Thanks for the new release, very exciting. I have modified the example with flow over cylinder a bit, and I think I found something less optimal:
Instead of a cylinder I placed a rectangle covering 3/4 of the width of the channel, and the problem I observe is marked with yellow that the particle density is getting scarily low. This might be in connection with the second problem I observe which is that suddenly back flow occurs due to rotation of fluid:
Which of course can be solved by making the channel longer, but then I get a a very high amount of particles. Has anybody found another fix for this situation?