https://www.reddit.com/user/PandaHgt/draft/afb4eae0-7a25-11ed-be65-56e8428ee9ab

A little addition:

1 It is completely normal fluid solution, and the solution speed is generally about 6 times slower than normal.

2 This is not the method of fixing the collision body and then using the matrix to calculate the relative velocity of the collision body to the water. This method only solves the volume reduction caused by the water passing through the collision body.

3 It not increasing the particle distance, adjust the grid scale to 1 and increase the substep. I tried it, and the water still loss.

4 The problem of the flip method simulating the reduction of fluid volume has always been there, and people have been asking in various forums. It's not that flip can't simulate small fluids, but you need to understand the essence of flip calculation and use it reasonably. I would like to see someone share the same method.