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With the increasing demand of oil and natural gas, the FPSO with LNG tanks was proposed as a popular type LNG platform. Equipped with liquid natural gas so that the tanks has free surface during the operation, FPSO will suffer from sloshing forces and moments from inner tanks. At the meantime, the sloshing flow in tanks is influenced by the ship motion in return. This paper applied numerical methods to study the coupling effects between FPSO and sloshing tanks. The coupling effects were solved in CFD method, using our in house solver naoe-FOAM-SJTU, based on open package toolbox OpenFOAM. The outer field and inner free surface were both simulated by solving Navier-Stocks equation thus the ship motion and sloshing tanks were fully coupled. The two LNG tanks were in different filling conditions, and the sloshing forces and moments were considered in current study.

 

FPSO LNG; sloshing; naoe-FOAM-SJTU solver; fully coupled analysis