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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25 views

simulation cache playback

my question is how to make blender refreshes viewport playback cache every time when the timeline starts from the beginning, say i have 250 frame, everytime it plays all the 250 frames and jump back ...
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423 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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48 views

Gas flow through effectors

I've been attempting to make a rocket engine simulation, and I'm currently on the basic stages, where I'm trying to get fire and smoke to flow out of a nozzle adhering to the physical properties of ...
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135 views

Mantaflow Problem

I'm having an emissions problem in MantaFlow under the released version of Blender 2.82. While following a tutorial video, I add a circle to the inside of a mantaflow domain. I then switch to EDIT ...
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18 views

Keeping Rigid Body Fracture Objects visible up until they turn into fluid

Hey I'm trying to simulate a fractured cube falling, and when it makes impact with the ground I want it to become fluid, keeping the pieces velocity. Im using Flip Fluids. I have it all setup, but I ...
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1answer
348 views

Plane and Grid are not working as Fluid Effector Collision in Blender 2.82

In my scene the liquid goes through the plane or grid, no matter what the settings are, but with a cube it works as it supposed to. I've tried with option "is planar" checked and with surface ...
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1answer
163 views

Moving object removes fluid while using the FLIP Fluid add on

I have a ball that moves through an inverted obstacle (it has the shape of the letter 'P'). When the ball moves through the liquid, it doesn't seem to move and push the liquid, but it appears to ...
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62 views

Liquid simulation (liquid doesnt interacts with collison object)

my liquid just passes through the collision object in blender 2.82.. Why it is so??
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44 views

Water simulation

I'm having trouble creating a water simulation. I want to create a short video of water flowing through a pipe for a product that i want to build and market. Anyway, to create this in Blender, I first ...
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317 views

Problems with Mantaflow fluid simulation with very small flow source compared to domain size. Collision effector boundary not being respected

I would like to do a simulation with a fluid flow source which is very small compared to the domain ( the final result will be about 30 times taller than it is wide). However, it doesn't seem to work ...
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1answer
168 views

Fluid - Baked Mesh is Shifted

When I bake my fluid data it comes out perfect but soon as I bake my mesh it gives me a wireframe of simulation and the actual fluid simulation right under it. And here is the one with the mesh data ...
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120 views

Blender 2.82 particle motion blur

So I'm working on a fluid simulation with the new blender 2.82 features(cycles), where I have foam, spray, and bubbles enabled. All is well and it renders properly until I enable motion blur, which ...
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1k views

Mantaflow Fluids Not Working

I have tried many times to create a simple Mantaflow fluid simulation in Blender 2.82, but it almost never works. Edit: I tried saving the file, and baking the whole simulation. I also fiddled around ...
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35 views

Missing some options

Hi I Want to make Water in Blender but I do not have all options all I need in Fluid menu
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287 views

Mantaflow not working in 2.82 release

I have repeatedly tried setting up a simple flow and domain liquid simulation in 2.82. Following tutorials very closely. The strange thing is it works like 1 time in 6 build attempts. But most times ...
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1answer
328 views

How do I enable motion blur for Mantaflow fluids?

How do I enable motion blur for Mantaflow fluids? I'm using 2.82
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1answer
569 views

Blender 2.82 Mantaflow will not fill volume

Using Mantaflow with the new Blender 2.82 release. Trying to fill a 3 meter long tank with water, but the fluid sim only sloshes on the bottom of the tank without filling up, even after 800 frames @ ...
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38 views

Mantaflow (Blender 2.82) - How can I add speckles attracted by gravity inside a liquid?

So the effect I'm trying to make is having a container filled with water, and inside the water itself there are small particles and speckles that float in the liquid itself but also are affected by ...
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2answers
1k views

Mantaflow fluid does not take the shape of a sphere (Blender 2.8)

I created a sphere and set it up as a container for Mantaflow Fluid. I created another sphere and set it up as an inflow object. No matter what I do and how I play with the values, I can't seem to get ...
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14 views

Use Text as a container

I am wondering if it is possible to use a letter, or a group of letters (generated using the type tool and converted) as a container/ obstacle for a fluid/ inflow.
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1answer
134 views

Is it possible to limit the volume of fluid ejected from a mesh? 2.82

I am working with some fluid simulations in 2.82 which I am planning to add to my scene. My goal is to create a fluid sim which looks like rain water flowing off a roof. So far I have a cylinder set ...
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1answer
452 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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56 views

How to simulate vector sound waves in Blender?

I am making an animation where I visualize audio in the form of a vector sound wave. I am trying to make this "wave" with a line of stretched cylinders. The goal is to make waves that look like this ...
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17 views

Smoke following particles too much

So, I have a simple explosion scene set up in blender 2.82 and, when I preview the smoke, it's following my particles in so that the smoke just looks like a bunch of smoke bombs being shoved out. What ...
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1answer
58 views

Fluid Bake Not staying

I baked some fluid stuff and it was great. But when I saved the file and uploaded it to my online drive, the fluid bake didn't show up and I had to re-bake it again. How do I keep the bake so that I ...
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1answer
28 views

When building/compiling flip fluids, I just get a bunch of error s and a weird, partial build

Like the title states, when building flip fluid I get a partial build that can be installed as an add on into blender, but when I try to bake a sim it tells me that it cant find "libblpyfluid.dll" and ...
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1answer
50 views

Weird Ripples on Shape While Using Fluids

I'm trying to create a heart that fills up with orange paint revealing its shape. However, I'm getting weird ripples on the sides. What am I missing? Here's a link to my Blender file:
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1answer
26 views

Fluid starting point

I want to run a fluid simulation, but I want the fluid to start at some other frame than the start. How do I make the simulation start on a farther frame?
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1answer
35 views

Bind water animation to keyframe

I'm currently making a bar scene. One of the guests is holding a keg upside down, I made the water animation for it. But I want to make the camera go through the stream of pouring beer at frame 180. ...
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0answers
45 views

Use Fluid Sim to Generate Smoke

I'm attempting to use Blenders fluid sim to create a smoke simulation, as I need to be able to export an Alembic (.abc) file into the Unreal Engine. As far as I've seen there are no addons to allow ...
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0answers
407 views

Mantaflow not baking fluids

So, I've created a simple fluid scene in blender (Domain, Inflow object etc.) but, nothing happens. I could do fluid with Mantaflow 2.81 Mantaflow branch back when I had it but, they've changed some ...
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1answer
20 views

floating fluid with force fields

Is there any way I can make fluid float in the air with force fields? I am trying to replicate this: Also, is there any plugin that would help?
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1answer
558 views

Mantaflow fluid bake at high quality?

I have been using Blender's fluid physics for a while now, and I have been wondering if it is actually possible to do a fluid bake at 1024 quality. What would this look like, and how could I achieve ...
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0answers
57 views

Rendered image is different than the frame in the baked fluid simulation. Blender 2.81

I have baked the fluid simulation and when I started rendering the animation, initial frame render the geometry as baked and next frame look different. If i render single image not an animation then ...
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2answers
236 views

Baking physics on several machines / Combining cache

I have a smoke animation in blender. I wonder if it is possible to split the baking process of Physics / Smoke Simulation on several machines. Can I run part of the simulation like Frame 1 to 100 ...
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0answers
19 views

Calculating fluid inflow to a rigid body

I have a fluid simulation that has an inflow object whose position in the scene is calculated by the rigid body simulator. Now what I want is the fluid in the simulation to continue to come from the ...
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1answer
376 views

Blender 2.82 Fluid Simulation can't resume baking

I have simulated a pool of water and was baking the mesh for the water. My system crashed and I could not resume baking. I backed the mesh folder up and freed the mesh. I put the files back in place ...
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1answer
193 views

Documentation on the mathematical models used by Blender physics engines

I need to know which mathematical models Blender uses during rigid body simulation and fluid simulation (e.g. Lattice Boltzmann). Is there something like that in the Blender manual or do I need to ...
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0answers
149 views

More bubbles in fluid simulation

I am making a fluid simulation similar to this: I want the fluid simulator to create bubbles like in the picture. Blender fluid already creates a few small bubbles, and more depending on the quality ...
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2answers
69 views

Physics: Liquid Splashes too much

I have a problem with physics. I am trying to make a spoon removing a fluid in a cauldron. The problem is when I introduce the spoon into the liquid the liquid splashes a lot. I tried changing a lot ...
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0answers
107 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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1answer
92 views

Problem with Fluids Tespassing Obstacles (bottles, cauldrons)

I have problems with physics. I modeled a bottle and I duplicated part of the bottle for the liquid. The liquid has a face on top so it is closed. The bottle is open on top. I added a cube for the ...
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0answers
16 views

Smoke jet simulation? [duplicate]

I would like to animate a jet of smoke as in this video clip (from the movie Interstellar). Here's a short preview: Note the important elements are: The smoke is translucent The smoke is very fast ...
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0answers
46 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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1answer
298 views

Displaying airflow inside of an engine model

Okay so basically I have a model of an engine. The purple shows where all the gas and yes gas not liquid should go. It must collide and be held in by a couple moving parts. The first thing I tried ...
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1answer
37 views

Physics simulation and image plane

I am trying to make some 3d video effect. Is it possible to apply physics simulation on an image/video plane such that it interact with other objects in the scene? E.g. can a video becomes fluid and ...
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0answers
27 views

Need help on moving multiple rendered images(frames) over a stationary plane

I created a dry fountain animation using fluid physics. The chosen objects were a cube(domain), cone(inflow) and a plane(as an obstacle). I baked them to create the fountain. Later I rendered the ...
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0answers
30 views

Fluid animation seems to disappear in some frames

I wanted to create an commercial ad for a juice brand and was testing out fluid simulations.. for now my simulations seems to work properly but as I render the animation the fluid seems to disappear ...
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0answers
20 views

How to make a text coming-up-out of water simulation?

I'm working on a project for school, and I want to make a simulation of some text rising up out of some water, with water dripping from it, sliding off of it, etc. I've already tried finding ...
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0answers
18 views

How to Make Custom Mesh Hollow/Empty? [duplicate]

I am new to blender and trying to create a custom mesh (specifically, a trough to hold a fluid, see image). I have deleted all the edges on the top of the mesh, yet neither fluids nor meshes can enter....

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