MPS-FEM coupled method for sloshing flows in an elastic tank

Prediction of wave-induced loads on ships: Progress and challenges

Fluid damping in rectangular tank fitted with various internal objects – An experimental investigation

The global demand of liquefied natural gas (LNG) has risen rapidly in recent years for the reasons of energy security and sustainable development. This has led to considerable recent research interests and efforts in the LNG production chain and associated risks in handling, storage, and transport of LNG, largely driven by the intrinsic process safety issues of LNG, potential terrorist threats, and public confidence in LNG safety. This review presents an overview on some recent advances in the LNG value chain, covering upstream gas production and gathering, liquefaction, shipping, and regasification processes. Recent developments in the experimentation and modeling of LNG spills associated with the LNG value chain are then summarized, covering the events following a LNG spill, including LNG pool formation, vapor dispersion, and combustion. The consequent hazards and safety issues are also discussed, with a focus on the methods for improving the safety of personnel, facilities, and ships. The key technical...

Some Recent Advances in Liquefied Natural Gas (LNG) Production, Spill, Dispersion, and Safety

Coupled analysis of nonlinear sloshing and ship motions

A 3D fully coupled analysis of nonlinear sloshing and ship motion

Influence of Various Internal Components on Slosh Dynamics: A Study Using Finite Element Method

In the present study a novel modeling approach is presented to solve the combined internal sloshing and sea-keeping problem. The model deals with interesting effects arising due to the coupled interaction between the sloshing in partially filled containers of several geometries and the ship motion. The study is very important for the liquid cargo carrier operating in rough sea or under different environmental conditions. The resulting slosh characteristics that include transient pressure variation, free surface profiles and hydrodynamic pressure over the container walls have been reported in this study. In addition, the effects of coupled ship response and sloshing on ship motion parameters have also been investigated. The equations of motion of fluid, considered inviscid, irrotational, and partially compressible, are expressed in terms of the pressure variable alone. A finite difference-based iterative time-stepping technique is employed to advance the coupled solution in the time domain. Several parameters of interest, including the container parameters, level of liquid, thrusters modeling and some important environmental factors are investigated.

A fully coupled ship motion and sloshing analysis in various container geometries

Sloshing is a potential source of disturbance in liquid storage containers. Sloshing flow in ship cargo is excited by ship motion, but the sloshing flow itself affects the ship motion in return. This paper investigates the coupling effects of ship motion with fluid oscillation inside three dimensional rectangular containers using a newly developed time domain simulation scheme. The method has been applied to a number of problems and some typical results are presented that assess the accuracy and applicability of the method.

A Study On Complicated Coupling Effects of 3-D Sloshing In Rectangular Tanks And Ship Motion

A finite element based numerical method is employed to analyze the wave radiation by multiple or a group of cylinders in the time domain. The nonlinear free surface and body surface boundary conditions are satisfied based on the perturbation method up to the second order. The first- and second-order velocity potential problems at each time step are solved through a Finite Element Method (FEM). The matrix equation of the FEM is solved through iteration and the initial solution is obtained from the result at the previous time step. The three-dimensional (3-D) mesh required is generated based on a two-dimensional (2-D) hybrid mesh on a horizontal plane and its extension in the vertical direction. The hybrid mesh is generated by combining an unstructured grid away from cylinders and two structured grids near the cylinder and the artificial boundary. The fluid velocity on the free surface and the cylinder surface are calculated by using a differential method. Results for various configurations including the cases of two cylinders and four cylinders and a group of eighteen cylinders are obtained to show the joint influences of cylinders on the first- and second-order waves and forces, including the effects of spacing ratios and wave frequency on the second order waves and the mean force, in particular.

S. Mitra

Papers

A 3D fully coupled analysis of nonlinear sloshing and ship motion

Influence of Various Internal Components on Slosh Dynamics: A Study Using Finite Element Method

A fully coupled ship motion and sloshing analysis in various container geometries

A Study On Complicated Coupling Effects of 3-D Sloshing In Rectangular Tanks And Ship Motion

Finite element analysis of second order wave radiation by a group of cylinders in the time domain