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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73 views

is there any way to get to velocity of a fluid and use it in the cycle material editor

I'm trying to use flip fluids to make lava is there any way to use the motion blur vectors, or get the velocity to mix a material. or in the script editor is there anyway to drive that.
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716 views

Converting an obj sequence to a .bobj fluid sim cache?

I'm wondering if there is any way to accomplish turning an obj sequence exported from realflow into a .bobj fluid cache that I could then trick blender into loading as a native fluid sim cache. So far ...
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93 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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1answer
475 views

Fluid simulation only shows the domain

I was making a fluid simulation, but when I try to bake it, it only bakes the domain. The fluid doesn't appear from the inflow. Do you know why? Thanks. This is what appears when i render
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372 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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482 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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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 ...
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57 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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408 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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101 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 ...
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897 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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124 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 ...
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332 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?
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1answer
199 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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112 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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33 views

Fluid Sim not working when using a small flow object

So i'm trying to create a fluid sim, using a UV sphere as the flow. I have added a cube as a domain, following CG Geek's tutorial. However, when I scale the flow object down to a small size, it does ...
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101 views

Is there a way to make a fluid collide with another fluid?

I want 2 fluid simulations to collide together. However, there isnt an option to have a fluid be both a domain and effector. How would I make 2 fluids collide? Here is an example: The picture isnt ...
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64 views

How to animate small fire flames

I am just starting with blender. So, sorry if my question seems dumb. I saw some videos on quick animations and I am amazed with it. However, fire animation seems not to work when I scale the domain ...
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1answer
84 views

How to make a particle simulation like this?

So here is the reference https://www.instagram.com/p/CHijzp2gVt7/ I don't ask for like exact guideline how to make it, but if you can throw me a few steps or tutorials for something specific as this. ...
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66 views

Emulate realistic liquid inside a bottle for animation

I am working on perfume bottle design. I am trying to create perfume in the bottle. When bottle is rotated, perfume stays static. What's the way to rotate perfume when bottle is rotated, or even ...
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655 views

Using full CPU to bake mantaflow simulation

I have dual 8-core Xeon e5-2780 0 (2.7ghz) processors, and 128gb of RAM. When trying to bake mantaflow fluid simulations, even the simplest simulations take forever because usually it is only using a ...
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129 views

(V2.83.0) Mantaflow fire + gas - How to scale emitter

I have been testing mantaflow for the last few days and have a simple problem. I want to create a rocket launch animation. Now fire and smoke should come out of the engine. This works great. But the ...
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522 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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613 views

Blender 2.82 Liquid Simulation: Flask mesh as an obstacle just passes through

I have a flask mesh (UV Sphere+Cylinder Bridged -> Solidify Modifier -> Subdiv Modifier), applied as an obstacle in Bender 2.8 Mantaflow sim. The liquid just passes through. I double checked the ...
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177 views

Mantaflow in Blender: Help with understanding the vertices values in the generated mesh files

I'm currently trying to acheive the following: I'm using Mantaflow + Blender to create a fluid simulation. Then I'm exporting it as Alembic, and import it into Unreal Engine (Aka ue4). In UE4 I want ...
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39 views

How To make fluid human model and slowly dissapear?

i've been wondering how to make the scene like image shown At the first image, the character is fill with fluid, then the character melt down. Can this scene be done in fluid / flip fluid blender ? ...
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143 views

How to Create Shaving Foam in Blender 2.8

I really need to create a shaving foam shot for my final university short film, if anyone can help me with some professional techniques here are the storyboard images : Thanks in advance, Best ...
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610 views

Blender Snow Simulation

How to Create This Snow Simulation.
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225 views

fluid leaking through obstacles

I'm a beginner to blender, so please ignore my mistakes and be kind enough to guide me through this :) I've scene this question before, but never got a satisfactory answer. I'm working on two ...
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53 views

Weird dotted pattern in fluid simulation

I tried to simulate honey spilled from a bucket. The problem is that there is a dotted pattern on the simulation. What is causing this and how to fix it? The result: My settings:
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94 views

Imported Alembic (Animated mesh) I need it to have same # of vertices for fluid sim

I am working on a project where I plan to have multiple fluid sims running, I am having problems with my imported animated mesh, where each frame has different number of vertices. (This has previously ...
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157 views

Fluid is not falling towards gravity

I am animating a cube with a fluid in it falling or'jumping' on two objects and then ending on surface. But my fluid keeps falling towards the side where it was falling on the start. I have turned on ...
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75 views

Fluid does not reach the bottom of the domain - why not?

I am attempting to create a fluid simulation and I have created a cube for the domain (currently selected): The other cube has its type set to "fluid" and the angled rectangle is set to "obstacle". ...
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1answer
78 views

Strange ladder effect on fluid

I have an issue I seem to keep coming across with the fluid simulation; I seem to be generating a strange 'ladder effect' where the fluid spreads out regular intervals as shown in the image below. ...
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60 views

SSS + fluid render issues. missing parts

I am trying to render some fluid with SSS shader but I am getting some strange behavior. On the left you have a screenshot of the preview and on the right you have the render where you can see the ...
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242 views

2.78c | Changing fluid gravity direction results in really weird behaviour

I have a rather simple fluid simulation. My gravity is at -9.81, and it works nice, but I have animated the gravity and when it changes from -0.001 to 0 or a value greater than 0 the simulation breaks ...
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1answer
326 views

Fluid simulation pours into the cup in a box shape and won't spill

I was working with the fluid simulator in Blender, and I wanted to make an animation where water flows into a cup and spills out. When I bake the fluid it pours into the cup in a box shape, even if ...
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0answers
414 views

How to recreate foam when sea waves impact on surface

I would like to recreate foam when my sea waves impact and flow through the texture of my geometry: As you can see the flow recreates a nice interaction but still it does not look completely real. ...
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0answers
35 views

Size of fluid increasing with no understandable reasons

Initial volume: After rotating, size of fluid became bigger:
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598 views

How do I create a waterspout/vortex?

I need help on how to simulate a waterspout/swirl/vortex like the one in this image.
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2k views

Smaller drops in fluid simulation

I want to make a simple straight fountain. I used fluid physics - cube inside the domain is inflow type (Z velocity: 2). It looks like this: As it can be seen fountain is spurting with "compact" ...
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428 views

How to bake fluid and render at once

I am working on some blender projects with fluid and so I wonder how can I make my computer bake fluid and render with only one click. For now I always baked fluid and then clicked again to render. ...
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0answers
416 views

Offsetting tracer particles in a fluid simulation

I am working on an animation where I am using fluid tracer particles as a smoke flow object, and I have run into a problem. To get an idea of what I am trying to do, see my test render (of a simpler ...
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403 views

liquid inside complex shape?

I am working on this complex object. I want water to flow inside it, but, the liquid keeps escaping everywhere.
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51 views

Fluid physics very low res when poured into an obstacle that moves

I am creating an animation of an obstacle filling with fluid, and the obstacle is moving. When the obstacle is still the animation looks something like real fluids. When the obstacle/vessel is moving ...
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0answers
202 views

Fluid simulation no longer works

I'm trying to get some kind of Intro to work in which a chemical fluid turns into text. I was almost finished, but I can't get the thing with the fluid to work! A single drop should drop into an ...
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0answers
263 views

fluid simulation baking error

What I am trying is following: I want to "melt" a human body, so that the body turns into water and splashes onto the ground. OR that the human body is melting. Basically: to turn a more complex form/...
2
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1answer
205 views

How to create physically accurate boat moving through water

I am am making a short realistic animation of a sailboat going through the ocean. I have an ocean modifier with the time animated. I have a plane shrink wrapped to the ocean and the sailboat model ...
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1answer
723 views

how to make object float in water

How to make water pass through pipe with object link leafs and dust https://youtu.be/qGD1bD44B70?t=13s as seen video i want to make same as like they would make the leaf float wih water, I want ...
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21 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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