Vertical Water Entry of a Flexible Wedge into Calm Water: A Fluid–Structure Interaction Experiment

2019 ◽  
Author(s):  
Zhongshu Ren ◽  
Zhaoyuan Wang ◽  
Fred Stern ◽  
Carolyn Judge ◽  
Christine Ikeda-Gilbert
Keyword(s):  
Fluid Structure Interaction ◽  
Water Entry ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Calm Water ◽  
Interaction Experiment

scholarly journals Image-based tracking technique assessment and application to a fluid–structure interaction experiment

2019 ◽  
Vol 233 (16) ◽  
pp. 5724-5734 ◽  
Author(s):  
DA Mella ◽  
W Brevis ◽  
JE Higham ◽  
V Racic ◽  
L Susmel
Keyword(s):  
Fluid Structure Interaction ◽  
Sampling Frequency ◽  
Image Resolution ◽  
Target Motion ◽  
Image Correlation ◽  
Correct Selection ◽  
Measuring Device ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Experiment

This work analyses the accuracy and capabilities of two image-based tracking techniques related to digital image correlation and the Lucas–Kanade optical flow method, with the subsequent quantification of body motion in a fluid–structure interaction experiment. A computer-controlled shaker was used as a benchmark case to create a one-dimensional oscillatory target motion. Three target frequencies were recorded. The measurements obtained with a low-cost digital camera were compared to a high-precision motion tracking system. The comparison was performed under changes in image resolution, target motion and sampling frequency. The results show that, with a correct selection of the processing parameters, both tracking techniques were able to track the main motion and frequency of the target even after a reduction of four and five times the sampling frequency and image resolution, respectively. Within this good agreement, the Lucas–Kanade technique shows better accuracy under tested conditions, achieving up to 15.6% of lower tracking error. Nevertheless, the achievement of this higher accuracy is highly dependent on the position of the selected initial target point. These considerations are addressed to satisfactorily track the response of a wall-mounted cylinder subjected to a range of turbulent flows using a single camera as the measuring device.

Fluid-structure interaction during the water entry of flexible cylinders

2015 ◽  
Author(s):  
R. Panciroli ◽  
G. Falcucci ◽  
G. Erme ◽  
E. De Santis ◽  
E. Jannelli
Keyword(s):  
Fluid Structure Interaction ◽  
Water Entry ◽  
Fluid Structure ◽  
Structure Interaction

A hybrid model for simulation of fluid–structure interaction in water entry problems

2021 ◽  
Vol 33 (1) ◽  
pp. 017102
Author(s):  
Hashem Moradi ◽  
Ahmad Rahbar Ranji ◽  
Hassan Haddadpour ◽  
Hajar Moghadas
Keyword(s):  
Hybrid Model ◽  
Fluid Structure Interaction ◽  
Water Entry ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals 3D Fluid-Structure Interaction Experiment and Benchmark Results

PAMM ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 451-452 ◽  
Author(s):  
Andreas Hessenthaler ◽  
Stephanie Friedhoff ◽  
Oliver Röhrle ◽  
David A. Nordsletten
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction Experiment

scholarly journals The Sliding and Overturning Analysis of Spent Fuel Storage Rack Based on Dynamic Analysis Model

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Yu Liu ◽  
Daogang Lu ◽  
Yuanpeng Wang ◽  
Hongda Liu
Keyword(s):  
Impact Force ◽  
Fluid Structure Interaction ◽  
Seismic Loading ◽  
Spent Fuel ◽  
Analysis Model ◽  
Fem Model ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Fuel Storage ◽  
Interaction Experiment

Spent fuel rack is the key equipment for the storage of spent fuel after refueling. In order to investigate the performance of the spent fuel rack under the earthquake, the phenomena including sliding, collision, and overturning of the spent fuel rack were studied. An FEM model of spent fuel rack is built to simulate the transient response under seismic loading regarding fluid-structure interaction by ANSYS. Based on D’Alambert’s principle, the equilibriums of force and momentum were established to obtain the critical sliding and overturning accelerations. Then 5 characteristic transient loadings which were designed based on the critical sliding and overturning accelerations were applied to the rack FEM model. Finally, the transient displacement and impact force response of rack with different gap sizes and the supporting leg friction coefficients were analyzed. The result proves the FEM model is applicable for seismic response of spent fuel rack. This paper can guide the design of the future’s fluid-structure interaction experiment for spent fuel rack.

scholarly journals Numerical simulation of water entry problems considering air effect using a multiphase Riemann-SPH model

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Zi-Fei Meng ◽  
Fu-Ren Ming ◽  
Ping-Ping Wang ◽  
A-Man Zhang
Keyword(s):  
Particle Density ◽  
Fluid Structure Interaction ◽  
Water Entry ◽  
Special Treatment ◽  
Ocean Engineering ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Sph Model ◽  
Motion Characteristic ◽  
Air Effect

AbstractThe water entry is a classic fluid-structure interaction problem in ocean engineering. The prediction of impact loads on structure during the water entry is critical to some engineering applications. In this paper, a multiphase Riemann-SPH model is developed to investigate water entry problems. In this model, a special treatment, a cut-off value for the particle density, is arranged to avoid the occurrence of negative pressure. A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows. In the present work, considering the air effect, several typical water entry problems are studied, and the evolution of multiphase interface, the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed. Compared with the experimental data, the present multiphase SPH model can obtain satisfactory results, and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.

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