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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377 views

How to light liquid on fire?

I'm trying to simulate liquid being lit on fire, but only the fluid works when I simulate both domains (the fire domain is on the second layer). I tried to find a tutorial for this, but wasn't able ...
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484 views

How to create very realistic rain with a particle system surrounded by a fluid domain?

I am working on a scene for a short film in which it is raining on a desert. One of the shots will be very close up so I want the most realistic look possible. I looked at other tutorials on how to ...
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1answer
1k views

Is it possible to bake fluid simulation into blend file?

Is it possible to bake a fluid simulation into a blend file, instead of a separate cache folder? The main reason is, I'm using a renderfarm to upload animation files. The renderfarm only accepts ...
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2answers
1k views

My liquid looks like tiny balls not like a liquid

I made a liquid animation. It looks good, but it looks like tiny balls instead of liquid. How can I fix this?
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1answer
3k views

Prevent fluid to flow through the walls of an obstacle

I am trying to make a fluid simulation flow out of the orbits of this skull (I hope this doesn't violate any guidelines), as a little experiment / practice with fluid simulation. The result is not ...
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2answers
3k views

Blender as a fluid dynamics simulator

I want to ask if I can use Blender as a fluid dynamics simulator in a physics school investigation to determine for example the space travelled by a particle moving through a fluid, varying the ...
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1answer
1k views

How to animate small water surfaces in structures?

I would like to model a so-called stormwater overflow (used within a sewage system) which is a concrete chamber in which the water level is rising during a storm inflow until the crest of an overflow ...
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1answer
2k views

Is the ocean modifier better than the fluid simulation for making an ocean? [closed]

Is the ocean modifier better than the fluid simulation for making an ocean when it comes to visibility under the surface of the water, reflections and splashes in the water? Which one is better for ...
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1answer
156 views

Can I make a sim where "water" breaks a "glass window"?

So I want to make a sim where the camera starts in a hallway and moves towards a window at the end of it where a room is filling with water. When the room gets about halfway full or so i want the ...
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1answer
247 views

Operator Search: 'Free Data' not available in Blender 2.9 anymore?

I have a problem with caching my data when I try to run 'replay mode' for a fluid simulation in 2.9. In the 2.8x versions, you can 'free the data', when you search for ...
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1answer
2k views

Fluid: How to convert the simulation to a series of meshes?

Once you've baked your fluid simulation, you can apply the Fluid in the Modifier panel in order to get one mesh that you can edit etc... But how can you get the whole series of meshes, i.e. one mesh ...
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1answer
1k views

How to make fluid rotate rigid body

Is it possible to make fluid rotate a rigid body, like in water wheel? I have a stick, which is constrained to rotate around one axis, but fluid, falling from pipe, doesn't affect it
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1answer
1k views

Slow Motion Water Physics Settings

so does anyone know some settings to get slow motion fluid in Blender? Starting from a basic scene and tweaking settings to get slow motion fluid. Any answers are helpful and thank you for your time!
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2answers
2k views

Gaps between liquid and obstacles in liquid simulation

I am trying to make a simple liquid simulation of a liquid going down a carved path on the ground. I can't seem to make the liquid flow along the obstacle, all or part of it always seem to hover ...
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1answer
5k views

How can I offset the start of a fluid simulation

How should I offset the start of a blender fluid simulation? I have a short video with different cameras at different points, and I only want 1 fluid simulation at a time. Adjusting the start / stop ...
3
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1answer
424 views

Boolean difference modifier misbehaves with fluid sim

I have a scene where I am using a fluid simulation to splash water into an invisible diamond shape. I'm using a boolean modifier to remove (subtract) the jagged edges from the outside of the water. ...
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2answers
1k views

2D flow simulation over a surface

I'm very new to blender but keen to learn more. I have used a lot of 2 and 3D modelling packages as well as a number of GIS applications. I'm just trying to work out if I can model a fluid flow over ...
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1answer
3k views

Is there a way to render particles as if they were a single liquid?

I don't want to use the fluid simulator beacuse i've been getting more controlled results with the particles system feature + using a guide as a force field. What i'm trying to accomplish is water ...
3
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1answer
2k views

Baking fluid sim to shape keys

I've made a fluid simulation and it's working exactly how I want. I would like to save the simulation as a shape key-based animation, mostly so I can do another fluid simulation that interacts with ...
3
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1answer
48 views

Fluid simulation stays in its own space?

I am trying to make a fluid simulation in a very simple dam. I have read tons of documentation, videos and forum posts however I am not able to resolve my problem perhaps because I don't know exactly ...
3
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1answer
169 views

Lego Water with Dupliverts doesn't work!

I made a fluid object, I made a brick object. I set the fluid object to dupliverts in the object panel and added a remesh modifier set to blocks. I selected the brick, held shift and selected the ...
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2answers
2k views

How to fix this physics problem?

Hello everyone, How to fix this physics problem, the objects pass trough to wall. I increased the Steps per second and Solver iterations in scene settings > Rigid body world. Also, I set the shape to ...
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2answers
2k views

Make an object into a fluid

i am trying to make a fluid simulation of a metallic text melting to the floor and doing...you know, do what fluids do. My issue is that if i make the text a fluid and bake it, the shape gets ...
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1answer
1k views

Fluid ignores obstacle

Hello I am trying to make something like this https://www.reddit.com/r/Simulated/comments/8rt6wx/frosting_a_cake/ (I know this uses flip fluids addon, I am trying to recreate something similar with ...
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1answer
447 views

Why are these fluid particles not being blocked correctly?

I am doing this tutorial. I have this cylinder / lamp and an emitter plane (see arrow). Just below the emitter plane I closed the cylinder with a face. And checked Size Deflect. Also the cylinder has ...
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1answer
2k views

How to make water wall effect?

Go you have any ideas how to make this sort of an effect? I've tried to achieve this using water simulation, but it didn't turned out well. Using a texture looks like rational, but I have no idea how ...
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2answers
1k views

How to make Fluid Inflow follow bone?

I have made a very simple scne to test Fluids where there are two containers and a moving tap. Basically, the tap moves to one contianer and fills it up, then it stops and moves to the other container ...
3
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2answers
754 views

Unable to bake fluid after changing cache folder

So I've been studying Blender's fluid simulation and I realized that after I set the folder's path to somewhere else other than Window's temp folder (C:\Users\User\AppData\Local\Temp) the bake ...
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1answer
7k views

Fluid Simulation is still low quality even with resolution of 250

I am trying to make my fluid look realistic but it isn't smooth even with the quality set to 250. I have uploaded a video of it here: https://www.youtube.com/watch?v=E54ObJrXHiM Is there any ...
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1answer
243 views

Fluid on a deforming mesh Problem?

Im trying to show a downspout eroding the soil away as an example. I have tried: A. Using a boolean to deform over time the (ground mesh(obstacle) OR animating shape keys for the (ground mesh(...
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2answers
107 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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1answer
100 views

How to do a simulation of still water being affected instead of flowing water

Of all the tutorial videos on water simulation, they're all like water flowing from a point and then settling. How would I do it if I want the start of the animation to be an existing body of water. ...
3
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1answer
193 views

Help with smoke and liquid simulation in Mantaflow

Original Post This is the problem that led me to post this. Whenever I scale the domain of a smoke simulation, the inflow object's smoke also scales up/down. Applying the scale of the domain does not ...
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1answer
357 views

Fluid simulation and animation

https://www.instagram.com/p/Ba0fhHGAXxn/?taken-by=dkpatel25 As seen in above video I made the man using "control" property from Fluid simulation. How can I make the man walk or animate in any kind ...
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1answer
887 views

What is "Offset" in the fluid simulation "Bake" settings?

I've only just recently started using blender (this is 2.78a) and am amazed at how much can be accomplished with it. I have been playing around with the fluid simulation, but all the different ...
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1answer
2k views

Is it possible to pause and later resume a fluid sim bake?

I have a pretty heavy fluid sim bake going on... by pretty heavy I mean I estimate it will take two weeks to complete! It is likely that during that time I will sometimes want to use Blender for ...
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0answers
95 views

Mantaflow simulations causing strange diamond artefacts

I've create a fluid simulation with mantaflow and am rendering the FLIP particles themselves (no mesh). The simulation looks great (with a resolution of 96) but when it becomes quite turbulent there ...
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0answers
2k 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 ...
3
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1answer
621 views

Break apart grid pattern of foams in mantaflow fluid sim [closed]

In Blender 2.82, mantaflow was introduced, with a built in way to generate foam, bubbles, and spray. However, the particles all seem to be a bit too uniform, resulting in a grid like pattern. Is ...
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0answers
59 views

Waterfall Simulation looks terrible

Why looks my waterfall so terrible. The mesh isnt even stick together. It splits to often and i cant figure out why. I also backed with 300 but it doesnt matter. The splits are so annyoing unrealistic....
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0answers
440 views

Procedural Materials On Fluid Simulations

Been struggling with this for a while. I've made a procedural lava shader and I want to put it on a fluid sim. The problem is, all the mapping methods I've tried make the fluid travel through noise ...
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0answers
102 views

Fluid leaks even through two thick obstacles

In short: My moving obstacle leaks all the fluid that it's supposed to hold. I have tried tens of changes in the parameters (and all the solutions to similar questions), but it's not going to get ...
3
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0answers
906 views

Rendering fluid simulation and assigning material to water

I am working on some fluid simulations in Blender, however this tool is completely new to me and I am having some issues in rendering the output to have a realistic aspect. I have built a water basin,...
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0answers
125 views

Is it possible to programmatically get the underlying volumetric voxel grid from the fluid simulation?

I have some python scripts that generate and run a fluid simulation in Blender for me. To my understanding, Blender uses a voxel grid for it's volumetric fluid representation in the fluid simulator ...
3
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1answer
2k views

How can I model ultra-viscous, dripping wet objects?

I saw this on Reynante Martinez's site: I want to know how those fat drips were made. My first idea would be a fluid simulation with extremely high viscosity, but I couldn't get the same sort of ...
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0answers
340 views

Is there a way to delete specific parts of a baked fluid simulation?

I'm working on a fluid simulation right now. At some places the fluid is seen through the obstacles. Is there a way to select those "false fluids" and remove them?
3
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1answer
935 views

No inflow from one of two sources

I'm currently working on a small creek for learning purposes. I've built the main terrain and am now stuck on the fluid animation. This is my project so far: As you can see, there are two inflow ...
3
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0answers
45 views

How close is fluid simulation to being able to influence rigid bodies? [duplicate]

I embarked on a project to use Blender to simulate the behaviour of a wave energy device in order to establish its performance, only to find while learning fluid simulation that fluids cannot affect ...
3
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1answer
202 views

Particle and Fluid Forces driven by motion vector image data (XYZ vectors). Optical Flow

I'm looking into how to achieve forces in Blender particles and fluids driven by motion vector image data. Think "optical flow". This is possible in Nuke, Houdini, and other packages. It appears ...
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1answer
2k views

How to make this glass more realistic?

I have made this image : As you can see there is something wired going on with the liquid of inside the glass, in fact, I'm doing a fluid simulation here, it looks like the mesh of the fluid doesn'...

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