I try simulate fluid solid interaction with SPH-DEM examples, particulary Canelas & Crespo results. In this work, how is gap in boundary and fluid particle?.

Should be 1.5h? and h = 1.2 * sqrt (3 * dp ^ 2)?

I do this but I still have problems between the boundary and fluid condition in the solid that moves.

appreciate you can help me

regards

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## Comments

These days I found a problem with the gap between fluid and floating.

The gap will greatly reduce the accuracy of the calculation results. Only by reducing the dp can reduce its influence, and at the same time, the calculation amount will be greatly increased, the calculation efficiency will be reduced,

Is there a good way to make some corrections to the phenomenon, or why The calculation formula of the gap is 1.5 h, can the phenomenon be corrected by correcting 1.5 to a smaller value,？so that a more accurate result can be obtained in the case of a small amount of calculation.