...
- Use the initial state.
- Add a "Drag Force" and animate its "Strength" from 0 to 50 over 100 or frames.
- Add a "k Speed" daemon and animate its "Max speed" from 100 to 0.01 over 100 frames; activate "Limit & Keep", because the particles should not be deleted.
- Simulate for 100 - 150 frames. Then create another initial state for you your next simulation pass.
- You might still observe some motion, but in most cases the fluid will be calm enough.