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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107 views

After baking my water simulation the play back of the water is tiny colored dots

After baking my water simulation. The playback of the water is coloured dots, tiny ones. What is the setting to change this? I have watched youtube tutorials and I followed them step-by-step but it ...
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23 views

Soil physics / simulation

How can I make an active soil in Blender? I need something that is correctly affected as a shovel interacts with. It would be great if there be the possibility to vary the size os the soil particles. ...
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1answer
869 views

(Blender 2.82) Mantaflow Fluid Simulation not working

So basically I've been trying to get a simple fountain fluid simulation to work. However, there are a lot of times despite after baking data and mesh, nothing happens. I just see the baked mesh in the ...
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13 views

Flow imperfections on surfaces with a slope

I ran into a problem. The attached image shows a road which has a slope to the left an to the top (2 deg). For some reason the water in not flowing as expected. In the center of the picture you can ...
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42 views

Fluid seems to ignore Effectors (moving obstacles)

I am new with fluid simulations in Blender. I once got one to work, but that was in the old fluid simulator. I can get the Fluid to be simulated, but the obstacle is being ignored. I would like the ...
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6 views

fluid simulation shows hdri with low opacity in render

So I have a fluid simulation starting at frame 60. And from frame 0-60 I can see my hdri at render with low opacity. It is a problem, because I want to make a transparent animation what I can layer ...
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19 views

How do I stop fluid 'leaking' through my fluid obstacle?

I am having problems with the fluid 'leaking' through my mesh obstacle. The left side of the domain fills up with a liquid, while the center obstacle transforms it's position half-way through the ...
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0answers
42 views

Is it possible to animate domain in mantaflow simulation?

I want to animate the movement of a cube (domain) with water like here: youtube, but the water sticks to the bottom of cube (domain). If i try to use an effector as a cube the water just goes through ...
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20 views

why i cant see smoke effect?

I am beginner to the blender, have just 1-month experience I never tried any simulation but now I tried smoke effect but I can't get any smoke I have seen youtube tutorials, I followed the same but ...
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66 views

2.82 fluid simulation under water object spawns bubbles

i have a collision object in my 2.82 flip based fluid simulation that starts off below the water and then jumps out and returns, like a dolphin jumping. the object is under water when the simulation ...
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57 views

2.82 can't change fluid size

I am using the new FLIP based Fluid Simulation of blender 2.82. i am trying to simulate a large body of water and not a small container like all the tutorials. though testing i have found out that ...
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1answer
84 views

Speed up Fluid Simulation for Fluidless Frames

In my fluid simulation all inflows are disabled until around frame 620. There is absolutely no fluid in the scene up until this point. I would have thought that the fluid simulator would quickly ...
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11 views

Managing Flows: Are the inflows & outflows required to be in a fixed location during the simulation?

Is there an accessible way to script the location and momentum of inflows throughout a mantaflow simulation according to a python program? I am attempting to model waves crashing against a tidal ...
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1answer
1k views

No “obstacle” option in fluid type

I'm trying to make gas flow through a tube. I've watched many videos demonstrating similar procedure. And they simply add a cube or any other object, go to the 'physics properties', click 'fluid', ...
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1answer
524 views

Fluid simulation domain visible

Whenever I try to do a fluid simulation, the fluid domain remains visible. I have tried:ctrl+a-scale, turn on/off visibility for render/viewport Here's a video demonstrating my problem: https://...
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0answers
8 views

Can the inflow of a fluid simulation be scripted to flow water at varying mass & velocity during the simulation?

so I'm attempting a simulation of what is essentially a tidal barrage, and convinced myself that blender would be the easiest way but I don't see a convenient way to edit the behavior of the inflow in ...
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34 views

Fluid Simulation not showing up in Render

I've done everything, to my knowledge right, but for some reason, the fluid doesnt show up in the render. Here is my Project File: https://www.dropbox.com/s/xw5cveokw7kftqp/Landscape.blend?dl=0
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13 views

How to preserve object's materials in fluid sim?

I have an object with multiple materials that I want to turn into liquid but once I make fluid simulation it just turns into liquid with default liquid material (glass + volume). I want to liquify ...
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19 views

Blender 2.82 simulation interface unlock?

upgraded lastly from Blender 2.79 to 2.82. With 2.79 I used Blender to do fluid simulation. Now trying the same with the newer version. Unfortunately, the new version locks the screen during ...
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8 views

Can a fluid simulation be arrayed with boundaries matching to look larger? (Periodic Boundary Conditions)

I'd like to use a small fluid simulation in an array to create the look of a much larger domain. The problem is that the boundary of the fluids do not line up. Is there a way to create periodic ...
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1answer
51 views

Blender Fluid Baking taking so long

I am trying to make a little coastal scene, very basic just the odd wave and clash with a rock or two. The fluid sim bake is 771mb, why does it take 2-3 hours to bake that? My computer has these ...
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0answers
617 views

Mantaflow liquid, Blender 2.82a - Not using the GPU

I'm baking a liquid simulation with Blender 2.82a. I have an Nvidia GTX 1060 running in an HP Z600 workstation with twin Xeon CPU's. The baking is only using my CPU's not the GPU, even though I have ...
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13 views

Fluid sim using mantaflow resets even during bake - but carries on?

Im getting this very strange glitch/error with mantaflow on bledner 2.82 where during the bake the fluid sim will reset and carry on running. See the screenshots. Here in frame 48 it is running but ...
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25 views

what's the issue in my steps for The Fire simulation?

I'm new in blender don't know if it's bug or it's a miss understanding how it's work the Fire or smoke simulation. The fire or smoke doesn't show up in EEVEE engine and in the Cycles engine ...
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78 views

Mantaflow water simulation cache type replay/live preview wont work fo me

I was following along a youtube video on how to do a water simulation with mantaflow by CG Geek.I don’t know why but when he selects reply/live preview as the cache type but when I select the reply/...
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31 views

How to create realistic water blast in blender 2.79?

I'm trying to create a scene like this can't seem to figure out what I'm doing wrong create a fluid object sliding down a plane to make the water rise up just like in the image. I tried many ...
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31 views

Initialization and synchronizing frame taking longer than render

Essentially i am rendering a fluid simulation and i understand that it should take quite a while to render especially with ram and cache limitations but im concerned at the fact that synchronizing ...
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10 views

I would like a metaball particle system to emit smoke

I cannot attach inflow to particle system. Is there a way around this. I have tried export and import metaball animated partial system as a mesh and keep running into roadblocks 2.82
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1answer
238 views

Fluid Animation have dragged me through blood and sweat

I've been trying to animate fluid simulation from past 3 days, and i've failed. Sometimes inflow object didn't emit fluid, tho it was set correctly, sometimes fluid was c o m p l e t y ignoring my ...
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1answer
27 views

Liquid simulation looks weird. Strange patterns

I`m new to Blender and I have a issue with my liquid simulation. I tried to make a glass of water, but the water acts more like jelly when its in the glass. It would look more natural if the water ...
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53 views

Fluid animation, object which holds generated fluid

I'm working with fluid animation and i struggle with one thing. I want my cup to hold the fluid that came from object which is set to Type: flow, Flow type: inflow. I've tried to set the cup to be ...
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0answers
169 views

2.82 Fluid friction?

I'm wondering if there's an option that deals with the fluid / effector friction in the new Mantaflow system - I can't seem to find one.
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1answer
172 views

how to have dripping water when object comes out of water

Want to have my title come out of water, but its just completely dry, and have no drops of water in it to drip down. I am using flip fluids, and I have a cube with hole in it comes out of water but ...
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40 views

Blender fluid sim not making particles

Whenever I try to do a fluid sim with quick fluid it works but then when I delete the cube I use to emit the particles and change it to a filled-in circle it does not work and no particles are ...
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1answer
146 views

Show/hide mantaflow particles

This is probably a simple answer, but I can't seem to find it. I've already searched BSE, but I can't find a related question. How can I show/hide the particles in the mantaflow simulation? I ...
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2answers
118 views

How can I make a fluid (smoke) follow a particle system?

I'm using Blender 2.82.7 for this. I need to make a tornado, I created the particle system, I created fluid physics, but when I make the final bake the system does not behave as I wanted and it ...
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0answers
51 views

Fluid Simulation not working

Recently I updated my Blender and was excited to see the addition of mantaflow. I tried baking a simulation ensuring that the domain, flow, and effector is placed properly in the space with proper ...
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0answers
47 views

Blender 2.82a: How to create a texture that distorts according to a fluid simulation?

I would like to create a simulation in which paint / the fluid gets distorted and is shaded with a Voronoi texture for example. The texture should follow the fluid particle distortion. However, I can ...
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1answer
650 views

“Broken” mesh and particles extremely big - Mantaflow fluid simulation

I was searching for some new ideas and I found this beer pint, so I thought to use it for a mantaflow simulation of a beer. So I did the basic actions of creating domain, collision and inflow object, ...
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0answers
23 views

How do I get water to flow faster or slower in the fluid simulations in blender?

I am trying to figure out how to make a water simulation slower or faster in the fluid simulations in blender for example maybe I want to make a slower flow to simulate lava or maybe I want to make it ...
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1answer
1k views

Fluid not showing in fluid simulator

These are the settings of the flow object and the domain object. I think I got all the settings right but every simulation I bake does not show the fluid. I tried restarting blender but it keeps ...
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0answers
105 views

Filling an object (TEXT LETTER) with mantaflow fluid?

Im having no problems running fluid sims and using effector objects and obstacles.. however.. I dont seem to be able to get it to fill a simple mesh? Has anyone had any experience with this?
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40 views

Mantaflow simulation with animation

I have experimented with Mantaflow simulations. I have tried using a fluid simulation with a moving domain, but the simulation acts like the domain is still. Does anyone know how to fix this? Is ...
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1answer
167 views

Mac Blender 2.82 Simulation Issues

OK so I know I'm on the S list using a Mac for 3D these days, but it is what it is. I'm running 2.82 and the improvements in the UI are impressive. I'm a C4D user, but want to check out Blender's ...
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0answers
56 views

Fluid control objects using the new mantaflow system. Is this possible?

I've using the old fluid sim for quite some time and regularly use the FLUID CONTROL OBJECT option for text effects. I've just moved to mantaflow and i don't seem to be able to find an option to ...
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1answer
34 views

Fluid simulator not working in animation

I made a cup and some liquid inside the cup using fluid simulator. The cup is animated thus moving. However the liquid would leak out the cup and would be spilled on the floor. The cup is the effector ...
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1answer
98 views

How do I find the velocity of an object and use it to chaneg the colour of a material?

I am trying to make a material for a fluid simulation in blender 2.8.2 that will change the colour of the fluid as the fluids velocity increases. I have tried a few things: Both attempts were ...
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0answers
30 views

Blender 2.82 Physics results, raw numbers

Recently at my work we've been working on a research project where I take Ct scan results, convert them into .stl's, clean them up in Blender and then have been exporting them to a program called ...
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272 views

Mantaflow Liquid not rendering

So, I have a simple mantaflow fluid sim inside blender 2.82 (official build) and, when I render it out, it won't render out. It will literally take upwards of 10 minutes to render out a single block. ...
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39 views

Anyone having issues with Particles in Mantaflow on Mac

I'm having a very strange issue with 2.82. I had tried to screen record but the work Mac that I'm working from is on High Sierra and as such the feature isn't implemented. Basically, I can setup a ...

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