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High speed particle image velocimetry measurements during water entry of rigid and deformable bodies

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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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Chicago
Nila, Alexandru, Steve Vanlanduit, Kameswara Vepa, Diederik Van Nuffel, Wim Van Paepegem, Joris Degroote, and Jan Vierendeels. 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, 1–11.
APA
Nila, Alexandru, Vanlanduit, S., Vepa, K., 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. 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Proceedings (pp. 1–11). Presented at the 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics.
Vancouver
1.
Nila A, Vanlanduit S, Vepa K, Van Nuffel D, Van Paepegem W, Degroote J, et al. High speed particle image velocimetry measurements during water entry of rigid and deformable bodies. 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Proceedings. 2012. p. 1–11.
MLA
Nila, Alexandru, Steve Vanlanduit, Kameswara Vepa, et al. “High Speed Particle Image Velocimetry Measurements During Water Entry of Rigid and Deformable Bodies.” 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Proceedings. 2012. 1–11. Print.
@inproceedings{3099971,
  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.},
  author       = {Nila, Alexandru and Vanlanduit, Steve and Vepa, Kameswara and Van Nuffel, Diederik and Van Paepegem, Wim and Degroote, Joris and Vierendeels, Jan},
  booktitle    = {16th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Proceedings},
  language     = {eng},
  location     = {Lisbon, Portugal},
  pages        = {1--11},
  title        = {High speed particle image velocimetry measurements during water entry of rigid and deformable bodies},
  year         = {2012},
}