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Questions tagged [fluid-simulation]

Questions about the Fluid simulation systems in blender. Blender has two systems for simulating liquids, a SPH (Smoothed Particle Dynamics) system integrated with the particle system, and a Lattice Boltzmann method which can be used create a variety of simulations.

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Blender Gas Fluid Sim Freezes Mid-Bake Randomly [closed]

So I'm trying to run a bake for a fluid sim. Pretty low quality, mostly just testing, and it starts baking fine at several FPS... until it suddenly doesn't. It freezes on random frames, anywhere from ...
Bill's user avatar
  • 51
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0 answers
14 views

Slowly rendering [duplicate]

I'm new to animation in Blender, my projects take a few days to render even if my PC isn't stressed. My configuration is not bad: RTX 3070/I9/64 RAM. I started doing a liquid simulation too and it ...
Hintii's user avatar
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-2 votes
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24 views

How do I create a realistic waterfall using Flip Fluids?

I'm trying to create a waterfall like this example from adobe stock. Specifically I'm struggling to get turbulent water and white water mist. Out of the box, blender fluid simulations seem to stream ...
nicholas's user avatar
1 vote
0 answers
22 views

Simulation of water in a bottle

how do I do a simulation of water in a bottle. So that it turns over there relative to the position of the bottle. Thanks)
Паоло Карвацький's user avatar
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18 views

Possible to make a roche limit simulation?

I would like to create a simulation of the Roche Limit. I have already given it a crack using simulation nodes but it's not ideal. I'm currently using SpaceSim to visualize it. But I want the ...
TheJeran's user avatar
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How can I make a completly simple powder simulation, without any extra effectors but just a plane and the powder?

I was searching too long for a totally simple tutorial on how to make a powder simulation. I just need a picture of it, of how the powder is on the ground and completly still like this: But any video ...
2sa2's user avatar
  • 13
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1 answer
24 views

Weird shadow in water simulation

I have made a water simulation but it has a weird shadow that depends on the positon of the viewport "camera". I have no lights apart from the HDRi and adding lights don't change anything. ...
Akut Luna's user avatar
  • 275
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53 views

Render liquid fluid simulation scene with low disk space

I have a fluid simulation with particles enabled Each frame of fluid simulation takes about 3 GB of disk space at a low domain resolution, with the majority caused by ...
xgjxcxzk's user avatar
  • 173
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1 answer
28 views

Where can I find the algorithm that Blender uses for dynamic elements (physics)?

I need algorithms like DEM, IBD, MSS, SPH. I know these are used, but where can I find more about them? My thesis is about comparing these elements in Blender and Houdini, but I need a site where I ...
Dávid Czvedler's user avatar
2 votes
1 answer
150 views

Wind tunnel simulation (laminar flow)

I’m having some troubles with smoke simulations in Blender. The one you can see here was made by Kev Ryan in Houdini, and I wanted to know if you think it is possible to recreate the same effect in ...
Davide Margottini's user avatar
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18 views

What's an appropriate fluid simulation configuration for a 10,000 kilometre body of water?

I want to model a geological disaster which will disrupt an ocean 10,000 kilometres across, and up to 2,000m deep. (Yes, it needs to be simulated all the way to the bottom.) I know the 3d data ...
spraff's user avatar
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Fire simulation casts light with weird holes/shadows in it. How can I fix this?

This project uses a shadow catcher to catch light and shadows and is composited onto my footage. I'm using adaptive domain (though I tried a low res bake with no adaptive domain, that just killed any ...
Braedon Rogers's user avatar
2 votes
1 answer
180 views

Why is my liquid simulation not showing?

I have applied the fluid in physics property but the liquid doesn't seem to be showing. Did I overlook something or is there something wrong with my model?
Codeblues6's user avatar
0 votes
1 answer
42 views

fluid particles do not fill boundaries of the mesh

i'm trying to fill "pools" with water particles ( fluid ) to make a splash simulation with fluid. My problem is that the mesh i use is not filled entirely resulting in empty borders between ...
ant0's user avatar
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0 answers
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Is it possible for a mesh to move by fluid simulation?

As stated in my question, pretty much it. I have a mesh, I play the simulation, and want the fluids to move the objects in the field. Is that possible?
ahkai's user avatar
  • 67
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9 views

my baked fire simulation is floating with a super small scale

I basically have a ecosphere emitting particles and I added a fluid simulation (fire + smoke, inflow) to that ecosphere with the flow source as a particle system so it could follow the particle system,...
Dante's user avatar
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1 vote
1 answer
25 views

Creating a thrown snow ball

I want to create a snowball in Blender. I've searched on YouTube, but couldn't find any tutorials on making snowball effects. My plan was like this: I put Fluid physics on a UV sphere and set the Flow ...
구원자's user avatar
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32 views

Particle system as fluid effector

How can I have particles from a particle system be a fluid effector? I have: plane: emitter particle system with physics --> fluid --> type effector collision icospheres: instanced particles (...
xgjxcxzk's user avatar
  • 173
1 vote
0 answers
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When I move the liquid-filled container in the liquid simulation, the liquid decreases

I animated a liquid-filled container. During movement, the liquid does not overflow or spill, but there is an extreme decrease in the liquid level. I tried various settings but couldn't find a ...
Sirozikas's user avatar
2 votes
1 answer
36 views

How to render particles from a FLIP fluid sim

I've created these FLIP particles: Instead of meshing them, I'd like to simply render them as halo particles (or instance geo on them if necessary). How can I go about that? Now when I hit render, ...
Anson Savage's user avatar
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0 votes
1 answer
165 views

Viscosity setting not showing in blender 4.1

I'm trying to work with fluid simulation in Blender 4.1, but I can't seem to find the option for viscosity. I've looked through the physics settings, but it's not clear where I should adjust viscosity ...
Abu Aliyu's user avatar
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1 answer
31 views

Repeating fire-simulation continuously without keyframes

I did alot of desperate research, but couldn't find anything helpful; here is my problem: I rigged my v8-engine, assigned some materials, but now it's time to simulate the internal combustion. I am ...
Philipp's user avatar
4 votes
1 answer
159 views

Fluid sim animation timing; must wait for many frames for 'water' to fill stream

Working with a fluid sim of water flowing in a stream. All is working well except I have to wait for about 200 frames before the water makes it all the way to the end and reaches a stable point where ...
Jon's user avatar
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44 views

Why would a simulation nodes setup stop simulating after a certain length of time?

I've got a fluid sim running in simulation nodes (based on Bad Normals' setup). I need it to work for quite a long time (around 5000 frames), but I've noticed it currently stops moving the particles ...
Nickh129's user avatar
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18 views

get angle between sun and face normals

I am trying to use python to compute the solar intensity on each face. for that I need to compute the angle between sun radiation and face normal. This is my code. it gives the correct angle or some ...
yanisk's user avatar
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0 answers
21 views

water separates into small droplets

I'm doing a project where a glass is tipped over and the pan pours out of it. I want to make it as similar as possible, but at a certain point the water just starts to separate into small drops and it ...
Blend_Sueta's user avatar
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0 answers
22 views

Particle objects interact with fluid simulation

I am new in blender , I wanna know if possible to create particle objects or objects that will look like a silt and will interact with water simulation?
Cj Pascual's user avatar
1 vote
1 answer
39 views

How to control fluid flow speed / velocity

I'm new to Blender, and I'm having trouble regulating the water's speed from the sphere while using water simulation. I want the water to start flowing at 35 litres per minute and stop after 25 ...
Cj Pascual's user avatar
1 vote
1 answer
54 views

How to make the liquid to flow in a circle forming a swirling bubble

I tried to make it as natural as the gif, but I still feel like I'm not good enough. The liquid I expressed is not three-dimensional, so please help me
smileman's user avatar
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0 answers
42 views

What settings should I use to replicate this "lava" effect using flip fluids?

https://www.youtube.com/shorts/p3OhspLdgdU I want to replicate the emission strength fading according to speed like in the video. Additionally, I am trying to figure out how to go about having the ...
yanke555's user avatar
0 votes
0 answers
11 views

Model clouds tablecloth with animation

I wanted to create animated clouds to position over a mountain footage. I want to achieve this effect: https://www.youtube.com/watch?v=zOpkXBACDU4&t=9s How can I do it? Thank you
Haru Shiba's user avatar
0 votes
1 answer
40 views

Smoke Won’t Stop Emitting When “Use Flow” Is Unchecked

I don’t know what information to give. I set a key frame with “Use Flow” checked, then I add a key frame on the next frame, with “Use Flow” unchecked. The properties tab show that it is unchecked, and ...
Koast's user avatar
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0 votes
0 answers
13 views

how do i scale inflow stream

i am in the middles of working on my project, in which call for the person to be in the shower, as in bathroon shower, and in working to get the water strean to look like water coing out of a sjower ...
Kiss Me Comix's user avatar
2 votes
1 answer
65 views

Baking numerous simulations using FLIP FLUIDS

I'm encountering a challenge with my current project involving fluid simulations using Flip Fluids. I need to run multiple simulations within the same blend file for different shots, each at distinct ...
Default_dx's user avatar
0 votes
0 answers
11 views

How to free a fluid bake on the commandline?

I want to rerun the fluid bake. I'm using the code at https://blender.stackexchange.com/a/311453/158745 to bake the fluid, which seems to work. I try a variation on this code, to free the fluid: ...
Hugh Perkins's user avatar
1 vote
1 answer
42 views

Why do fluids clip through effector after enlarging domain

Summary I created a basic rocket thruster via two planar inflows (smoke and flame) housed inside of a non-planar cylinder/cone effector (set to collision). The animation is fine with a smaller ...
Celery's user avatar
  • 11
2 votes
1 answer
32 views

Fluid inflow simulation won't stop overflowing even after using keyframes

So I was watching this YouTube tutorial that keeps the fluid animation going while stopping the flow from overflowing at a certain point, using keyframes. Following exactly what they did, as you can ...
sally's user avatar
  • 21
0 votes
1 answer
34 views

how do i remove the background in a transparent material

i am working on a water simulation i am using evee, and not cycles as the scene doesn't require that much refinement, i have trhe transparecny figued out i think, how do i get rid of theforest back ...
Kiss Me Comix's user avatar
0 votes
0 answers
18 views

How to create a turbulent fluid particle simulation that is reactive to regid body simulations?

Reference Video I am not able to understand what kinda approach would be more accurate to recreate the reference video above [particle system or fluid simulation]. From what i understand a particle ...
Tejas's user avatar
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1 vote
1 answer
32 views

Fluid stream not really straight with spherical artifacts when increasing velocity

So I'm modelling a water fountain and currently I working on adding some water in the form of a Blender Fluid Simulation. Everything looks more or less as expected except the water stream coming from ...
Asder Knaster's user avatar
0 votes
0 answers
25 views

My fluid inflow doesn't stop even after animating it keyframes (useflow) to stop

I have been learning blender for 2 months now, I get stock at this point where I am finding it very difficult to animate a running fluid from the flow into the effector Pls can someone explain how to ...
Ik Isaac's user avatar
0 votes
0 answers
31 views

liquid simulation that sticks to a surface effect

I've been trying to simulate a golden metallic liquid that originates from a golden mask. I have almost got the simulation ready but I cant seem to find any setting that makes the liquid stick to the ...
Caynite 's user avatar
0 votes
0 answers
23 views

How to make the bubbles that form in the top of the liquid in the inner edge of the loquid container? [duplicate]

How to make this for a liquid object that forms bubbles in top of the liquid? I'm stuck in a project just for this
Gaurav Kumar Das's user avatar
0 votes
1 answer
31 views

Particle System Halos vs Objects

https://drive.google.com/drive/folders/1fVd1osF-ZCLDb2eGdjVZdMulcxZhDndr?usp=sharing Does anyone know why this is happening and if there is a solution? When I start the particle system and the default ...
ahkai's user avatar
  • 67
0 votes
1 answer
44 views

Liquid gets less/vanishes if effector is rotated in animation

I am experimenting with liquids in an animation, but I don't get it to work properly. I have an simple container, liquid flows in. Then it rotates so the collected liquid should be able to flow of ...
Heiko Schäfer's user avatar
0 votes
0 answers
57 views

How to add vector blur for particles produced by Mantaflow?

I'll briefly explain my setup here: I am trying to render an animation including sand movement produced by a falling object. I have made the simulation using mantaflow as a source for the particle ...
Mehdi Belhous's user avatar
0 votes
0 answers
66 views

Fluid Simulation Disappearing in Render

Basically this issue here where sphere sometimes just disappears. Although it looks like its reappearing after a few frames thats just me restarting the rendering with overwrite off. Tried once and ...
RipeRed's user avatar
0 votes
0 answers
61 views

Post processing SPH simulation

I’m very new to blender. I just ran a (sph) fluid simulation and want to post-process it in blender to make it look like this: Does anyone have any information which would help me do this? I used ...
Justin H's user avatar
0 votes
1 answer
75 views

What are the technics to create flowing liquid static geometry?

I need to create something like this – chunky & very pronounced liquidy abstract geometry based on a restricted surface. Simply put, I want to create the roof for the cartoon house looking exactly ...
Marfa Razmakhova's user avatar
0 votes
0 answers
21 views

Why does changing the Resolution Divisions parameter in Mantaflow change the scale of the simulation?

My understanding of Resolution Divisions is that it should affect the accuracy/voxel size of the simulation. Therefore a typical workflow would be to start with a lower number of divisions to get the ...
John's user avatar
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