Application of a Two-Fluid Finite Volume Method to Ship Slamming

1999 ◽  
Vol 121 (1) ◽  
pp. 47-52 ◽  
Author(s):  
P. C. Sames ◽  
T. E. Schellin ◽  
S. Muzaferija ◽  
M. Peric
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
North Atlantic ◽  
Water Entry ◽  
Computational Method ◽  
Ship Slamming ◽  
Bow Flare ◽  
Wave Conditions ◽  
Volume Method

A newly developed finite volume method was applied to ship slamming. The computational method accounts for arbitrary free surface deformations and uses unstructured grids for the discretization of the domain. A linear panel method was used to predict motions of a modern 2400 TEU container ship. Resulting relative velocities at the ship’s Keel were used to estimate the maximum vertical re-entry velocities at the bow in North Atlantic wave conditions. Water entry of three bow in North Atlantic wave conditions. Water entry of three bow sections was numerically simulated to determine pressures at the bow flare. Prescribed vertical velocity histories significantly affected the determination of realistic pressure levels.

An Essentially Nonoscillatory Spectral Deferred Correction Method for Hyperbolic Problems

2016 ◽  
Vol 13 (03) ◽  
pp. 1650017 ◽  
Author(s):  
Samet Y. Kadioglu
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
Fourth Order ◽  
High Order ◽  
Computational Method ◽  
Hyperbolic Problems ◽  
Discontinuous Solutions ◽  
Order Of Accuracy ◽  
Volume Method ◽  
Essentially Nonoscillatory

We present a computational method based on the spectral deferred corrections (SDC) time integration technique and the essentially nonoscillatory (ENO) finite volume method for hyperbolic problems. The SDC technique is used to advance the solutions in time with high-order of accuracy. The ENO method is used to define high-order cell edge quantities that are then used to evaluate numerical fluxes. The coupling of the SDC method with a high-order finite volume method (piece-wise parabolic method (PPM)) is first carried out by Layton et al. [J. Comput. Phys. 194(2) (2004) 697]. Issues about this approach have been addressed and some improvements have been added to it in Kadioglu et al. [J. Comput. Math. 1(4) (2012) 303]. Here, we investigate the implications when the PPM method is replaced with the well-known ENO method. We note that the SDC-PPM method is fourth-order accurate in time and space. Therefore, we kept the order of accuracy of the ENO procedure as fourth-order in order to be able to make a consistent comparison between the two approaches (SDC-ENO versus SDC-PPM). We have tested the new SDC-ENO technique by solving smooth and nonsmooth hyperbolic problems. Our numerical results indicate that the fourth-order of accuracy in both space and time has been achieved for smooth problems. On the other hand, the new method performs very well when it is applied to nonlinear problems that involve discontinuous solutions. In other words, we have obtained highly resolved discontinuous solutions with essentially no-oscillations at or around the discontinuities.

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