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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Can smoke have collision with an object created using the array modifier?

I have some objects created using the array modifier that I'd like to act as collision objects in a smoke simulation. I know that I could apply the modifier to make the object instances real, but is ...
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Blender 2.9 Fluid Domain not disappearing

I am using blender 2.9, and when I try to make a fluid domain, it does not disappear. I have tried everything, from changing resolutions, to extruding the outflow object, everything. I've checked the ...
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Water simulation that people use for product advertising

I was working with 3D beverage before and I want to learn to make this flowing water and splash like this. well, is it possible to make flowing water with good result like this using blender water ...
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1 answer
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I want to change my fire simulation's background from black to white

Basically, I want to change the background color from black to white in my fire simulation. But when I change it from "World" settings the details are lost. I'm new at blender and I know I ...
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1 answer
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The domain cube is visible in render

The domain is visible at 64 and 182 domain voxel res. The cube object properties is set to wire view and they physics sim is baked. Compositing is set image->image. here is the file.
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Blender fluid simulation liquid particles leaking

I am trying to make a fluid simulation and the particles keep leaking out at the side of the biggest box. I have tried adding surface thickness, the particles stop generating after certain amount of ...
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why liquid domain is visible? [duplicate]

I am new to blender and I followed a tutorial on how to do fluid simulation and everything was perfect and did the animation and it was so good, and I was about to render the animation but it was ...
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4 votes
1 answer
276 views

How to create a simulation in Geometry Nodes?

In the recent week the Blender community became crazy on the particular geonodes hack, that allows you to create a simulation in Geometry Nodes alone: NENGHUO on Youtube: Breakthrough! !" For ...
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Trying to have smoke sim react to domain that is not a cube :(

I'm relatively new to smoke sims, and I have this missile that I want to leave the bay doors and I want the smoke to come up out of the bay and crawl across the ground, however when I bake the ...
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cant use liquid simulation (mesh) - it is always solid

I try to follow multiple tutorials and it doesn't work for me. I've created domain, and flow, on every tutorial - whey they check (on domain) that it is a mesh - the domain solid shape disappears and ...
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1 answer
141 views

How to keep fluid simulation level from rising

I'm trying to make a fluid-water simulation, where the ball (effector) comes from underneath the water, penetrates through the water and makes a major splash. But once the effector comes through the ...
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How to make liquid simulation from flat surface to eruption

I'm trying to figure out, how it's possible to make a liquid simulation which is flat liquid, and then suddenly erupts making waves. for example on frame 0 the surface is calm flat, and then as I ...
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Piston pushing on liquid to move another piston

I'm trying to create a physics-based animation using two rigid pistons sliding inside a passive rigid body cylinder. The right cylinder pulls against a fluid geometry domain, which pushes against the ...
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Unable to get my smoke + fire Simulation to be of a realistic quality

I am currently working on a client's freelance project but have hit a wall with the smoke+Fire simulation/Mantaflow. I have been looking at all the youtube videos, forum posts and the like to help get ...
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Can I apply modifiers to a flip fluid simulation

With flip fluids addon, can I take a baked simulation and then modify the mesh as if it were regular geometry? For example, can I apply a decimate to make a low poly version of the simulation? Doing ...
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How do I make my fluid thinner?

I am using the fluid sim in Blender 3.1.2 and it works great except my fluid is thick. How do I make it thinner? When I attempt to reduce the thickness of my cube (that has fluid) the fluid sim stops ...
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Rotate object particles in a fluid

Is it possible to randomly rotate object particles in a fluid (liquid)? I'm trying to simulate the effect of a glittery snow globe via a fairly low density fluid. The problem I'm having is that all ...
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1 answer
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Flip fluid addon locking off parts of obstacle

When the fluid bakes, it stays contained in an extrusion in the mesh as shown in the pictures. When debugging the obstacle, I found that it closed off a part of the mesh and the fluid stayed contained ...
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how to make flames look more realistic?

So my problem is that my flames always turns out like a cloud of orange paint. The shape gets better when i stop the animation but isnt really pleasing too..
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blender fluids problem

ok so i have a simple scene, i set a domain for the fluids wich covers the whole scene, and then i have a cube that is suppose to emit the fluids. but as shown on the picture the ligquid is also ...
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Bake not saving

I'm still trying to light my monkey head on fire. I figured out how to bake the data but when I click off of the fluid tab in simulations it disappears. How do I get my settings to save? If someone ...
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2 answers
102 views

Blender - Quick Liquid - Domain is a glass cube

In Blender 3.3.0, "Quick liquid" creates a domain which is rendered as a glass cube. I tried in several ways but please check the most straightforward one: Brand-new Blender session Change ...
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1 answer
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Fluid bake crash and cache missing

I have 2 problems when baking fluid sim. First I have the issue that when I bake fluid sim Blender just suddenly closes. No error msg or anything. It happens when the resolution comes up at 256 or ...
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36 views

Does the fluid bake while rendering?

I have a scene in which I have multiple domains with fluids. Is the fluid simulation calculated automatically while rendering even if it hasn't been baked before? If so, can I disable this when I want ...
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1 vote
1 answer
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Rendering fluid simulation in false colors

I need to render a fluid simulation in digital style like in the picture below. I prefer eevee for rendering but if someone know how to get it in cycles this also might help. So literally I need ...
1 vote
0 answers
34 views

make swosh fluid stylised motion graphics [closed]

is there a way to make such designs in blender? like fluid moving stylized mograph style. have been trying, not very good in blender. Thanks
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Fluid sim hitting an invisible wall in 3.2

I have googled for forever and found some things from 6 years ago but nothing that answers the issue and I'm pulling out my hair. My fluid sim hits an invisible wall and I cannot for the life of me ...
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While rendering only certain images are rendered

I created a liquid animation. However, once I render it in cycles (as a series of png images) most of the images just show the background, without my fluid object. But in a few images the fluid is ...
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59 views

How do I fix that liquid particles not rendering?

When I try to final render my particles they don't render. Preview Render
1 vote
1 answer
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Problems With Effector In Fluid Simulation

Today I am trying to create a fluid sim that pours coffee into a cup. I followed the general formula for creating and baking it but the liquid will not pour into the cup, it always fills up the domain ...
3 votes
1 answer
194 views

I want to animate a viscous clay-like object (ball shapes)

Actually, I have made a similar post in the past and I know that I can use geometry nodes but I am ashamed to say that I don't understand geometry nodes, so I don't know the right answer. I tried to ...
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Quick simulation problem

I have an animation project, say 250 frames long, at frames 50 - 70 I want to run a fire simulation, at frames 100 - 150 I want to run a liquid simulation.I run into several problems: In quick smoke ...
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1 answer
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Blender liquid Simulator too little blue particles

I have a domain liquid and flow liquid. But unlike tutorials the blue particles are just barely visible drops of water instead of the splash. I tried scaling then apply transform for the cube size. ...
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27 views

Traceback Error (Key Error: 'bpy_prop_collection[key]: key "Fluid" not found

hi, When I click world on ViewPort, that error occur How can I solve this error?
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3 votes
2 answers
233 views

How can I make an object appear in timeline at a certain frame?

How can I add a specific object to my timeline at a certain frame? I want to add a flag which should float over a pre-baked water fluid simulation. I baked a drop falling into water. After frame $120$,...
1 vote
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How to make the sphere which falls into simulated water be deformed by this water too?

There are tutorials telling how to make a liquid simulation. Also demonstrating the objects which fall into water creating splashes, waves, etc. I want to step ahead a bit: how to make the object ...
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0 votes
1 answer
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Fluid simulation not showing smoke and flames

I have tried to follow the tutorial at explosion réaliste but I'm stuck when it comes to bake the fluid simulation. After calculation, I still get my particles as small balls, as before the simulation....
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2 answers
30 views

Fluid simulation visibility of domain

I am trying to run the fluid simulation in an animation project. Say, the start of simulatin is frame 40, end of simulation is frame 60. But the total animation goes to frame 200. The domain and ...
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3 votes
2 answers
57 views

I want to make clay-like animations

I want to make a simulation animation like a movie. I have tried using Fluid in Simulation, but how can I express a viscous substance like clay like in the video? Or would another method such as Soft ...
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1 vote
1 answer
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Blender fluid basics: how to create water

I’m a beginner at blender physics and I’d like to create add in an empty cube container some water, but I haven’t found yet a good tutorial about blender fluid physics. Can anyone redirect me to a ...
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Fluid visible in viewport but not able to render

I have created a fluid sim which looks fine in the viewport rendered mode but will disappear in the final render. The usual solutions are to check render visibility which in this file seem all on. I'm ...
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How to revert liquid to it's original state

I applied fluid physics to this mesh, then decided to take them off, I delete/disabled them, however the mesh now has invisible faces and I can't figure out how to make them visible again.
1 vote
1 answer
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Problem with fluid simulation

Can anyone explain me why the ball falls into the water withour making any wave and why the inflow doesn't emit water?
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Blender for SPH Simulation of Multiphase Flow

Hi I'm a Blender newb and I've been looking to do some fluid simulations of a multi-phase flow, I was wondering if this is something that can be done in Blender? Basically I want to do a Smooth ...
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4 votes
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What are possible options to flatten an object due to weight and viscousity, or fake it :)

I've modelled this kind of toothpaste piping. Trying out beziers etc. Now I'd like to make it look as if the matter is being squished a bit, via gravity or some other technique. The look I'm after is ...
3 votes
1 answer
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Beach waves project - Fluid dissapears over time

I try to make my own beach waves simulation like the ones one can find over and over on YouTube. In order to test the animation of the fluid waves, I prepared a small test project, in order to be able ...
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Fluid volume disappears inside of a moving object?

I've noticed that with the flip fluids addon and the built-in fluid simulator in blender, if you have fluid inside of a moving obstacle/effector, that fluid volume will eventually disappear over the ...
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How to add liquid or smoke effect in headless python?

Has anyone a python script at hand to add physics effects (liquid or smoke) headless from scratch? I'm asking since either quick effects or my non-quick attempt below result in ...
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Weird fluid simulation result

I am trying to do a coffee machine simulation thing and after I baked it, the fluid started flowing from the bottom of the cup (aka the "Effector") instead of the cylinder at which the red ...
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Error Ваking Fluids Simulation in Flip Fluids аdd-on Blender

!]2 I installed the flip-fluid add-on from another website, not the official one (I can't afford the original one). It seems to work fine, but when I try to make the simplest smooth animation in ...
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