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Deformation of liquid droplets during collisions with hot walls: Experimental and Numerical Results
Author(s) -
Karl Alexander,
Anders Klaus,
Rieber Martin,
Frohn Arnold
Publication year - 1996
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19960130304
Subject(s) - mechanics , compressibility , surface tension , leidenfrost effect , deformation (meteorology) , materials science , volume of fluid method , volume (thermodynamics) , free surface , weber number , break up , optics , thermodynamics , physics , composite material , heat transfer , flow (mathematics) , heat transfer coefficient , reynolds number , nucleate boiling , turbulence
Measurements of droplet deformation during wall impingement were performed for ethanol droplets and water droplets with diameters ranging from 100 to 200 μm. The wall temperature is well above the Leidenfrost temperature of the droplet liquid. With monodisperse droplet streams and a special illumination technique, slow motion images of the phenomena can be obtained. Measurements with high temporal resolution below 1 μs are possible using a standard video camera. The experimental results are compared with numerical results, which were obtained by solving the three‐dimensional Navier‐Stokes equations for incompressible fluids including surface tension effects. The fluids are treated with the volume‐of‐fluid method and the free surface is modeled according to the continuum‐surface‐force model. Numerical and experimental results show good agreement.