Numerical investigations on the deformation styles and stress distributions of hyperelastic/viscoelastic spheres during water entry

2020 ◽  
Vol 127 (6) ◽  
pp. 064901 ◽  
Author(s):  
Liu Yang ◽  
Yingjie Wei ◽  
Cong Wang ◽  
Weixue Xia ◽  
Jiachuan Li
Keyword(s):  
Water Entry ◽  
Stress Distributions ◽  
Numerical Investigations

scholarly journals Numerical investigations of trajectory characteristics of a high-speed water-entry projectile

AIP Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 095107
Author(s):  
Qiang Li ◽  
Lin Lu ◽  
Tao Cai
Keyword(s):  
High Speed ◽  
Water Entry ◽  
Numerical Investigations

Numerical investigations on the oblique water entry of high-speed projectiles

2019 ◽  
Vol 362 ◽  
pp. 124547
Author(s):  
Jian-Guo Gao ◽  
Zhi-Hua Chen ◽  
Zhen-Gui Huang ◽  
Wei-Tao Wu ◽  
Yu-Jie Xiao
Keyword(s):  
High Speed ◽  
Water Entry ◽  
Numerical Investigations

Analysis and Prediction of Edge Effects in Laser Bending

2000 ◽  
Vol 123 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Jiangcheng Bao ◽  
Y. Lawrence Yao
Keyword(s):  
Residual Stress ◽  
Edge Effects ◽  
Laser Scanning ◽  
Laser Forming ◽  
Stress Distributions ◽  
Rate Dependency ◽  
Laser Bending ◽  
Numerical Investigations ◽  
Wide Range ◽  
Scanning Path

Laser forming of sheet metal offers the advantages of requiring no hard tooling and thus reduced cost and increased flexibility. It also enables forming of some materials and shapes that are not possible now. In single-axis laser bending of plates, the bending edge is found to be somewhat curved and the bending angle varies along the laser-scanning path. These phenomena are termed edge effects, which adversely affect the accuracy of the bending and result in undue residual stress. Numerical investigations are carried out to study the process transiency and the mechanism of the edge effects. Temperature dependency of material properties and strain-rate dependency of flow stress are considered in the numerical simulation to improve prediction accuracy. Numerical results are validated in experiments. Patterns of edge effects and resultant residual stress distributions are examined under a wide range of conditions. A more complete explanation for the mechanism of the edge effects is given.

scholarly journals Numerical Investigations of Cavitation Nose Structure of a High-Speed Projectile Impact on Water-Entry Characteristics

2020 ◽  
Vol 8 (4) ◽  
pp. 265
Author(s):  
Qiang Li ◽  
Lin Lu
Keyword(s):  
Drag Reduction ◽  
High Speed ◽  
Flow Characteristics ◽  
Water Entry ◽  
Navier Stokes ◽  
Cavitation Model ◽  
Lower Velocity ◽  
Numerical Investigations ◽  
Velocity Attenuation ◽  
Trajectory Stability

In this study, a detailed analysis of the influences of cavitation nose structure of a high-speed projectile on the trajectory stability during the water-entry process was investigated numerically. The Zwart-Gerber-Belamri (Z-G-B) cavitation model and the Shear Stress Ttransport (SST)k-ω turbulence model based on the Reynolds Averaged Navier–Stokes (RANS) method were employed. The numerical methodology was validated by comparing the numerical simulation results with the experimental photograph of cavitation shape and the experimental underwater velocity. Based on the numerical methodology, the disk and the conical cavitation noses were selected to investigate the water-entry characteristics. The influences of cavitation nose angle and cavitation nose diameter of the projectile on the trajectory stability and flow characteristics were carried out in detail. The variation features of projectile trajectory, velocity attenuation and drag were conducted, respectively. In addition, the cavitation characteristics of water-entry is presented and analyzed. Results show that the trajectory stability can be improved by increasing the cavitation nose angle, but the drag reduction performance will be reduced simultaneously. Additionally, due to the weakening of drag reduction performance, the lower velocity of the projectile will cause the damage of the cavitation shape and the trajectory instability. Furthermore, the conical cavitation nose has preferable trajectory stability and drag reduction performance than the disk cavitation nose.

Experimental and numerical investigations of water entry in subsea modules with porous structures

2021 ◽  
Vol 109 ◽  
pp. 102554
Author(s):  
Yingfei Zan ◽  
Ruinan Guo ◽  
Lihao Yuan ◽  
Qingwei Ma ◽  
Ao Zhou ◽  
...  
Keyword(s):  
Water Entry ◽  
Porous Structures ◽  
Numerical Investigations

Experimental and numerical investigations of fluid flow in a hydrocyclone without an air core

CIM Journal ◽  
2017 ◽  
Vol 8 (1) ◽  
Author(s):  
E. Kucukal ◽  
J. R. Kadambi ◽  
J. Furlan ◽  
R. Visintainer
Keyword(s):  
Fluid Flow ◽  
Numerical Investigations ◽  
Air Core

EFFECTS OF AIR ON SPLASHING DURING A LARGE DROPLET IMPACT: EXPERIMENTAL AND NUMERICAL INVESTIGATIONS

2006 ◽  
Vol 16 (8) ◽  
pp. 981-996 ◽  
Author(s):  
Richard A. Jepsen ◽  
Sam S. Yoon ◽  
Byron Demosthenous
Keyword(s):  
Droplet Impact ◽  
Large Droplet ◽  
Numerical Investigations
Sign in / Sign up

Export Citation Format

Share Document