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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18 views

Mesh requirements for Mantaflow effector?

I'm having trouble being able to make a mesh to use as an effector with a fluid simulation. No matter the shape I make (cylinder, cube or sphere with the top off and a solidify modifier applied to it),...
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I can't create a fluid simulation when I import my obj model in the same project [closed]

I have this model that I want to create a fluid simulation to pass through it, but for some reason no fluid shows up when I use Quick Fluid. If this is also of help, the model was made with flip ...
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My fire simulation doesn't start [closed]

I'm trying to make a fire breathing dragon but my fire simulation doesn't work. When I first set up the simulation and then bring the dragon model, it works, but when i try with the model already in ...
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1answer
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Simple water ball simulation?

So its seems simple enough but I cant seem to get the result im looking for. Its just a spinning water ball like the one seen in Harry Potter. I thought you could just turn off gravity and quick ...
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1answer
42 views

How to make Mantaflow spawn less fluid without resizing source?

I'm trying to get a fluid simulation working so that I can have a character who's basically always dripping (he's kinda made of fluid? It's difficult to explain). I want to use Mantaflow for the ...
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Trouble converting Mantaflow fluid from particles to mesh

After baking my fluid simulation, everything turns out fine except for the fact that my fluid shows up as just a collection of blue particles that outline the fluid and its movement, even in the ...
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1answer
35 views

What are particle settings for water spray simulation?

I was trying to recreate some scenes from James Cameron's Titanic. I wanted to make this scene look like the ship displaces water and throws water splash particles. I have used fluid simulation for ...
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How to import numerical fluid particle data to Blender?

I have numerical files output from a c++ program for fluid simulation by solving Navier Stokes equation using particles, the file looks like this ...
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1answer
36 views

Why there are black patches visible in fluid simulation?

I created a fluid simulation that imitates a ship moving, creates splashes, and displaces water. I made this scene in a large-scale ocean and I've cleverly made it to imitate that the splashes that ...
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Is it possible to stick fluid particles to a wall?

Is it possible to simulate a glue-like fluid to stick flat mesh wall? I've tried different settings to make it thicker and slower but it always slides down like wet cement. What should I try that ...
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How to make a dynamic paint brush from a fluid domain so fluid sticks on effector objects like paint?

Problem Hi! I'm trying to make a paint splatter that gets thrown on an effector with many polygons, and lets the color of the paint stick to the surface it touches based on it's shape, cause that's ...
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Mantaflow fluid has a very strong irregularity appearing out of nowhere

I'm trying to make an animation of a pipette dropping slightly viscous fluid on a flat surface. Everything seems to work fine, and then at some point the fluid goes all crazy, has a huge speed and ...
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My glass with liquid inside looks wrong, what did I do wrong? [closed]

I made a simple cylinder, removed the top, smoothed it, then made it transparent by giving it a material with high transmission following a tutorial. After I used quick liquid to create a liquid to ...
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1answer
34 views

I want to make some sticky liquid

I want the liquid to stick to the surface of this cube, like fry batter, or rock tar.
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Fire Won't Render Properly

I've seen this question a few other times, but I've tried every solution I've found and nothing has worked. Followed a tutorial to create fire, and everything works except that mine won't render ...
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24 views

How can I save a frame of a mantaflow simulation and use it as a mesh?

So I’ve done a mantaflow fluid simulation, but I want only 1 frame of it and use it as a static object, is there a way to do that? I’ve tried hitting the convert button but that’s converting every ...
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1answer
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Liquid Stabilisation?

After recently starting liquid simulation, I wanted to know how to stabilise the liquid after it is poured into another object(collision object eg. cup). No matter how many extra frames I give it, ...
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How to separate fluid bake from foam bake

So I've finally come around to exploring Blender fluid simulations as part of a new project I'm working on, and running into some trouble that for some reason I cannot work out through watching ...
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1answer
21 views

Mantaflow doesn't look like water after baking

I'm fairly new to blender, and am trying to follow a tutorial with some fluid simulations. Every tutorial i see, once the fluid simulation is done and they go to rendered mode, it already looks like ...
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23 views

Fluid Sim/Rigid body issues

I should probably start out by saying that I am fairly new to Blender. So I am trying to create just a simple ball rolling down some platforms while emitting water that interacts with the platforms. I ...
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1answer
16 views

Why does my fluid have all this colors after baking? I assume it's a density/ velocity map but don't know how to disable it

Even in render view mode this colors appear. When taking a closer look they are actually particles on top of the liquid.
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1answer
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Blender fluid simulation not working after following step by step guide

i want to create a fluid simulation, but it didn't work as i expected. I was following this tutorial by CGCookie: https://www.youtube.com/watch?v=6B0QM4Cft5c&ab_channel=CGCookie First, I created a ...
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2answers
297 views

How can I make my liquid look like tea?

I'm following the donut tutorial from Andrew/blenderguru and got to the point where he makes the liquid coffee. Since I usually drink ice tea I tried to make the liquid look like tea instead, but it ...
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1answer
18 views

Problem with smoke domain when resizing

Trying to create fire sim but ran into a bit of a problem. The fire domain doesn't encompass the area that I want it to but whenever I resize it and then re-bake it the size of the fire ball also ...
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1answer
28 views

Animating scale of Inflow object doesn’t work

I'm trying to make fluid slowly become a trickle and then stop (ie not animate the "Use Flow" button). I'm a mid level user of fluid simulations. So following this tutorial https://www....
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1answer
47 views

How can I slow down a particle driven smoke/fire simulation?

I am working on a flame simulation that is driven by a particle emitter (Emitter > Flow Source) and everything has been going fine. The only problem is that the simulation is going EXTREMELY fast. ...
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1answer
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How to control the speed of a Mantaflow fluid simulation in 2.93?

Time scale seems to work, but I'm unsure if that's the correct way to do it. In older versions of blender there was a "Speed" value. This is gone now. The reason I'm asking is because I'm ...
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1answer
15 views

Fluid Simulation does not follow collision object morphing with skape keys

I have an ice cube in my scene that is melting. I want a slow melt so didn't want to use fluid to geometry. So I have my ice cube with a flow object ontop of it acting as the water dripping from the ...
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1answer
24 views

Fluid Mantaflow Simulation Effector not behaving correctly

I'm new to Blender's fluid mantaflow, I am currently trying to get the fluid to collide with the main effector, and then flow to a mug, but it seems like both the effector have too dense collision (I ...
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Can I animate a collision object into a flow geometry in fluid sim?

I have an object that is a collision object in my scene, however halfway through my animation I was wondering if there's a way to turn the object into a flow geometry object without baking my scene ...
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1answer
25 views

Cache button and bake button missing in fluid

[ Bake button is missing in fluid panel. Other tutorials said to change the cache settings, but that too is missing! The picture is fully scrolled, there are no more options How to bake?
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Limiting splash area for fluid simulation?

Hey there I have a burst pipe simulation I need to do for a client but I need the splash on the ground limited to here in this first image. But it’s spreading out too far to the domain edges and ...
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Import .csv files to render as fluid

I have a C++ code that computes a convection current problem by modelling the fluid as a series of particles. I have the coordinates and temperatures of these particles in a .csv file and would like ...
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1answer
50 views

Is there a way to fill a cube up with fluid?

I am trying to make a fluid simulation render like this: I don't want it to look like that, I just want a tank filled with water. It needs to be a FLIP/APIC simulation so I can use Effectors and more ...
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How to make vortex fluid simulation?

Good daytime. I'm trying to achieve this type of fluid form, but unfortunately I can't do similar. Do You know some techniques to be more realistic? Thanks.
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1answer
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Fluid simulation not showing for complex scenes

Good evening all, I'm experimenting quite a lot with the fluid simulation, but unfortunately it only seems to work with very easy shapes. The cube is the domain, the mountain the collision object, ...
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1answer
18 views

Generating waves with fluid sim in 2.9

I would like to generate waves for my scene. But my wave generator is currently not working as I would like it to. As You can see the water seems to be compressed somehow and no waves are generated. ...
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1answer
45 views

Why does my fire + smoke simulation look chunky?

I am following this particle explosion tutorial https://youtu.be/29yfS-icS3M and for some reason instead of looking nice and billowy and realistic, it looks like a bunch of floating chunks. My theory ...
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1answer
23 views

Start Fluid simulation before frame 0

I want an object to emerge from the water. So I've created a domain and a water object in order to create my water. When I begin the simulation it needs several frames for the water to settle down ...
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1answer
42 views

Fluid Simulation has Blue Dots around the Edges of Baked Mesh

I've searched for an answer and can't find out why my blender is acting up like this and i've messed up everything i can think of: Upres Factor, Resolution Divsions and Substeps Sampling and to no ...
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1answer
17 views

Fluid go through container when it's moving

I'm having a problem. As you can see on the pictures, my liquid simulation passes through the glass when the glass is moving. I tried to invert normals, to increase the surface thickness of the glass, ...
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0answers
32 views

Where can I find temp difference for fluid smoke simulation?

I'm following an old tutorial online on how to create liquid splashed using the smoke sim. But I can't find the Temp Diff setting in my version or it's equivalent. Could anyone help? I essentially ...
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2answers
47 views

quick liquid shows a black box on 3d viewport [closed]

I can't seem to figure out why it shows a black box in 3d viewport. I followed a quick liquid tutorial and I used a quick liquid function from the F3 menu, after changing the liquid from geometry to ...
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7 views

Fluid bake wants to re-run when I reopen the file

I have a blend with fluid that often seems to ignore that I have already baked the data, showing the Bake button instead of a Free button when I open the file again. While I could ignore this (the ...
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1answer
36 views

How to make this explosion look less orthogonal?

Suggestions on how to make this look more natural without increasing the resolution too greatly? Trying to minimize bake time. https://youtu.be/gKrwqdeRbuY
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Blender Fluids Vector Blur

Since the new fluids engine was introduced in Blender 2.82, I have been trying to get the vector blur function to work, but so far not good. I managed to get a good result for the fluid itself from ...
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1answer
22 views

water not following a path even after adding path constraint

I created a pipe in 3d. water does not follow the path but starts falling downwards. So, I added path constraint (follow path curve object) inside the pipe for the source object. My source object is ...
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2answers
49 views

How do I stop some liquid particles passing through an effector?

I'm having a problem with a simple liquid simulation in blender. I have a domain, an inflow object (just a small cube), and an effector (which is a square shaped bowl with very little geometry). ^ ...
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1answer
22 views

Fluid domain does not react to object inside object

My domain doesn't react to text object inside of it (text is inflow and converted to mesh). I've attached blend file below.
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Converting fluid simulation to key frames?

Can you convert fluid simulation to key frames? I need to export my simulation from one blender file to another.

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