Free Surface Effect and Spike of a Cylinder Piercing Water Surface

CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2013, Vol. 30 ›› Issue (2): 187-193.

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Free Surface Effect and Spike of a Cylinder Piercing Water Surface

SUN Shili¹, SUN Yilong², HU Jingzhong³, HU Jian⁴

1. College of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
2. China Ship Development and Design Center, Shanghai 200240, China;
3. Shanghai Waigaoqiao Shipbuilding Company, Shanghai 200137, China;
4. College of Ship Building, Harbin Engineering University, Harbin 150001, China

Received:2012-05-29 Revised:2012-11-01 Online:2013-03-25 Published:2013-03-25

Abstract

Abstract: To analyze force of fluid on a rigid object near free surface,a mathematical model with free surface effect is developed based on potential flow theory.It is calculated with boundary element method.Nonlinear kinematic and dynamic boundary conditions are taken into consideration.With control equation and boundary conditions,piercing cylinder through free surface and phenomena of spike are simulated.A comparison between numerical and experimental results shows that the method is appropriate.Pressure on moving objects,transform of free surface,resultant hydrodynamic force and velocity of flow field are analyzed in detail.It shows that the nonlinear method with free surface effect predicts precisely force on moving objects in vicinity of free surface.

Key words: cylinder, free surface effect, spike, boundary element method

CLC Number:

U661.1

SUN Shili, SUN Yilong, HU Jingzhong, HU Jian. Free Surface Effect and Spike of a Cylinder Piercing Water Surface[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2013, 30(2): 187-193.

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Free Surface Effect and Spike of a Cylinder Piercing Water Surface

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