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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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1answer
241 views

Fluid simulation in moving object

I am working on animation in which I have moving object filled with liquid. Problem is that liquid is reaching over the mesh. Scaling does not fix the problem since the liquid does not follow up the ...
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2answers
126 views

Water simulation does not flow into the bucket

I wanted to make a simple scene where water is flowing into a bucket. I had set the domain nicely outside the obstacle i.e., the bucket and a small uv sphere as the inflow. After that when I bake it, ...
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1answer
57 views

Bake Fluid to affect Cloth

I was exporting the fluid as an .abc file and then reimporting it, hoping I could have it collide with my cloth. I know that the cloth would not affect the fluid this way but I thought the fluid could ...
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46 views

Flowing tears on moving head

As the title says, I want to have tears flowing from a pair of eyes but I seem to not know how. What I tried was to have a domain cube cover the head, the head (which isn't a separate mesh from the ...
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1answer
38 views

What should i do if my fluid falls through an object?

I want to make a shoreline scene, but my fluid always falls through my "floor". I dont know why (it's my first time with fluid sim). Does anybody know what the problem is?
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1answer
2k views

Nothing happens when baking fluid simulation

Blender File: https://www.dropbox.com/sh/f5t132aukwqmg0l/AADiffjRgnVy7CMPK-VkSs7Va?dl=0 I'm attempting something similar to this (https://youtu.be/Gk0uhBcLknQ?t=6m24s) (link should start at what I'm ...
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1answer
129 views

Fluid not working, stuck at midair

I've set a simple scene, big box containing everything set as domain, container inside the domain set as obstacle, icosphere at the center as inflow (shell, like the obstacle). What i got is this ...
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1answer
67 views

Make Fluid disappear

I am currently modeling a sword for a friend and I would like to animate a bloodline in the center of the sword... now is my problem, if I would do this by using a fluid, the fluid would be supposed ...
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1answer
166 views

Make an object stop interacting with fluid

I'm trying to make a mug disappear, so that all the fluid inside spills out. I'm using Fluid sim modifier for the coffee inside the mug. I'm having trouble getting the mug to disappear such that it ...
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0answers
57 views

Blender Fluid Simulator

I created a fountain and added a fluid simulator but when i tried to bake it. It started baking but the nothing happened to the domain or any of the object. I tried many things as reducing or ...
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1answer
47 views

Preview and Final Render Materials are Different

In my node editor I have the following Materials set for the water which is made with a fluid simulation. In the preview window it looks like this (Which is how I want it.) Then when I render out ...
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1answer
555 views

Hair Particle system and Fluid Simulation interaction

Making a scene with grass made with a hair particle system in a fluid simulation. I was wondering if there is any way for the hair particles to be able to sway based on the fluid simulation. If so how ...
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1answer
25 views

Fluid is not simulated at the target location

I've tried to set the S mesh to be a fluid or inflow object and have created a large size domain around it. However, the fluid is generated in the top left corner instead of around the S mesh. How do ...
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1answer
1k views

How to make my water look Murky?

Blender noob here again! I'm working on making a Swamp scene and I'm curious how I can make my water look murky/smokey. Would I need a smoke simulator in the system too? Or is it a materials thing? ...
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1answer
158 views

Better way for stopping simulations on timeline?

I have been working on a lot of fire and water sims for a project. The problem I am having is after baking the sims and then playing them back to see how it looks, the timeline gets "frozen" while it'...
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37 views

Liquid Simulation How to Stop Interaction with Grid Floor

Honey undesirably and mysteriously interacting with the grid floor. I've tried unchecking the box for grid floor display to no avail. The honey sticks to the underside of the grid floor. How can I ...
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1answer
464 views

How to melt an object then reverse the melt into another object

Hi I am trying to have a text that says "Hi" then melts into liquid, then that liquid reverse melts into text that says "my name is" then melts again. Does anyone have any idea how i can do this?
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1answer
109 views

Boolean modifier - surface vanishes

Situation: I am trying to animate boiling water. I based my idea on this youtube tutorial. Basically what it does is: Bake fluid sim of drops falling into a fluid object Rotate the domain by 180 ...
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1answer
450 views

Fluid simulation stuck

I am new to blender. I am trying to make a simulation of a fluid that comes out from a pipe. However, it looks like it's stuck at the pipe, even though some of fluid comes out. Its weird. My pipe has ...
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2answers
544 views

change the fluid amount in inflow

I want to make the fluid go to the end of u. These are my inflow and domain settings. But the fluid is stooping here. How can I solve it? please help.Thanks in advance.
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0answers
68 views

How to disable bounds on fluid sim?

I'd like to know how to make a fluid simulation where the domain does not act like a wall. In the smoke sim, you can enable smoke to pass out of the domain, but how do you do this in the fluid sim? To ...
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0answers
84 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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1answer
309 views

Can Blender 2.79 Fluid Physics act on Rigid Body objects?

I'm trying to have a flow of water rotate a solid-body propeller in Blender 2.79. But before I went any deeper, I got curious about a comment by a Blender Artist saying this: The fluid simulation ...
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0answers
563 views

Meta Ball Particle System and Fluids interaction

I'm studying the file offered by @ChameleonStyle in this answer. I do not understand how he did it. When I open the scene, I can see two layers. The first include a particle system linked to a ...
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1answer
173 views

fluid simulation showing and odd box instead of working

Need some help guys... Pressing object > quick effects > fluid give me this. Whats happening. Version 2.79.4. Not working here.. Tried with different shapes, new scenes, with and without ...
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0answers
162 views

How would I go about making a liquid swirl/ similar to the photo?

I'm looking to make a swirl out of yogurt similar to this image. I've tried doing some different simulations but I'm not sure how I could get the liquid to go somewhere specific or to twist it in a ...
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0answers
54 views

Fluid simulation baking

I am experiencing issues while following an introduction to fluid simulation. When I try to bake my simulation, either Blender crashes with the error "Error: EXCEPTION_ACCESS_VIOLATION" after a few ...
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2answers
142 views

Is there a way to render one layer

So I'm creating a room flooding video I've taken a picture of my room and and created a scene that has obstacles where my bed is and the walls are ect. What I want to do is render the fluid simulation ...
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0answers
32 views

fluid dynamic helix [duplicate]

I trying fluid simulator in Blender, and I wanted to make an animation where water flows from centre along to curve and screw along. How setup Inflow for this result:
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1answer
441 views

How to control the flow direction and fluid level?

As you can see here, I intend to make a waterfall which is more or less has been successful. However, Once i start playing the animation the water keeps filling up till the bounds of the domain. I ...
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0answers
128 views

How can I make a rigid body interact with a fluid simulation?

I am confused as to why the rigid body sphere is not making any sort of splash when it hits the fluid. I have the "export as animated mesh box checked, but that did not change anything. I would ...
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0answers
606 views

Water splash for advertisment

I modeled a shower gel and I'am quite satisfied with the result. I now want to make water splash around it similar to this picture I tried to "fake" it with particle systems but that didn't work ...
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0answers
280 views

Why is this fluid baking taking so long?

I've made a simple scene (for learning purposes), but I've found the fluid sim baking process started taking a lot longer than what I expected (about 3 hours on one of my machines). This is for a 4s ...
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0answers
132 views

Can't get rid of old data after copying fluid sim

My situation I have a fluid sim in which a cube standing in a puddle melts entirely into a puddle To make the melting simulation more realistic i set the speed of the fluid sim to a very slow pace. ...
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0answers
391 views

How do I do a fluid splash in blender

I tried to make a splash with fluid following a tutorial but something went wrong and I cant figure it out. Heres what its doing on the video link. How do I fix it?
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2answers
468 views

Fluid object going through obstale, changing size and shape

I was trying to simulate an melting ice cube by letting a fluid object (cube) slowly spread in its container. Doing this i ran into some weird glitches. The glitch that bothers me the most is that ...
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0answers
424 views

Stopping fluid inflow problem

I'm new to Blender, here is my problem: I've created 2 downward facing faucet inflows (Inflow Velocity X=0 Y=0 Z=-8) into a Tank that is half the height of the Domain. I want the Inflow to stop as ...
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1answer
474 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
595 views

Q:How can i Combine a fluid simulation with an ocean plane?

I want to create a boat that floats across an ocean for an animation something like this in Moana: https://gyazo.com/b6bae882baad57b4da22549bb50ade43 but I just can't figure out how to combine the ...
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2answers
755 views

How do I make a fluid simulation so it retains its shape till it touches ground?

I am trying to make one of those animation videos where an apparently heavy object is falling on a fragile object. But rather that heavy or rigid object turns out to break or be fluid. So I made a ...
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1answer
93 views

Fluid simulation - direct access to surface possible?

I'm working on a simulation of a fluid surface in a model "river bed". My aim is to study the development of the surface pattern over time during flow. I'm new to Blender - so here is my basic (maybe ...
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0answers
238 views

CPU Only at 40% during bake and render

My render and bake have recently started going by excruciatingly slow. My CPU is only at around 40%, and my GPU is sitting around 10 or 20%. I've been rendering a rather simple scene for almost 12 ...
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0answers
178 views

How do I colour a fluid simulation in Cycles based on velocity?

I want to assign a gradient to the water simulations I have. I want to do this by the velocity in the current voxel, so the fastest moving areas will be red and the slowest blue. How would this be ...
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1answer
547 views

How can I make the materials for this toon fluid simulation?

While browsing through toon style shaders on youtube, I came across this cartoon fluid test. I am pretty sure it is an emission shader, but I don't know exactly how to make it. This was originally ...
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0answers
33 views

2 Different Fluid Simulation Domians in one scene

How do I get 2 different domains in the same scene? I am doing this because I want to reduce bake time is there a way to achieve this?
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1answer
566 views

How to control start and stop of fluid simulation [duplicate]

How do you control when the fluid animation starts and stops? Because I want it to start a couple seconds in and then stop a few seconds later.
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1answer
3k views

What does the “Simulation Threads” setting in the fluid simulation do?

I was just wondering what that setting below the bake button does. Anyone know? Thanks in advance.
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0answers
380 views

How do you bake fluid simulation from command line in windows? [duplicate]

How do you bake fluid simulation from command line in windows?
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1answer
152 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
271 views

How to change inflow velocity attributes randomly while animation

Hey I'm new at blender physics. I want to make a fluid animation, made some tutorials about fluid but need to change velocity attribute randomly during the animation. Thanks for you helps