Vidar Posted November 14, 2023 Share Posted November 14, 2023 (edited) Hey guys! I am doing a FLIP simulation using a moving Flat Tank with Narrowband and I am getting this weird banding/little waves in the new generated particles in the boundaries. Some one have a solution for that problem? I am tying all day without success :C Edited November 14, 2023 by Vidar Quote Link to comment Share on other sites More sharing options...
hannes603 Posted November 15, 2023 Share Posted November 15, 2023 Maybe disable the boundary Layer and try again ? For me its hard to reproduce... Quote Link to comment Share on other sites More sharing options...
Vidar Posted November 17, 2023 Author Share Posted November 17, 2023 (edited) On 11/15/2023 at 7:38 AM, hannes603 said: Maybe disable the boundary Layer and try again ? For me its hard to reproduce... Hey Hannes! Just found the problem. It was the gravity force, gravity was compressing the particles when they are created, making the banding. I increased the substeps and the problem got less noticiable, but not totally resolved. I ended simulating the whole domain :/ I will return to that problem later for debugging. If you want to replicate, try add some gravity force to your setup. I will do a clean HIP with the problem and post here later too. Thanks for the quick response! Edited November 17, 2023 by Vidar Quote Link to comment Share on other sites More sharing options...
hannes603 Posted November 20, 2023 Share Posted November 20, 2023 Cant reproduce . if you could look at my scene. Wat do i miss ? Flip_water_moving_container.hip 1 Quote Link to comment Share on other sites More sharing options...
Vidar Posted November 21, 2023 Author Share Posted November 21, 2023 (edited) On 11/20/2023 at 6:20 AM, hannes603 said: Cant reproduce . if you could look at my scene. Wat do i miss ? Flip_water_moving_container.hip 882.58 kB · 2 downloads Hey Hannes! How are you doing? I reproduced the problem in that uploaded HIP, but in a another node. Looking at your scene, the scale of the overall simulation and velocity that the boundaries moves plays a big role in the banding effect. If you turn on/off that gravity force, you will see the banding effect. Thanks in your interest in helping me! Flip_water_moving_container.hip Edited November 21, 2023 by Vidar Quote Link to comment Share on other sites More sharing options...
hannes603 Posted November 22, 2023 Share Posted November 22, 2023 (edited) Flip_water_moving_container_fix_substep_gas_blur_limit_stencil.hipyou container moves realtivly fast in comp to the scale . 1. slow it down or 2. increase substep or 3. use gas blur with stencil field to blur the borders vel like in the scene. or 4. use filtering in particle fluid surface node .... hope that helps a bit Edited November 22, 2023 by hannes603 Quote Link to comment Share on other sites More sharing options...
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