Measuring contact line dissipation in dynamic wetting [Elektronisk resurs]
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Carlson, Andreas (författare)
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Bellani, Gabriele (författare)
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Amberg, Gustav (författare)
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KTH Skolan för teknikvetenskap (SCI) (utgivare)
- Publicerad: 2011
- Engelska 14
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Sammanfattning
Ämnesord
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- Dynamic wetting of a solid surface is a process that is ubiquitous in nature, and also of increasing technological importance. The underlying dissipative mechanisms are however still unclear. We present here dynamic wetting experiments of a droplet on a dry surface, showing that an important part of the dissipation may arise from a friction related to the motion of the contact line itself, and that this may be dominating the viscous friction in the flow adjacent to the contact line. By a combination of simulations and experiments, values of a corresponding friction factor are obtained. By this procedure the contact line friction factor can be distinguished and quantified, also in room temperature where other sources of dissipation are present. Water and glycerin-water mixtures on various surfaces have been investigated. We show the dependency of the friction factor on the nature of the surface, and the viscosity of the liquid.
Ämnesord
- Engineering and Technology (hsv)
- Mechanical Engineering (hsv)
- Fluid Mechanics and Acoustics (hsv)
- Teknik och teknologier (hsv)
- Maskinteknik (hsv)
- Strömningsmekanik och akustik (hsv)
- TECHNOLOGY (svep)
- Engineering mechanics (svep)
- Fluid mechanics (svep)
- TEKNIKVETENSKAP (svep)
- Teknisk mekanik (svep)
- Strömningsmekanik (svep)
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