In this paper, the kinematic flow field in geometric similar GTT membrane-type floating liquefied natural gas (FLNG) facilities is investigated. The experiments were conducted in three scaled prismatic tanks at scales of 1/20, 1/40 and 1/60 with sway excitation, and the wave elevations near the two vertical sidewalls were measured. The experimental results demonstrate that the kinematic free surface behavior during a single sway wave impact exhibit non-similarity in the three geometric similar tanks with the same experimental media. It is suggested to perform sloshing model test in the large size model tank in order to evaluate the liquid motion in the real LNG tank.

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