Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Tomographic PIV measurement of internal complex flow of an evaporating droplet with non-uniformly receding contact lines

  • Kim, Hyoungsoo (Department of Mechanical and Aerospace Engineering, Princeton University) ;
  • Belmiloud, Naser (SCREEN SPE Germany GmbH) ;
  • Mertens, Paul W. (IMEC)
  • Received : 2016.07.27
  • Accepted : 2016.08.19
  • Published : 2016.08.31
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Abstract

We investigate an internal flow pattern of an evaporating droplet where the contact line non-uniformly recedes. By using tomographic Particle Image Velocimetry, we observe a three-dimensional azimuthal vortex pair that is maintained until the droplet is completely dried. The non-uniformly receding contact line motion breaks the flow symmetry. Finally, a simplified scaling model presents that the mechanical stress along the contact line is proportional to the vorticity magnitude, which is validated by the experimental results.

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References

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