laminar axisymmetric air-jet impinging on triethylene glycol films. We numerically calculate stagnation pressures and shear stress distributions that are used in a model for the thin liquid film dynamics. Experimentally, we distinguish three regimes: 1) the depressions made by low pressure air-jets level out, 2) for intermediate pressures a single dry-spot is nucleated that grows with a constant dewetting speed, whereas 3) for higher pressure air-jets the film is thinned and a large number of dry-spots nucleate, grow and leave a droplet pattern behind. In the third regime the dewetting speed was not independent of local film thickness. Numerical simulations show a qualitative agreement with the experimental observations.
    Originele taal-2Engels
    TitelProceedings of the 3rd Micro and Nano Flows Conference, August 22-24, Thessaloniki, Greece
    Pagina's1-8
    StatusGepubliceerd - 2011
    Evenement3rd Micro and Nano Flows Conference (MNF 2011), August 22-24, 2011, Thessaloniki, Greece - Makedonia Palace Hotel, Thessaloniki, Griekenland
    Duur: 22 aug 201124 aug 2011
    http://www.mnf2011.com/

    Congres

    Congres3rd Micro and Nano Flows Conference (MNF 2011), August 22-24, 2011, Thessaloniki, Greece
    Verkorte titelMNF 2011
    LandGriekenland
    StadThessaloniki
    Periode22/08/1124/08/11
    Ander3rd Micro and Nano Flows Conference MFN 2011
    Internet adres

    Vingerafdruk Duik in de onderzoeksthema's van 'Destabilization and dry-spot nucleation in thin liquid films on partially wetting substrates using a low-pressure air-jet'. Samen vormen ze een unieke vingerafdruk.

    Citeer dit