Water entry impact of AUV in LS DYNA ?

28 May 2019 0 7K Report

I'm doing analysis of water entry impact of air launched AUV in LS-DYNA. After solution is done, when I start the animation and AUV touches the water surface it disappears. But if I increase the density of AUV and fluids to any fake but very large value, then AUV doesn't disappear and interact with water. I couldn't find the reason why is it happening ?

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