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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1answer
21 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 ...
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26 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 ...
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8 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 ...
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35 views

Fluid is hanging over the ground - problem [closed]

Water simulation hangs over the surface of the collision object I am writing this again in a new account. Can someone help me? Here it is my project. You can download it and find a solution to my ...
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1answer
41 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 ...
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1answer
17 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 ...
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13 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 ...
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2answers
778 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?
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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 ...
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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.
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11 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.
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12 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 ...
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1answer
26 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)...
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1answer
38 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
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15 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
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17 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 ...
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2answers
88 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:
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0answers
22 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 ...
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21 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 ...
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0answers
14 views

Why is my fluid sims particles not showing up?

Why is my fluid sim not showing up? The particles don't show up in the viewport or renders. I baked the data and mesh, tried remaking the inflow objects, nothing works. How can I fix it? The first 3 ...
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0answers
31 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, ...
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24 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 ...
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0answers
14 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 ...
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33 views

Create Smaller Flames, View Video

I would like to figure out how to create smaller flames, along the lines of a couple candle flames mingled together. View the following link to see what I mean: FireVideo The quick smoke settings ...
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1answer
22 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
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1answer
37 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 ...
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0answers
59 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
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1answer
89 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 ...
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1answer
27 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 ...
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0answers
43 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 ...
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0answers
10 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
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0answers
20 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 ...
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0answers
28 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 ...
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0answers
21 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 ...
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0answers
25 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'...
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19 views

Mantaflow issue: can't stop liquid flow

So I have no idea what's going on but I am following a CG Geek tutorial trying to learn how to make fluid simulations but I've come across a huge issue that I can't figure out. He suggests to add two ...
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1answer
9 views

Liquids flows to weird direction. (It flows toward one area of the domain object)

I'm doing some assignment with Blender to use physics simulation, and I found my fluids are flowing to a weird direction. The fluid was supposed to flow downward, because that is how it usually works, ...
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40 views

Fluid sim not colliding with effector

Okay, a pretty simple problem, you can see the fluid sim is passing through my effector. How do I fix that? So far I've tried flipping the normals, adding and applying a solidify modifier, and ...
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0answers
19 views

Rendering Fluid

Why is my computer not rendering the liquid as we see it perfectly in wireframe view? I try to fill a bottle with water using the fluid modifier. This works correctly, but in render view effectors are ...
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0answers
14 views

Remove the offset thickness from IsPlanar efffector option?

I have a character model which interacts with fluid. The mesh has some holes, but instead of closing these holes, I decided to just use the "Is Planar" option. It works much MUCH more ...
2
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1answer
44 views

water simulation -Move water upward along a slope

I want to make a simulation where water move upward along a topography opposite to what it does under normal gravity. I dont want just to water behave like smoke and go straight upward but to behave ...
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0answers
31 views

Mantaflow : Fire disappears for one frame then comes back

I am currently making an animation of a rocket launch, and I'm using mantaflow to simulate the engine fire. After getting the settings I wanted, I baked it and it looks good, but on several of the 200 ...
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0answers
9 views

Unable to get liquid to flow when on a rotating object [Blender 2.90]

I'm trying to make an animation, imitating a spin-coating process commonly done in photolithography. However, I can't make my liquid spread once my object starts spinning. Any help please? Link: https:...
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21 views

Blender Buoyancy

I was just thinking if there is any way I could simulate buoyancy in blender. What I would need is to simulate debris dropping in the water and some of the would rise to the surface and some would ...
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0answers
18 views

How do I measure the volume of water in a certain area?

I want to make a water simulation where I measure how effective a sea barrier is, and at which angle it should be to the water in order to maximize effectiveness. Since I obviously need a quantitative ...
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0answers
25 views

Trying to Make Zero-G Manipulatable Liquid

I’m basically trying to find a way to control a fluid simulation, or something that looks like fluid, in a way that would allow me to have the fluid follow one point, but still allow it to deform ...
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0answers
28 views

Expanding fluid

Almost all tutorials with fluid have the fluid in gravitational field, so that you can see it splashing around. But is there some way to create a thick fluid coming out of the source and pushing the ...
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0answers
36 views

How to create a liquid meniscus/bridge between two surfaces

I'm trying to model a water droplet between two plane surfaces such that it forms a capillary bridge as soon as the surfaces get into close proximity of each other like in the first figure of this ...
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0answers
24 views

Fluid simulation – change object type

Question: Given a fluid simulation, is it possible to change the 'Type' of a given object, halfway through the simulation? Context: Let's say I have three ice-cubes that are melting. At frame 1, the ...
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18 views

Center fluid particles on source

My fluid particles start quite far away from my source object (see picture). I enabled planar emission otherwise it doesn't work (???). But the surface emission is set to 0. EDIT: The source is inside ...

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