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High speed particle image velocimetry measurements during water entry of rigid and deformable bodies
Nila, A.; Vanlanduit, S.; Vepa, K.S.; Van Nuffel, D.; Van Paepegem, W.; Degroote, J.; Vierendeels, J. (2012). High speed particle image velocimetry measurements during water entry of rigid and deformable bodies, in: 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics: proceedings. pp. 11
In: (2012). 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics: proceedings. [S.n.]: Lisbon. , more

Available in  Authors 
    VLIZ: Open Repository 266875 [ OMA ]
Document type: Conference paper

Authors  Top 
  • Van Paepegem, W., more
  • Degroote, J.
  • Vierendeels, J.

Abstract
    This paper presents experimental results regarding the slamming of rigid and deformable bodies on to initially calm water surface with constant entry speeds. Three test cases, corresponding to a rigid wedge, a rigid cylinder and a deformable cylinder are analyzed. High speed Particle Image Velocimetry (PIV) is employed in order to determine features of the flow around slammed bodies, with interest in the velocity field and free surface elevation characterization. The free surface elevation profiles are compared with analytical results, and are found to be in good agreement. Further, numerical simulations using the LSDyna software are conducted for the rigid wedge test-case, and the velocity fields obtained from the experiments are compared with calculated velocity fields from the simulations, showing good overall agreement. The limitations of the optical technique are also discussed. For the cylinder slamming test cases, free surface elevation profiles and velocity fields are presented, with a comparison of the flow features between rigid and deformable cylinders test cases. This approach attempts to offer the possibility of validating numerical results with non-intrusive measurements performed by PIV for test cases that are numerically challenging, such as the deformable body impact on the water surface.

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