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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22 views

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
24 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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1answer
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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
33 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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11 views

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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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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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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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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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
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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
18 views

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
23 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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12 views

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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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
49 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
46 views

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
44 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
38 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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31 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
46 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
21 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
45 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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28 views

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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0answers
118 views

How to increase ocean foam?

I created an ocean simulation in which a ship passes and displaces the ocean but the problem here is that the foam is not visible or less visible in camera view. How do I increase the foam cover area? ...
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Fluid simulation ... How does the Blender User Resume Mesh Baking without pressing the escape key first?

Desired Scenario Mesh Bake is always resumeable in the UI (The degenerate case being 0 frames to bake). Resumeable means the UI offers a Resume button A UI Button that meant bake only what frames ...
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2answers
106 views

Where did the fluid simulation point caches go in 2.93

I used to manage fluid simulation point caches by copying them to a remote server for cloud rendering, they used to be in ...
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22 views

Fluid simulation destroys CPU temperature [duplicate]

I didn't realize blender was putting so much strain on my CPU when I bake fluid simulations. I'm doing 200 Resolution divisions and 4 Mesh 'Up res factors' The CPU temps reach up to 95c and keeps ...
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1answer
28 views

Fluid Simulation won't do anything... whatever I try

So i made a very simple fluid simulation in blender 2.91.2 and whatever I try nothing happens (or at least shows up). The only time I get anything to work if I use a cube as domain and a UV sphere as ...
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41 views

Fluid simulation - in-flow that doesnt start from frame 1 shows domain as an object until the inflow kicks in

Fluid simulation problem: i have a fluid simulation that i want to animate. i do NOT want the flow to start on frame 1. I want it to start on frame 20, ending on frame 50. I did the following: set a ...
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How does the Blender User reuse a fluid simulation .. without an undesired cache delete?

Desired Scenario Create a fluid simulation once and use it multiple times with a different range of simulation frames using different Blender files. Cache should be read only. The fluid simulation ...

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