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

A Hybrid Model to Analyze the Fluid-Structure Interaction Phenomenon of a Relief System and Experimental Validation

2019 ◽  
Author(s):  
Feng Jie Zheng ◽  
Fu Zheng Qu ◽  
Xue Guan Song
Keyword(s):  
Hybrid Model ◽  
Pressure Fluctuation ◽  
Fluid Structure Interaction ◽  
Relief Valve ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Model Combining ◽  
Valve Motion ◽  
Practical Engineering ◽  
Cfd Method

Abstract As one essential component of a pressurized system, a relief valve is used to guarantee the pressure within a prescribed range. But in practical engineering, pressure fluctuation caused by the operation of a relief valve will travel along the pipeline and couple with the motion of the valve, which might result in malfunction of the valve and the system. In order to investigate the fluid-structure interaction (FSI) phenomenon, a hybrid model combining the method of characteristics (MOC) and computational fluid dynamics (CFD) method is proposed. In the hybrid FSI model, the characteristics of pressure resource is modeled using the performance curves, the compressible gas transmitting in the pipe is calculated by one-dimensional MOC, and the air flow in the valve as well as the valve motion is simulated by a two-dimensional CFD model. To validate the hybrid model, 1:1 scaled test rig is conducted. The compared results show that the hybrid model not only can accurately capture the pressure fluctuation in straight pipeline induced by the closure of the valve but also can accurately predict the forms of the valve motion.

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

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.

Sign in / Sign up

Export Citation Format

Share Document