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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68 views

Help me make a waterfall

It has been 3 days now, countless YT tutorials, new and old, searchign on Blender Stackexchange and I just can't make it work. Additional info: I understand the basic concpets and the objects needed ...
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35 views

How to mix two fluids of different color using blender 2.82?

I am trying to create a simulation similar to the one in this video https://www.youtube.com/watch?v=MLwCFOsgYrI&t=497s using blender 2.82 and the MantaFlow tool. I don't know how to separate the ...
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81 views

2.82 fluid simulation size (scale) / particles size (scale)

I try to use 2.82 to play fluid simulation. First I use default size and run simulation and get some result. The particles seem well in view port (as my Screenshot). My domain size is 1.919 and my ...
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25 views

I cant give a wave modifier to fluid domain. Help?

I have an issue and I am really desperate right now. I am trying to give a shake to my liquid. I have a tube filled with a liquid. The tube is my domain and my liquid is at rest at the beginning. I ...
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16 views

Object-aligned initial velocity for fluid sim in Blender 2.8

Quick question here. Does anyone know if there is a way to make the initial fluid velocity relative to the local object coordinate system instead of the domain/world system? I'm trying to make a lawn ...
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38 views

I can't find object control in fluid simulation blender 2.82

In the older versions of blender the fluid physics had the option of making an object a 'control object' to manipulate the fluid flow with its shape. Now in 2.82 i can't find this option and i still ...
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39 views

Blender fluid simulation fluid not colliding with effector's inside

I'm trying to fill a water bottle in blender but when I set it as effector the fluid from the fluid source passes directly through it, I don't know what to do help. Here is the blend file
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Blender 2.82a - Fluid simulation viscosity problem when increasing resolution

I'm playing with Blender 2.82a fluid simulation (this stuff is really cool), but I'm encountering a weird behavior when trying to use the viscosity settings... I trying to use the "honey" viscosity ...
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36 views

Mantaflow effector not affecting my liquid sim

I am trying to move an effector cube through the liquid, but moving cube is not affecting liquid. here is my blend file, https://blenderartists.org/uploads/short-url/dNjuBxIVXEXHiFyUrAeHqHYYcr6.blend ...
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29 views

Trying to upload project with Mantaflow to RebusFarm getting error

So I did this little animation clip with fluid simulation using mantaflow inside of blender 2.82a everything is baked but I'm getting an error when trying to upload to RebusFarm. Was not bak... "...
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Mantaflow 2.82 liquid mesh was fine then turned back into container cube shape

So I'm a 2 months old noob and running 2.82a. Baked a liquid mesh yesterday and everything was fine. Saved and closed. Opened the project today and the mesh is back into the original cube shape of ...
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20 views

How to Stop a fluid domain?

I have a fluid sim and it keeps on going for 20 frames and them becomes a cube. How do I stop this sim after 8 frames?(In a beginner!!)
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How can I reduce the friction of Mantaflow colliding with effectors?

Just experimenting with liquids in Blender (I’ve only just got into doing fluid sims). Finished this tutorial and did some experiments of my own with collision effectors, such as some whiskey dropping ...
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100 views

Why does my Mantaflow waterwheel not work?

Apologies if this doesn't light correctly, I omitted the HDRI I was using to save space for upload and download of the .blend. Plug in your HDRI of choice and the scene should look fine (or turn off ...
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34 views

Blender Fluid Simulation Not Working

I have been meaning to ask this question for a while I used to do fluid simulations a lot and when they changed to flip they just don't work anymore. In the viewport the only thing that is showing is ...
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28 views

How to delay liquid->geometry in fluid simulation?

i want to simulate a waterdrop hitting a settled water surface using the fluid simulation in blender 2.82. For that i fill a bowl with water the first x frames and let it settle a while. Then after ...
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Learning fluid simulation with blender 2.82, can't get the water mesh where i want?

I'm trying to learn the fluid simulations on Blender 2.82. I want to splash some water on the ground, but unfortunately, the mesh is always above the ground, it's like there is some offset between the ...
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25 views

How to apply boolean on liquid?

I want to create a fluid injection like effect in a solid. For this maybe I can use the boolean modifier. But how to select the fluid on which I have to apply because fluid is not inflowing from a ...
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2answers
118 views

Can we make our fluid domain object from a cylinder?

I'm a beginner and wan't to know more about the fluid domain objects. Is it possible to make our fluid domain object from a cylinder? A lot of tutorials on YouTube use a cube for it. I have also tried ...
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51 views

How can I simulate buoyancy in a water simulation?

I want to make icebergs (I don't know if I have translated that correctly) crash in a water simulation but they should interact with the water and have buoyancy and the water should interact with them....
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1answer
108 views

Fluid sticking to surface (2.8)

I am trying to make a beach. When I tried simulating the fluid (2.82 mantaflow), it went mostly well. However, I noticed that the water would stick to the entire floor when all I wanted is that around ...
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12 views

i'm having a trouble in fluid

heyy can you kindly help me fix my fluid? so i am completely stuck in 2:16 https://youtu.be/GqtuBCpxO0Q (or you can see it on the pict i shared) where this should change as shown like in the 1st pict, ...
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18 views

Speed vector blurring not working

Ive got a fluid sim in v2.82.7 and is rendered with Cycles. I am trying to use the 'use speed vectors' in the fluid sim while using the vector blur node but it blurs nothing. I do have the vector pass ...
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18 views

Water is not staying in domain

After the water bakes, it acts was if the domain is in a different place and the outflow box is not working. I am using Blender 2.83
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19 views

How to make Inflow object not impact the fluid simulation?

I'm trying to render an animation of water dancing. I'm using an animation and a character from Mixamo and designated it as the inflow object. The simulation works and follows the character just fine ...
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i get trouble finding my fluid, i'm a beginner

i was following this tutorial on youtube https://youtu.be/3lvpNM1DrYU and i'm having trouble finding my fluid options, you may see it on 5:58 in the link i shared the picture bellow is how my settings ...
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12 views

Different gravity for different fluid shapes

My scene is pretty straightforward I have 2 UV spheres that are my fluid geometry. What I am wanting to achieve is the left sphere will fall to the right while the right sphere will fall to the left, ...
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44 views

Blender 2.82 - obstacle is missing

does anybody know where I can find the obstacle type, volume shell in fluid in Blender 2.82? All my objects which I'll fill with water can't hold it. It flows through. I read it's possible by using ...
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31 views

Glass BSDF Casting Dark Colour / Shadows

Blender 2.82: I am baking out a fluid sim and mesh, and applying a glass BSDF shader for the transparency. When rendering out, it gives a dark tint to the glass material, on top of the surface it is ...
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77 views

Where are the 'obstacle', 'volume initialization' and 'slip type' fluid options?

I downloaded Blender and I have been trying to do the fluid simulation. But I can’t find the, obstacle, volume initialization and slip type amongst other things in the Fluid panel.
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62 views

Mantaflow : Why is my fluid not showing up? / Why is my fluid going thourgh my mesh?

I wanna create a forest landscape with a river in it. I'd like to create the river using fluid physics, for realism and training purpose. Here's my scene: Pretty easy scene: my river bed is set as ...
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20 views

Cloth-like simulation but without creases

I'm new to blender and I wonder how difficult it is to achieve the following. Imagine a scene with small houses and skyscrapers made out of Lego bricks. Now imagine a very thin and soft scarf that ...
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20 views

Morph water shapes objects from one to another one in mantaflow fluid simulation is possible?

Is it possible to morph fluid in domain to shape of an object (no time reverse solution)?
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55 views

How to generate fluid particles in geometry bulk

While simulating a freely falling, vertical, right cylindrical block of liquid water I found that the particle system generated by Mantaflow only traces the outer surface of the cylinder mesh, even ...
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13 views

How to use fluid to turn an object into a liquid

this has proberly been asked before but I cant find an answer for the new Blender. This is what I want but the video seems old and I dont have the fluid options that he is using. Thanks. video
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12 views

Graphics issue? Fluid does not animate after scaling my domain or inflow source

Disclaimer, I'm brand new to Blender (running 2.82a). I have a DELL Precision 5510 laptop, Nvidia Quadro M1000M GPU. I've watched many many youtube videos on this topic. When I first create a Domain ...
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24 views

Creating a sponge absorbing water scene with fluid simulator

I'm crating a scene where a sponge slowly starts to absorb water. I simply want the water to already be in the box but every time I playback the simulation, the water doesn't full the box. I'm also ...
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21 views

Fluid Modifier Errors, trying to keyframe creating and use of inflows. Runs forever…?

Im trying to finalized this fluid simulation for my capstone and now that my code is running it appears i've opened a pandoras box of errors. Why wont the keyframes appear as they would if i were to ...
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19 views

How do I give texture to a liquid?

I want to make my textured objects to turn into a liquid. Here is an example with solar panel: But I can't get the texture to mix like it was liquid: No one of the texture coordinate outputs work ...
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120 views

How can I make Mantaflow smoke fill a collision shape?

I'm trying to achieve the effect found in this question and it's attached .blend file - however, with Mantaflow (I assume), the answer no longer works. I'd like to be able to fill a text object (...
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9 views

Assistance with Fluid simulation in 2.8 using FLIP

I have tried to get the simulation to work but I am unfamiliar with the way 2.8 handles simulations. I have read the documentation but cannot get a mesh to generate. Included is an image of what ...
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1answer
37 views

No animation in Fluid Simulation

I work in version 2.82. I have a problem with mantaflow fluid. At the stage of preparing the file, after setting the settings - I can not play the animation of the water. When I click play, time ...
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148 views

Mantaflow bake fluid from command line, “NameError” : not defined

When trying to bake fluid from command line using: import bpy bpy.ops.fluid.bake_all() I receive the following errors: ...
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19 views

Anyone know why I'm not seeing options in fluid type?

I'm using this youtube tutorial for reference: https://www.youtube.com/watch?v=370Q4COgMqo I've been able to set the domain cube, but cannot set the 'fluid' or 'particle' option. I can only see the ...
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74 views

Particles: How to stop object from sinking into mesh?

As you can see in the picture, no matter what object or plane, they sink halfway almoststicking to the bottom of the plane. I haven't found any solutions on this yet and figured it would be of great ...
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92 views

Blender 2.82 Mantaflow Bug

I'm currently trying out the new fluid simulator in Blender 2.82, but I'm having a problem. I was first making some models fly around with rigid body simulations. Then I baked that simulation on each ...
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1answer
41 views

Keep particles from fluid simulation in render?

When I bake a mantaflow fluid simulation, Blender displays it as colored particles before the mesh is baked. Is there a way to keep these particles without baking a mesh and have them in the final ...
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39 views

Fluid is not showing up in rendering view

Can I get some help, I cannot see the fluid in the render view. It shows up in the render mode, but once I press f12 to render it, it does not show up the fluid. I baked Data, Baked Mesh, Bake ...
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20 views

Fire sputters out

I can't seem to find an answer to this, I apologize if it's a duplicate. (yes, I've increased the end frame in the fluid cache settings) I've got this fire (pretty much exactly followed https://www....
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1answer
15 views

How to instance/copy smoke sim?

I made a smoke sim on hanging pot in Sponza scene. Now, I want to make instances of this sim. I also tried saving Final openvdb baking but when I import it, it give error like failed to load: ...

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