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.

Filter by
Sorted by
Tagged with
0
votes
0answers
37 views

Fire animation doesn't work in small size

I am trying to animate a fire from a cashew nut (dimensions x = 2 cm, y = 1.45 cm, and ...
0
votes
0answers
32 views

Fire is made of square blocks even with relatively high resolution

I've consistently ran into this problem, which makes me almost 100% sure it's something simple that I'm screwing up. I've looked around forums and found people having somewhat similar issues but ...
2
votes
1answer
115 views

How to make a fluid simulation start from the middle of an animation and make the domain not visible until that point?

Using blender 2.9, I am trying to simulate water filling a vessel. I watched to some videos, like this one: https://www.youtube.com/watch?v=1YKDUPEZc1g&t=321s. Note that in this video, the ...
0
votes
1answer
304 views

Can't find smoke and color mapping options for Fluid Simulation Blender 2.9

I am trying to make an explosion with Blender Mantaflow, but I do not see the following in the Properties view in the Physics Properties: Color Mapping Smoke I am using Blender 2.91. Can you help me ...
1
vote
1answer
149 views

why did my fluid change into multi colored spheres?

the fluid mesh is under there but it's surrounded by these spheres
0
votes
1answer
39 views

Mantaflow. Bake Mesh does nothing

I've been trying to find an answer online but it seems like the problem only happens to me :) The fluid simulation works well up until i try to bake mesh. This never results in any mesh, it takes time ...
0
votes
1answer
27 views

2.91 fluid sim, renders w/o fluid

I have a fluid sim that is baked and looks good when I play it, my water flows nicely. When I attempt to render it to png as a series for future image sequence, the water does not even show up. This ...
0
votes
1answer
63 views

Speed up I/O when using cached simulations

I'm experimenting with fluid sims, so I've been baking and rendering the whole day. One thing I've noticed is that the I/O seems to be really slow. Like really slow. I'm only rendering at 30 samples ...
1
vote
1answer
68 views

Possible to bake boolean difference or use “exact” only when “fast” fails?

I am working with a 720 frame animation in Blender 2.91 with a liquid fluid simulation. To make the fluid simulation fit the container, I applied a boolean difference modifier on the fluid mesh. ...
1
vote
1answer
54 views

Simple fluid sim issues, 2.91

I must be missing some basic understanding in the workflow of a fluid sim. If I create a collision object, an flow object (inflow) and a bounding domain object, I would expect I could bake and see ...
0
votes
1answer
31 views

Where is the “Local Coordinates” option for Inflow Object? [duplicate]

I want to use an animated object to determine where liquid pours out from, but I cannot for the life of me find the option that dictates this... Previously this option was in Blender 2.79 So far, ...
0
votes
0answers
26 views

How to use fluid simulation to combine different meshes for 3d printing

I'm trying to 3d print a hollowed version of the bust of a video-game character. The character is very detailed and has meshes for every part of armor and a single eye is composed of 4 different ...
0
votes
1answer
1k views

Fluid sim effector not working correctly

I have a simple fluid simulation set up and, I have an "effector" object that is supposed to be making the fluid collide with it. The problem here is, I've set the effector strength "...
0
votes
0answers
58 views

Visible faces in fluid mesh

Wondering if someone could help me out with identifying where I am going wrong here. I'm running a fluid simulation in Blender (going for milkshake pouring into a cup), I've set the simulation ...
0
votes
0answers
30 views

Liquid Simulation (Domain) changed into a Solid Cube

I have a huge problem. I made this scene already again and again, but in one point something happens to the liquid domain always: the fluid simulation is not working anymore and all I see is a solid ...
3
votes
1answer
140 views

Can I make a sim where “water” breaks a “glass window”?

So I want to make a sim where the camera starts in a hallway and moves towards a window at the end of it where a room is filling with water. When the room gets about halfway full or so i want the ...
0
votes
0answers
45 views

Why do FLIP particles disappear over time?

I have a fluid simulation of a gold bar melting, and it's a thick fluid. To test the size and other parameters of the fluid, I have set all of the cache and rendering to 1000 frames, but by frame 150 ...
3
votes
1answer
68 views

How to do a simulation of still water being affected instead of flowing water

Of all the tutorial videos on water simulation, they're all like water flowing from a point and then settling. How would I do it if I want the start of the animation to be an existing body of water. ...
5
votes
1answer
334 views

Where is gravity settings in 2.91?

I'm trying to find the gravity controls. I need to either turn it off, or change the axis. Everything I have found states its on the Scene tab, but I don't see it at all. but no screenshots, and ...
1
vote
1answer
488 views

How to decrease the size of particle for fluid simulation(2.9)?

I'm following this YouTube tutorials and making fluid go through the pipe. https://www.youtube.com/watch?v=3ChtnI8GNtM When I make pipe very thin (e,g, 0.03m in diameter), then particle size of fluid ...
0
votes
0answers
14 views

Fluid does not interact with imported from GIS buildings (FLIP Fluid)

Fluid does not interact with imported from GIS buildings (FLIP Fluid) Add-on. I want to fluid interact with buildings. Firstly, I baked with 100 resolution, than I decided to bake with 200 and 350 ...
0
votes
1answer
81 views

Fluid simulation not working properly

basically i wanted to create a fluid simulation in which the liquid (soy sauce) pours out of a kikkoman bottle. I've already set up the domain, the flow emitter inside the bottle (tried to use both ...
0
votes
1answer
22 views

Why do the particles in my fluid sim move to the left with no added velocity?

I was setting up a fluid sim and noticed that even with no added velocity or anything like that changed the particles fly to the left. Why is that and how can I fix it? The effectors don't seem to ...
0
votes
0answers
14 views

How to switch fluid domains during animation?

I started learning fluids and domains, and i got amazed at this effect on https://youtu.be/8hpqwfZah08 At 0:36 How can i switch fluid domains during animation? Like Exclude a cube, and them the fluid ...
3
votes
2answers
1k views

My liquid looks like tiny balls not like a liquid

I made a liquid animation. It looks good, but it looks like tiny balls instead of liquid. How can I fix this?
0
votes
0answers
27 views

Blender 2.91 no slip options are gone

There used to be options about the slip conditions for the fluid simulations, such as "no slip", "free slip", etc, but they don't seem to exist anymore. Did blender simply remove ...
0
votes
0answers
5 views

No smooth keys option (for animation) in window

No smooth keys option when I enter fn+f3 (Mac). Photo. Can you help me? Thanks in advance.
1
vote
0answers
19 views

Some ways to affect manta flow with rigid body

While making a lot of fluid simulations, I wondered why Flip Solver, Realflow with flip, can interact with rigid bodies, and mantaflow no. Are there some ways to affect this? Thanks in advance.
0
votes
0answers
15 views

baked fluid object animation speed

In blender 2.9, i have several already baked fluid animation in same scene. Is it possible now to change animation time/speed for each of these objects? I want to animate rain from many identical ...
0
votes
1answer
96 views

Blender [2.91] Liquid simulation not filling container

I am trying to fill a container from bottom to top. I have a cylinder at the bottom that has -3m/s velocity on the z-axis (shooting towards the bottom of the container to get a sort of a splash effect)...
0
votes
1answer
43 views

The liquid does not get into the pipe

The liquid does not get into the pipe. I've tried Is planar off , on Flip Normals and is planar off
1
vote
1answer
326 views

Mantaflow. The liquid just doesn't respect the collision object

Mantaflow. The liquid just doesn't want to properly respect the collision object. I've watched countless tutorials and still can't get it right. Google drive link
0
votes
0answers
18 views

How can we make an solid object being squashed by another, turning the first one into fluid?

everyone. My issue is that I don't know how to make an object splatter another. I have a text appearing on screen like so. I have it recovered by a second text in the same manner. I would love for the ...
0
votes
2answers
433 views

Water simulation hangs over the surface of the collision object

I created a water particles but they seems to hang over the surface, why is this happening? Still the water hangs over the ground even with Collision Surface Thickness zero:
0
votes
0answers
25 views

Water Oscillations in Tipping Tray

I'm trying to create a simulation of a tray tipping backwards and forwards with water inside it, that is oscillating in waves, (like it would in real life). I am a Blender beginner so I have no idea ...
1
vote
1answer
37 views

Liquid not showing after the domain is resized 2.91.0

Every time I try to create smoke or liquid simulation the smoke or liquid dissapears permanently after I resize the domain. I have tried: Applying scale to inflow, domain, inflow and domain; Using ...
0
votes
0answers
48 views

Thick fluid simulation not working in blender 2.9

I've been trying to do thicker fluid simulations, but they don't seem to work. For example, a simulation that has 1 as base and 0 as exponent won't yield any results, it just shows nothing. Then, ...
0
votes
0answers
27 views

Connecting keyframes and physics animation in one scene

I have a liquid physics animation. It animates from 1 to 100 frame. GIF: https://gfycat.com/ru/mixedweeharlequinbug Parallel I want to animate cube with location keyframe. Scenerio is: Cube starts at ...
0
votes
0answers
46 views

How can I increase the amount of frames, but replicate the flip fluids simulation exactly?

I made flip fluids simulation where an object falls into water and makes an interesting looking splash. The simulation is 30 frames long. The objects motion is controlled by key frames one of which is ...
0
votes
1answer
111 views

How do I fix pixelated fluid?

I'm making a water sim and I noticed when I rendered a frame that some of the water reflected the light weirdly, like a square or polygon. The fluid closest to the camera also looks square-ish. How ...
1
vote
1answer
122 views

Fluid goes through effector

So im trying to make a hallway with a light that's a little lower than the ceiling so fluid can flow through the crack but the fluid goes right through it. I have it set to effector. I used the knife ...
0
votes
1answer
444 views

Can't Find Color Mapping for Fluid Simulation in 2.9

I can't find the color mapping option for fluid sim in 2.9 where is it? I go to viewport display in my setting but can't seem to find it. Thanks in advance
3
votes
1answer
160 views

Help with smoke and liquid simulation in Mantaflow

Original Post This is the problem that led me to post this. Whenever I scale the domain of a smoke simulation, the inflow object's smoke also scales up/down. Applying the scale of the domain does not ...
1
vote
1answer
37 views

Liquid lighting artifacts

I am currently working on a slime character splatting onto a branch using mantaflow fluid simulation. I am so close to my desired final look, but the last problem I have is that the lower half of the ...
0
votes
0answers
104 views

FLIP Fluids disappearing in fast moving object

I want to create a dancing glass man with liquid inside him slowly rising using a FLIP Fluid's obstacle. The problem is when the man dances at high speeds, liquid from his body will disappear (see gif ...
0
votes
0answers
14 views

Smoke simulation Dissolve Time(?) error

My smoke simulation is acting as if the dissolve time changes even tho I haven't touched any settings. Some examples below: Frames 142 239 and 351
0
votes
0answers
42 views

Messy/noisy vector pass in cycles with many particles

I'm trying to render a baked particle simulation in cycles with vector blur but the vector pass is very messy resulting in strange vector blur effects. Image pass: Vector pass: Node setup with ...
0
votes
0answers
37 views

How would I cover my animated character in wet, dripping paint?

I have a character that is animated, and I'd like to cover it's body in paint, as if someone poured a bucket of paint over its head. The action of pouring paint does not need to be included, but I ...
0
votes
0answers
28 views

How to I get particles to stay inside their generator object?

So, I am currently working on an animation where a ball of slime falls down onto a branch and partially retains its shape as a ball. I do this using a mantaflow simulation with a cloth physics sphere ...
0
votes
0answers
80 views

“0 Fluid Particles for this Frame”

I am trying to figure out why I cannot see my bubbles, foam and spray showing up in my render where I'm using FLIP to simulate a liquid. I have them all enabled under "Particles", but I don'...

1 2 3
4
5
20