Evaporating water drops on a horizontal heated substrate were investigated experimentally. The heater was made of a constantan foil with the thickness of 25 μm and size of 42 × 35 mm2. The temperature of the bottom foil surface was measured by the infrared (IR) camera. To determine the heat flux density during evaporation of liquid near the contact line, the Cauchy problem for the heat equation was solved using the temperature data. The maximum heat flux density is obtained in the contact line region and exceeds the average heat flux density from the entire foil surface by the factor of 5–7. The average heat flux density in the region wetted by the drop exceeds the average heat flux density from the entire foil surface by the factor of 3–5. This fact is explained by the heat influx from the foil periphery to the drop due to the relatively high heat conductivity coefficient of the foil material and high evaporation rate in the contact line region. Heat flux density profiles for pairs of sessile droplets are also investigated.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Heat Flux at the Surface of Metal Foil Heater under Evaporating Sessile Droplets


    Beteiligte:
    Igor Marchuk (Autor:in) / Andrey Karchevsky (Autor:in) / Anton Surtaev (Autor:in) / Oleg Kabov (Autor:in)


    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Profile Patterns and Stability of Evaporating Liquid Sessile Drops

    David Chao / John Sankovic / Nengli Zhang | AIAA | 2006


    Numerical Analysis of Axisymmetric Sessile and Pendant Droplets

    Hayashi, A. / Jimbo, I. / Space Utilization Research Society | British Library Conference Proceedings | 2002


    Effect of Evaporating Droplets on Shock Waves

    Kersey, James / Loth, Eric / Lankford, Dennis | AIAA | 2010


    Effects of Evaporating Droplets on Shock Waves

    Kersey, J | Online Contents | 2010