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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I'm having trouble finding the fluid Viscosity bar in Blender 2.83

I was watching a fluid tutorial, but it was using blender 2.8 while mine is 2.83 and I am having a trouble finding the Viscosity bar. Can you help me solve this problem?
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Problem animating speaker making fluid move

I am new here, I did a few projects but now I got stuck with a new one, what I am trying to do is to make a speaker reacting to the music, but the problem is when I try to simulate some water which is ...
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Why is my fluid simulation not working

every time I make a fluid simulation it works but when I need a break or I'm done for the day I close blender but when I reopen blender and press play it never works even though everything is the same
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Visualizing voxel data from smoke or liquid simulation in 3D viewport [2.83]

I'm using either the Eevee or Cycles renderers, and I am using the Adaptive Domain feature on a Fluid Domain object. I have set my Adaptive Domain --> Add Resolution feature to 100 voxels (cells). ...
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Need help creating a fluid pouring animation in a FLEXIBLE way

I really like flexible, quick, non-destructive workflows where I can shift stuff around on the go. I want to achieve the effect of molten tin pouring out of a can. Simple enough, but I really don't ...
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Smoke Invisible Except for Color Mapping in Viewport

This simulation uses a modular cache. With color mapping, it looks fine. The default appearance in solid view and cycles view both show nothing until I use fluid upres. Then, the solid view only has ...
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Blender 2.8 fluid simulation result not displayed as mesh

Following the tutorial at: https://youtu.be/35bbyAJodEQ?t=736 I can't seem to get a mesh result from my fluid simulation: How can I get the mesh result? I forgot to bake the mesh. But even so, the ...
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Fluid loss in 2.83

My fluid simulation is a rotating cube filled with water. I noticed, that the volume of the water gets less and less while the cube is moving, but there is no fluid escaping from the cube. During my ...
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Dual gravity for a fluid simulation (looping animation)

I'm working on this looping animation. When the character falls backwards I want the fluid sim to splash upwards as usual. I've set this up and it's pretty straightforward. What I'm struggling with is,...
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Volcano eruption Blender

I'm currently using Blender 2.83 and I'm new to fluid simulations. I want to create a volcano eruption, using fluid. I've created my collision and used a UV sphere for where the liquid will flow from. ...
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volcano eruption

I have created a mountain in blender 2.8 and I want to use a fluid simulation to make it look like the mountain is erupting. I added a uv sphere and made it an inflow fluid. the fluid is running down ...
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How to add fluid simulation to an animation in blender?

so I've made an animation of some characters rotating along an axis, and I want to add a fluid simulation at a certain point in the animation. At around 240 frames in. Basically I've got a model of a ...
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FLIP fluid simulation does not detect collisions anymore

Sorry for such question, but someone is getting dumber by the second (me or blender): fluid collision stopped working completely (worked before by some miracle) Domain is set, fluid set as Geometry, ...
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Can't find Bake option.. Blender 2.83 [duplicate]

I'm trying a fluid SIM in the latest version, 2.83, and I can't seem to find the bake option for it. It used to be under settings tab but it isn't there anymore. Please help.
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Why doesn't my effector work like I want it to with the new Mantaflow (Blender 2.82)?

I want the plane highlighted in the picture to work as kind of a surface for the water simulation to run through, but when I go ahead and simulate it, it just goes through the object like if it was ...
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2.83 Mantaflow / Smoke-Volume Rendering errors

I have some problems with my mantaflow simulation and really can't find the error. It's baked, has a principled volume shader, it looks fine in viewport render, but when I hit F12, it doesn't render ...
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59 views

Looping Fluid Simulation - Boolean Performance

I am trying to create a looping fluid simulation. This is something that I have never seen done elsewhere, without faking it in post/sequencing, but I think that my method should work. The ...
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Is Smoke Flow Force Field broken in 2.8x?

I'm experimenting with smoke flow field and it works as expected on 2.79 but when I try to apply the force field in 2.8x it doesn't work at all. Is this a known issue or am I doing something wrong? ...
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How do I create a fluid vortex/whirlpool?

This questions has been asked before but never satisfactorily answered... I'm looking to create something like this... https://www.youtube.com/watch?v=cCjCQwgcXHg As you can see, its liquid so I don'...
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How can you make a beer simulation Blender 2.83 (Mantaflow)?

I saw a lot of fluid simulations that look gorgeous thanks to the foam that Mantaflow adds, could you make a beer with foam simulation with it?
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1answer
447 views

Bake missing in Blender 2.83 [duplicate]

I'm new to blender, and I'm trying some basic water sims. I can't see Bake in the UI anywhere, and I've been looking for over an hour... Any ideas?
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Why does my render output change everytime I click render image?

I am using Blender v2.83.0 to render a Motion Tracked car with Smoke simulation in Blender and I cannot seem to get my render settings correct. I am getting a problem where every time I click 'render ...
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'Bake data' button not visible in fluid options

(new to blender) i am trying to create a fluid sim in blender 2.83 but in my physics tab under domain there is no 'bake data' button in the options. It's there in all the tutorials i've watched but i ...
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Can’t render fluid simulations….?

Me again. There are lots of tutorials on fluid simulations but none on how to render them, LOL! I’m obviously missing something. When I try to render all I see is the domain cube! If I turn off the ...
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1answer
165 views

How to bake Mantaflow simulation in version 2.83

I tried development versions before, and there I could use Object > Quick Effects > Quick Liquid and there'd be bake data / bake mesh buttons in the Physics Properties. Now, it seems like the bake ...
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215 views

Why i cant see ''Bake data'' on my blender 2.83?

I am trying to make a fluid simulation but after all the settings done i dont see ''Bake data'' option in my physics panel.
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1answer
38 views

Mantaflow not baking particles

I'm new to Blender, and I'm trying to do the simplest fluid simulation possible in 2.82 using Mantaflow. I can't tell if I'm experiencing a bug, or not following the correct guidelines. I'm using ...
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2answers
42 views

Blender Mantaflow - How to make fluids come out with pressure? Like from a hose?

I'm trying to make a liquid simulation with Mantaflow where the flow of the liquid respects the flow object's local rotation, so it looks like water spraying in different directions. It looks like the ...
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1answer
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How could I add the FLIP Fluids obstacle component to multiple objects at once?

I'm creating a simulation involving a cell-fractured object. There are 600+ objects in my scene that have to be FLIP Fluid obstacles, is it possible to add the component to each object automatically? ...
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67 views

Fluid Simulation particles appear and disappear randomly

I'm using the Mantaflow fluid simulation in Blender 2.8 and randomly some particles appear or disappear. Is there a way to tell Mantaflow that the particle count should always remain the same? I'm ...
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1answer
26 views

Unwanted fluid simulation clumping

I'm running this fluid simulation at a small scale (real-world scale) and I find that the water particles clump together into balls? I can't seem to find the setting to make it more like a constant ...
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1answer
17 views

Fluid Sim is not being emmited

Whenever I try to add any type of liquid or smoke simulation the object set to inflow doesn't emit anything i tried changing the setting for both the inflow and domain.Could it be due to my hardware ...
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1answer
26 views

Fluid simulation restarts randomly

I am a beginner, so I'm just learning how to make fluid simulations in blender. I have a fluid simulation with a domain, 3 effectors, and the inflow, which has 2 keyframes, one at the start and one ...
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I have a project which requires baking a fluid simulation and rendering within the time limit, its been one hour and its stuck at 0%

Im trying to render a small toy ship falling into a block of water.. I just did a basic fluid sim, following the same steps I always do (which usually works) and I replaced a ball with the OBJ ship ...
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I am new to blender and I am trying a fluid sim but its stuck at 0%

I don't know if I am doing it right or not but it's stuck at zero. The fluid quality is at 125 and pretty choppy. I don't know if I'm doing something wrong or not but it's stuck at zero. I would ...
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31 views

Mantaflow domain cache replay in fluid simulation

Version 2.90.1 (same issue with previous versions). If I have an emitter like liquid-inflow, to see the results of changes in position or surface emission etc. I have to re-select the replay option ...
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1answer
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Why is my fluid simulation going upward and not originating from the flow? I am not using any initial velocity

Mantaflow liquid simulation not originating from the flow which is a cylinder in the picture. Instead it is originating from below. What am i doing wrong?
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58 views

How can we use liquid in blender to push objects?

I'm making a simulation that includes water knocking down a structure. But I don't know how to make the water have influence on it's surroundings, like simply pushing a block forward. If not, does ...
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1answer
27 views

in my simulation some of the water is stuck on walls blender 2.82

so i tried water simulation (pouring water in glass) and the water is almost stuck in the wall and wery slowly going down blue particles on the picture blender: 2.82
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Problem with fluid simulation particles

My particles of bubbles spray and foam in fluid simulation comes out fine in render and right when denoising finishes it looks like the following picture. Does anyone know, how to fix this please? I ...
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1answer
32 views

Smoke Simulation does not appear in Eevee viewport [duplicate]

I was learning how to do smoke simulations today, but when I applied object -> quick smoke, and pressed play, no smoke could be seen coming out. I then tried baking the simulation, and it finally ...
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1answer
21 views

Color change shows up in viewport but not when rendered

I've been trying to do a liquid simulation in blender today and so far it's turning out pretty cool... My major issue is that I'm trying to get it to change color but when I go to render the image, ...
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37 views

Fluids passing through effectors Mantaflow Blender 2.82

In one of my classes in college I was asked to animate a pipe with running water. I looked at many Youtube tutorials on fluid simulations and managed to make a simple one. However, when I try to make ...
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30 views

Particle simulation as fluid inflow

I have a scene with a fluid domain and a particle simulation. How would I use the particle simulation as an inflow for the fluid domain? (I'm using Blender 2.90)
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Why don't I see the fire of a smoke simulation I instanced in another scene?

I've made a fire sim in one scene. When I instance the collection containing that sim in another scene, I don't see the fire show up. Is there something special I need to do to make that show up? Is ...
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19 views

Fluid simulation in Blender — surface collision and velocity vector field

I am trying to make a following scene: a liquid flowing in some closed surface given by a precise function. The liquid has to be completely inside the surface (imagine water in a pipe). However, I did ...
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38 views

Soft served icecream animation

Hey guys I was trying to animate this sort of a scene: https://youtu.be/m5vxl7-xqIs I tried using softbody physics and tried viscous fluid simulation but neither worked. How do I make this in blender?...
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Blender Fluid Simulation with Motion Captured Footage

I am starting on my attempt to do a fluid simulation with motion captured footage. I intend for the footage to run as a camera background and the fluid simulation in the foreground in front of the ...
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drop with a specific shape into a quiet liquid water surface with mantaflow

I'd like to realize something like this https://www.youtube.com/watch?v=RLn1ErhxOPo With the previous fluid simulator in Blender I was able to set a shape as a quiet basin of liquid, and another ...
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29 views

New water simulation for 2.8 not showing up

I wanted to do a water simulation in a cube, but for some reason the water particles only show up for a couple of frames before disappearing completely. If you have any suggestions, please let me know....

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