Numerical Simulation for Fluid Impact Loads by Flat Plate with Incident Angles

Abstract

The free-surface motions interacting with structures are investigated numerically using the Moving Particle Semi-implicit (MPS) method proposed by Koshizuka et al. (1996) for solving incompressible flow. In the method, Lagrangian moving particles are used instead of Eulerian approach using grid system. Therefore the terms of time derivatives in Navier-Stokes equation can be directly calculated without any numerical diffusion or instabilities due to the fully Lagrangian treatment of fluid particles and topological failure never occur. The MPS method is applied to the numerical study on the fluid impact loads for wet-drop tests in a LNG tank, and the results are compared with experimental ones.

Numerical Investigation of the Impact Pressure Acting on Arbitrary Ship Sections Falling into the Water Surface

“…Nowadays, with the improvement of computational resources and the development of robust and efficient solution algorithms (Kapsenberg, 2011), these difficulties can be surmounted by way of Computational Fluid Dynamics (CFD) methods. In fact, CFD methods have been applied to impact problems for the two last decades for many aims in particular to predict local pressures on the bottom surface using the Navier-Stokes solver and VOF transport method (Ochi & Motter, 1973;Yum & Yoon, 2008), and investigated gravity and momentum effects during water entry (Fairlie-Clarke & Tveitnes, 2008), and free surface motions with floating structures by Moving Particle Semi-implicit (MPS) (Lee, et al, 2008), and air compressibility effect of the water impact (Phi & Ahn, 2011).…”

Air Compressibility Effect in CFD-based Water Impact Analysis

“…New trends are towards direct numerical solutions of NavierStokes equations (Yum and Yoon 2008, Lee et al 2008, Kleefsman et al 2005, Zhang et al 2010. Yoon (1991) and Lee et al (2008) applied Lagrangian and particle based methods for water impact simulation.…”

“…Yoon (1991) and Lee et al (2008) applied Lagrangian and particle based methods for water impact simulation. Kang and Troesch (1990) reported impact load prediction for 3D bodies.…”