TY - JOUR
T1 - A two-phase flow model coupling with volume of fluid and immersed boundary methods for free surface and moving structure problems
AU - Zhang, Cheng
AU - Zhang, Wei
AU - Lin, Nansheng
AU - Tang, Youhong
AU - Zhao, Chengbi
AU - Gu, Jian
AU - Lin, Wei
AU - Chen, Xiaoming
AU - Qiu, Ang
PY - 2013
Y1 - 2013
N2 - A numerical model is developed to solve increasing ocean engineering problems involving complex and/or moving rigid structures and nonlinear free surface action with considering air movement effects. The model is based on the two-phase flow model of incompressible viscous immiscible fluids containing various interfaces, and employs a coupled immersed boundary (IB) and volume of fluid (VOF) methods. To solve the governing equations, a two-step projection method is employed and the finite difference method on a staggered and fixed Cartesian grid is used throughout the computation. The bi-conjugate gradient stabilized technique is applied to solve the pressure Poisson equation. In particular, the advection term is discretized in a composite difference scheme to enhance the stability of the algorithm. The direct forcing IB method is utilized to deal with no-slip boundary condition, while the VOF method, which employs a piecewise line interface calculation technique and a Lagrange method to reconstruct and update the interface respectively, is used to track distorted and broken free surfaces. The results of this study demonstrate the accuracy and capability of the two-phase model to simulate a moving body in free surface flows while also considering air movement effects.
AB - A numerical model is developed to solve increasing ocean engineering problems involving complex and/or moving rigid structures and nonlinear free surface action with considering air movement effects. The model is based on the two-phase flow model of incompressible viscous immiscible fluids containing various interfaces, and employs a coupled immersed boundary (IB) and volume of fluid (VOF) methods. To solve the governing equations, a two-step projection method is employed and the finite difference method on a staggered and fixed Cartesian grid is used throughout the computation. The bi-conjugate gradient stabilized technique is applied to solve the pressure Poisson equation. In particular, the advection term is discretized in a composite difference scheme to enhance the stability of the algorithm. The direct forcing IB method is utilized to deal with no-slip boundary condition, while the VOF method, which employs a piecewise line interface calculation technique and a Lagrange method to reconstruct and update the interface respectively, is used to track distorted and broken free surfaces. The results of this study demonstrate the accuracy and capability of the two-phase model to simulate a moving body in free surface flows while also considering air movement effects.
KW - Fixed Cartesian grid
KW - Immersed boundary method
KW - Moving structure
KW - Nonlinear free surface
KW - Two-phase flow model
KW - Volume of fluid method
UR - http://www.scopus.com/inward/record.url?scp=84887126205&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2013.09.010
DO - 10.1016/j.oceaneng.2013.09.010
M3 - Article
SN - 0029-8018
VL - 74
SP - 107
EP - 124
JO - OCEAN ENGINEERING
JF - OCEAN ENGINEERING
ER -