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Found 35 results

  1. Hi, I have seen this posted a few times but no clear explanation on how to get it up and running. I created a simple drop of water with a small crown and a single drop on the top. its client likes it but when I up rez it, the simulation changes. is there a way to up rez and the simulation not change. need some help, please.
  2. Flip Fluid not filling container

    Hey all, I am relatively inexperienced with Houdini and very new to Flip Fluids and having some issues with my simulation. So I have created a container, which I would like to fill with a fluid. I am trying to make it so that the fluid flows into the container and half way down interacts with some text. For this I have placed a static object around a particle emitter and the text is also a static object. While the fluid does flow the particles emitted disappear and so the container doesnt fill. I tried to mitigate this by using a larger particle emitter source but this hasnt really worked. Any one have any suggestions as to how I can make this container fill. I would also like to slow down the velocity of the flow and increase viscosity if anyone could help that would be great. Cheers Alex 190903_Animated_Logo.hipnc
  3. Hi there everyone. I have this very Unique issue that is both on Windows 10 and Linux (Mint 19.1, Ubuntu 18.04, fedora 29 and 30) where I will run a Simulation (Pyro, Particles or Fluids) and it will say Complete but only do 159/600 frames. The number of frames it dose is random and could change from sim to sim. System specs: CPU - Threadripper 2970WX (29 Cores - 48 Threads) RAM - 128GP of 2666 Corsair Vengeance LP SSD - 2TB, 1.7TB Free SPU - 1200W Cooler master Motherbaord : MSI Gaming Pro Carbon AC Houdini 17.5 Latest Build. Its not a Ram or CPU issue, I Rand them together at full Load in Prim 95 for 10 to 15 min and it was fine, no Hick ups or Heat issues. Things I have tried include changing the GPU from AMD to Nvidia (Yes removed the drivers to install Nvidias) Changed to an HDD, removed Performance boost in the BIOS, I reinstalled the latest Bios as well. I feel like its a Timing issue. Something is Causing the Sim to Complete, its like the write to disk is taking to long or something because if I lower the Res of the Flip sim, it will complete the cache but the result is to cores for a final portfolio piece. Please, Any Advice would be Greatly Helpful.
  4. Hi guys; I would like to learn about how to use Ocean tools + Flip FLUID to create a scene like " Whale jump ", so I started with a very basic scene like a sphere jumping out of ocean... In ocean shelf tools I tried "Guided ocean layer". It works fine, but 1) I don't know how could I expand the ocean surface without expanding flip tank. 2) Ocean if a flat surface, but Flip Fluid makes a thick mesh and I just need the surface of it. Thanks. OceanAndFlipFluid_01.hip
  5. I have a simple setup with rbd packed objects falling into a flip fluid. Maybe my solver order is wrong but when the objects hit the flip fluid the liquid explodes with so much force.. Ive uploaded my file. How do I make it so the the objects hit the liquid in a natural way and sink to the bottom. Also, Ive been noticing some other issue, the more packed objects are emitted over time, the flip fluid starts spawning extra random particles out of thin air? Thanks! melt_v03_11.hip
  6. Hi, I'm trying to make two flip fluids interact with each other, but it doesn't work so far. Also, I would like to assign different colors to these liquids. flip_test.hipnc
  7. Hi friends, I've been searching for this for a while but have come up empty handed. Is there a way to create a collision detection (frame) attribute for flip fluids. I am currently developing a splash element that requires the colliding particles to emit smaller splashes upon collision similar to what you see in this clip. The kicker is, I am doing this without a tank and hence cannot use something along the lines of a crown splash. I plan on taking the frame the flip particles collide with a surface, and copy stamp instance geo to those points and then emit through another flip sim. It sounds complicated and it has become so as the element takes shape. I would attach a file but the project is under non disclosure. Any help would be greatly appreciated. Thanks in advance.
  8. Flip fluid ptnum changes over time

    Hello, I would like to interpolate the points of a flip fluid to test the slow motion. The problem is that the ptnum of each point changes over time. Do you know how to fix this problem? Thank you very much, Brice
  9. I want to do super slow motion of cheerios falling into milk flip fluid. When I change Scale Time from 1 to 0.1, some of the collisions cause explosive behavior. Someone suggested I write out the sim files with Scale Time set to 1, but substeps increased. Then read the sub stepped sim files as if each was a frame. It appears to work, but I'm getting some flickering in the flip fluid. https://drive.google.com/file/d/17zJgRw7DtQ3W-gqnCiHXpcvGSQDxORGw/view?usp=sharing Any ideas how to fix? thanks
  10. Here is an RBD of tori falling into a flip fluid, with Scale Time at 1. https://drive.google.com/open?id=1CZRguzia-uBbav6sb6Ln4zxRYnAOJbdf [drive.google.com] Which appears to be working fine. I want to do a slow motion version. So I tried reducing the timescale setting on the dop network. Here is the same sim with simulation timescale set to 0.1: https://drive.google.com/open?id=1WPEO83YnrD_QMa1uj5RRYLwMPoYaHgYR [drive.google.com] It appears to be mostly working. However, you'll notice that some of the tori explode later. And the flip starts to flicker towards the end. Any ideas why it's doing this? How to fix? thanks
  11. Hi there. I've got a basic thick viscous flip fluid simulation, problem is when it interacts with an Alembic with many holes the fluid seems to jitter alot and the sim seems to splash outwards. I reckon this is because of the change in the polygon count? This is my Hip file and the Alembic (hopefully not to big to be on this forum) if so I can upload it to dropbox. Hope you can help me out with this one. (also added a clip) Thanks, Y Fluid_sim_Test7.hip testAlembic3.abc JitterProblem_01.mp4
  12. I'm currently doing a flip tank sim with a boat as an RBD object and getting it to float. I have the floating part working, however the boat fills up with water through its hull. The odd thing is that inside mesh there are no particles. Particles collide with the outside of the boat mesh and the inside, but its as if the flip fluid particles go through the mesh. I have tried alternate collision methods under the rbd object collisions tab, but still cant work out how to stop the particles going through the mesh! Does anyone have any ideas of how to stop this?
  13. Good morning everyone! Somebody knows how to prevent the flipfluid to stretch over the pop curve force? As the liquid goes through the pop curve force the fluid stream stretches along and become 2 or 3 more stretched, have a way to maintain or control this stretch and create a uniform stream? Thanks! Felipe
  14. combine flip objects

    Hey There, Hope this message finds you well. I'm after a bit of help in regards to flip fluid interaction, I want two different flip objects to be able to interact with each other, within the same solver. this is what i have already. I can achieve interaction by combing the points within the same flip object, but i need to bee able to mesh each flip object separably. any help would be most appreciated TEST_BUUBLE_02.hiplc
  15. Hi All, It's quite old and well-debated problem, and I followed most of the techniques available on the net, but didn't find the answer. So Please forgive if asking this again annoys anyone. When exporting changing topology from Houdini to Maya, Arnold doesn't read MB data. Is there any way to make it work without SOUP. An example file for export setup would be a great help. Thanks
  16. Hi There, Hope all is well, I've filled an object with points, I'm then importing in to dopnet using a sorucevolume sop. The problem I'm having is it creates a continuous stream of particles, I've disabled reseeding, i just want to use the particles I've generated and not a continuous stream. Any advice would be great Thanks for your time sam HOURGLASS.hiplc
  17. Hello to all... I have a scene where I have animated geometry written out and I bring it back in via a file sop. The animation is just of some rocks flying up in the air flying down inside some water. I'm using a vdb from polygons on the file and I'm bringing that into the dop network as a static object with the mode set to Volume Sample and pointing to the object in the proxy volume field . The problem I run into is when the rocks collide with the fluid, the fluid collapses. I can remove the proxy volume and reset the mode to ray intersect and things will be fine....I have tried to explore on how to fix this but I can't seem to find the solution... does anyone have any ideas? I can upload the scene later if needed. flip_tests.hipnc
  18. i have a problem with the splash that comes from collision object into the flip fluid ,i created a flat tank and i imported a strawberry obj and make it to Hero RBD with volume collision , bu tas you see the splash is too weak and the feedback of the fluid jumping after the collision is too high, and i got tired trying to solve it to look realistic particle separation : 0.045 = almost 10 mil density of the fluid : 1100 collision feedback scale : 0 collision force scale : 1 viscosity of fluid: 35 surface extrapolation: 0.001 velocity transfer: swirly kernal surface tension: 10 vorticity : on preservation rate: 0.1 use friction and bounce in solver is off Dop SUbsteps : 2 falling strawberries density : 100 solver type = RBD Houdini version : 16.0.621 hip file included + obj strawberry will be thankful if anyone helped me reference splashes: in this video the reference for the jumping fluid after the collision in the youtube video ate the 0:17 just a simple splash close to crown splash Chocolate_sim.rar
  19. FLUID FORCE NODE

    Hello! Do some of you sometimes use Fluid Force node? I want to have my fluid having influence on meshes, and I cannot manage to set the node properly. If you use another method for this, I would be happy to learn it. Thank you! leafNdrop.hip
  20. Running a fluid sim over geometry

    Hello! I was wondering if anyone knows a way to run a flip simulation over specific geometry. The closest visual reference I can think of would be the workflow from Moana. Would you have to turn the geometry in to a fluid object, or is there some way to have the simulation run on top of the geometry?
  21. Daredevil Effect

    Hi, I'm trying to do an effect base on the tv series daredevil. This is as close as I can get. Is there anyway that I could make the flip more detail in terms of following the detail of the object? testvisco.avi
  22. Simulation Strategies

    Hello! I was wondering if some of you had a strategy to render high resolution simulations. For exemple, to render a high resolution smoke, can you render at a low resolution multiple times? Thank you!
  23. I can't work out why the particles are blowing up within my scene. I've changed a lot of a lot within the scene such as: scale, particle separation, collision data but nothing seems to stop this from happening. The file attached is my project. Thank you! pirate.zip
  24. I am having two issues here. One, I am unable to figure out how to cool down the system so that when the lava hits an object it begins to cool down. My second issue is how do i make the particles smaller? right now i have large balls that are fairly visible when the lava hits the rock surface. Please advise how i can fix these issues. Thank you for your time and consideration. lava_smoothing_004.hipnc
  25. Hi everyone, how can this two have collision relationship with each other? I thing this is really simple, but I can't solve this Drops_Collid.hip
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