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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21 views

Creating a custom glossy volume shader with reflections?

I've imported a whitewater fluid simulation made in Houdini as a VDB and have managed to render it using the Principled Volume BSDF, but without the specular/reflection highlights that whitewater ...
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Help with Fluid Simulation via videocall [closed]

I work on a team project where we have a problem with a fluid simulation in which water should run down a mountainside - we have been trying for weeks, with various tutorials, but are getting ...
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1answer
36 views

Mantaflow - slow drip

I am trying to create an ice melting animation, so need to have my object slowly drip instead of all fluid moving at once. How do I achieve this effect, I have watched plenty of tutorials and have ...
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1answer
33 views

How do I correctly overlap liquid+smoke domains?

I have a fire & smoke domain and a liquid domain, with the latter positioned within the former (see the image below). The F&S domain is active before the liquid domain - the latter is ...
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3answers
23 views

I want to have water flowing nicely out of the water tap

I am testing water flow out of a water tap. But I only get water splashing out. Any one knowing have to make/set the scene to have water running out nicely as it does from a real water tap?
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How to reload a baked fluid simulation?

Open .blend with baked sim Set Cache: to any subfolder with baked data Hit Play animation > Nothing I've baked several fluid simulations. Each in it's own ...
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1answer
21 views

Water physics not rendering

I think I have all objects and physics checked for rendering but my water simulation is not rendering. Can somebody please explain what is wrong?. Adding my file. This is my water simulation This is ...
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1answer
15 views

python script to bake two fluid domains aborting (cmd line)

I am trying to script the baking of two fluid domains. If I manually bake these in the UI: no problem. If I try to run a script from the UI, the application aborts and I cannot read the console in ...
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11 views

Blender Fluid Simulation does not work even after baking at 300 Resolution subdiv

I created a fluid simulation with a domain and a flow mesh, and baked it even at 300 resolution, but still no fluid appears in the scene.
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Can particles and fluid interact?

I would like to drop particles in a fluid, the particles should be integrated in the fluid, a bit like when cooking, mixing chocolate chips into cookie dough. Is this possible in blender ? I know how ...
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10 views

Problem with Fluid-Sim

I'm trying to create a fluid simulation with Blender, in which a flood from a lake runs done a slope. I've built the simulation based on various youtube tutorials (I'm completely new to blender), and ...
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1answer
16 views

suspend/sleep while blender is running

I hadn't used blender for several months and previously when it was running a fluid simulation overnight Windows would not go to sleep. But last night my computer went to sleep. This is blender 2.93,...
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Fluid particles exploding for some reason

I've tried multiple resolution, timesteps and viscosity settings to no avail, the fluid always explodes in the first frames. These results are with 90 divisions, 8 timesteps max and 6 min, 0,010 ...
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Explosion not appearing in Render View

I animated an explosion with 2 fire and smoke emitters contained in a fire and smoke simulation. I have the explosion detonate inside of a structure that starts to crumble on the same frame as the ...
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1answer
10 views

Fluid not baked from script but only from gui

While baking from GUI perfectly works, I have no animation if baked using the script below. What else could I try? ...
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25 views

Fluid arround an effector

I'm trying to do a fluid simulation of a viscous liquid (not much, Diffusion exponent 4), but even with a Resolution Domain of 300 i don't get the fluid touching a steering stick (effector with a ...
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0answers
9 views

Inflow sphere following path while pours liquid [closed]

my problem is that the sphere follows the path correctly but nothing comes out from it. I have tried with keyframes but it didnt work neither. I am not sure if it's possible but my idea was to write ...
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17 views

Cannot use/find a setting in physic settings

I'm new to blender and I'm enjoying it. You guys made it absolutely amazing. My problem is about some settings, I'm creating Animated rain by watching a tutorial in YouTube, but it's on Blender 2.8 ...
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11 views

Liquid Sim Stationary Effectors

I have a literal Blender fluid simulation. I’m struggling to get the fluid to settle back down after being thrown around by a blade and vortex force field. It also seems to increase in volume over ...
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1answer
18 views

Fluid bake crashing at high resolution divisions [closed]

Having the resolution set to anything higher than 128 is a guaranteed crash, the higher the value the sooner the crash.
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13 views

Water drop, slows down after 100 frames

I tried to following several different tutorials, which show how to simulate water drop. So I made simple scene: domain water pool drop Nothing fancy, just basic tests. 250 frames length. When I was ...
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7 views

What does the “flow” setting in turbulence field do?

Force fields, including turbulence, have a 'flow' setting. What does it do exactly? I've read it "converts the force into air flow", but what does that mean in concrete terms?
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1answer
29 views

How do I make animated drool?

How do I animate drool from nothing to a long string of drool with a rounded drop shape. To look exactly like what is on the tongue of this cat. I did this once with Shape keys but it was difficult to ...
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9 views

Can I export fluid cache to Alembic with speed vectors (for motion blur)?

I have exported a mantaflow fluid simulation to Alembic file format, and I want to re-import it and still have motion blur work, but I can’t seem to make it happen. I have tried turning on multiple ...
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1answer
14 views

How can I reset Physics for fluid simulation?

I created a water simulation, added a cube as domain and applied collision to the ground. It didnt work, the water just went through. So, I decided then to apply Boolean to the cube domain that way it ...
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2answers
29 views

Object as fluid

Hello Im new to Blender. I am trying to make a character playing with a glass of wine, so rotating it a bit. so I need the wine to be fluid. I found just tutorials how to make inflow simulation for ...
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11 views

Is it possible to shade/render a fluid simulation with whitewater imported from Houdini into Blender?

I’ve done a lot of research on the process of exporting/importing alembic files of fluid simulations to/from Houdini and Blender and have read about the difficulties in importing custom attributes ...
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1answer
20 views

Find “Smoke” settings under Domain tab [duplicate]

I am following some basic tutorials of smoke simulations. And I always can't find the settings tab "smoke" under the smoke domain settings. I jumped through some tutorials to see if I am ...
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1answer
11 views

How to remove fluid source mid animation

I'm very new to blender, following this tutorial I made an identical animation but I'd like to have a few frames where no more fluid is added but all that had already been poured will keep being ...
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10 views

Copy fluid settings from one object to another?

I'm making a smoke simulation and have edited the settings of the smoke "flow" mesh, but now I would like to replace this mesh for a different one, but without losing the flow settings. Is ...
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1answer
33 views

Why is my fire simulation blocky even with 5000 resolution divisions? [closed]

For some reason, my fire simulation is really low resolution even if i set it to a crazy number of divisions. why is this happening? here it is with 5000 resolution divisions here it is rendered out
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1answer
107 views

How to get this splash effect in the fluid simulation?

I'm Tying to make this animation in which a cookie flies and splashes into a coffee cup, but something's not right. The cookie makes the fall in one and a half secod (If in 30fps) but even at 256 ...
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2answers
30 views

Fluid simulation fluid either pass through effector or it floating above the effector

I used a plane as an effector, if I do not check the "is_planer" the liquid will pass through the plane, if I check that option, the fluid just floating above the plane, I can not manage to ...
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21 views

water doesn't flow inside closed sphere

I checked many tutorials and guides on how domain and the liquid engine works. I also troubleshooted all the common problems why water does not flow and after hours of researching I found a fix myself ...
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1answer
6 views

Fluid Sim Liquid Domain is bigger then the area I dedicated to it

I´m currently doing a little fluid sim and the area of my domain is bigger then the object itself. Anyone know how to fix it?
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How to get fluid to behave like droplets on a hydrophobic surface

I am trying to create an animation of the scene shown in the picture below. I want all the little fluid droplets to be attracted to the big one in the middle and be absorbed by it. I have tried using ...
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1answer
35 views

Fluid Simulation Not Working, updated software and have done hours of research [closed]

Running 2.92 Blender user since 2019. I'm trying to fill a glass with liquid. I can't get the fluid simulator to work consistently. I've been fiddling around with it and had limited successes, but can'...
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13 views

“Quick Fluid” is reflecting an old (not current) HDRI

The environment texture with a tree (shown in reflection) was not the world texture set when I created the "Quick Fluid" it was the stars. I can't work out, how this old texture is being ...
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12 views

How do I make fluids “fade away” or shrink with fluid simulations?

Newbie to fluid simulations here. I'm trying to make a splatter effect with a fluid, and I want it to look similar to RE7's blood effects, where they are baked into 3D. However, I can't seem to make ...
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33 views

liquid simulation with Viscosity getting weird (like explosion)

I have a question about fluid setting. (blender 2.92) I set 3 fluid output with initial speed 3m/s in Y/Z direction in a Domain. (All three inflow are the same) Resolution Divisions is set at 32. I ...
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1answer
22 views

Water flow at the normal to a face

I want to make liquid flow out of a face of an object with the water flowing at the normal to the face. I've included an image demonstrating how I want this to work. I'm pretty inexperienced so if you ...
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1answer
26 views

My river water won't flow at steady rate, any solution? (found it)

(edit : i've found what worked for me, check below if ure interested) Im trying to make a steady river flow. It's actually just water flowing "horizontally" from the start (unlike my gif), ...
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1answer
20 views

Fluid simulation only affects certain parts of a mesh?

I'm pretty new to Blender, so forgive me: I'm currently following this tutorial but for a different mesh, not text. https://www.youtube.com/watch?v=jcPV3AkMRLI&t=134s The problem I'm facing is ...
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2answers
59 views

How to fill up every part of a geometry with a fluid?

While fiddling around getting the letter F filled up by a fluid for an animation, I don't get the fluid to reach the horizontal parts of the F. So far I´ve tried: Domain resolutions: 32-128 Effector ...
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1answer
27 views

fire simulation start frame

I'm trying to do a fire simulation that should look like a meteor. I have applied quick smoke, then smoke and fire on the physics tab but the fire appears right after 100 frames, too late for what I ...
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6 views

Blender Resume baking simulation from a specific frame? [duplicate]

does anyone know if it is possible to resume a water simulation from a specific frame? I already baked the water falling and I forget to add an effector at the bottom, and I wanna rebake but not the ...
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1answer
27 views

How to get a plane to emit an object in a fluid simulation?

I have a question about making a plane emit an object as a particle. So I am making this scene where balloons are going to fly through a subway corridor and I am trying to make the particles come out ...
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15 views

Liquid disappearing in Mantaflow when container is animated

I am using Blender 2.92 os OS 11 I have done okay with Mantaflow and it works once I understand what I believe to be quirks... I am doing my first animation where I am moving the container/collision ...
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2answers
49 views

Fluid won't go through a hollow-moving-effector, they just move aside

Obligatory kinda new to blender, have just been following some little tutorials here and there. Background about my project : I'm trying to make an archimedes screw. Basically it is made of a long ...
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1answer
24 views

'Blend' in planes to create ocean/lake and also with Flip Fluids surface

Hi there, normally I am able to find all the answers on this forum and it got me very far of what I want to realise. However, I wasnt able to find an answer to the following problem. I created ...

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