Question on liquids

[Yannick]

Hi,

Can someone let me know if it is possible to expand a liquid? I am trying to get more volume.

Also is there somewhere were I can the have the definition of the different Render Mode in the rendering/surface section?
When I use solid geometry on my liquid, I get a nice smooth result but a few holes do appear.

I am using this version:
Phoenix FD for Maya 2015, version 2.2.0 from Aug 16 2014, 06:00:42, revision 24851

Thanks,

Yannick

[Ivaylo Katev]

would be better if you describe the goal of the simulation, i'm sure we will find a solution.
the rendering modes are different combination of the old controls (solid mode, geometry, etc...) attach some image to see the holes, perhaps it's not up to the mode.

[Yannick]

would be better if you describe the goal of the simulation, i'm sure we will find a solution.
the rendering modes are different combination of the old controls (solid mode, geometry, etc...) attach some image to see the holes, perhaps it's not up to the mode.

I am trying to get a liquid running across a surface but it can get quite thin in some area. I was wondering is there is a way to increase the internal pressure on the liquid to have it to expand a bit.
I have attached my file. The liquid is been release a bit like a block sink been unblocked. I am trying to have a nice flowing liquid with smooth details.

Liquid.zip

Regarding the surface/render mode, I just want to understand what each option do. What is the difference between solid, static mesh, dynamic mesh and maya mesh.

Thanks,

Yannick

[Ivaylo Katev]

you can make the liquid to expand, but it's a wrong way. in 3ds max it's already forbidden, in maya is still permitted, but would be better if you attach an image to see it and to decide how it can be improved using legal way.

[Yannick]

Ok a few more questions:

Is there a way to reduce the pointy end on the fluid that you can see here:


Also, if I increase the grid resolution, I get like a change in scale.
On the image here:

the small sim looks like a massive waterfall. I wanted more resolution but keep the roundness and scale of the smaller resolution.

Any tips?

Thanks,

Yannick

[Ivaylo Katev]

these points in the air are actually droplets, seeing that you use viscosity, this is definitively instability, the most probably reason is the surface tension.
increase the spf to make it stable.

[Yannick]

my spf is now set at 20 and I still have some jagged edges.
Anything I could do to smooth my sim even more?
Thanks,

Yannick

[Ivaylo Katev]

well, 20 is high enough, switch off the surface tension, i suppose this is the cause. the viscosity will produce round liquid without surface tension anyway.

[Yannick]

Hi Ivaylo,

thanks again for your help.

I managed to get a nice sim with 39M cells.
Is there a way to increase the scale of the liquid, see the attached image, I want to have bigger drops but keep the scale of the scene. This is why I have been asking about internal pressure, if I could increase the internal pressure of the liquid, I would get larger volume in my drops.


Thanks,

Yannick

[Ivaylo Katev]

what is the scene you trying to do? i mean not in technical language, just a description of the goal

[Yannick]

what is the scene you trying to do? i mean not in technical language, just a description of the goal

Here is on of my earlier test:

I am trying to get more volume in the liquid.

Thanks,

Yannick

[Ivaylo Katev]

ok then, make the liquid source to have temperature above 1, let say 8.
this will give you a liquid that expands in volume, but this is not the right way. my what you are trying to achieve was not technically, i was expecting the final goal description, for example "a waterfall" or "pouring milk in a glass".

[Yannick]

I work with:
Phoenix FD for Maya 2015, version 2.2.0 from Aug 16 2014, 06:00:42, revision 24851

There isn't any temperature in the source.


I was playing with the surface level, which sort of did what I want but I couldn't go as far as I would have.

Thanks,

Yannick

[Ivaylo Katev]

right, it's because you are in liquid mode. the liquid mode actually has temperature set to 1, you can change it by the script or switch the mode. i'm not familiar with the maya version of the software, but in max there is already clamp of the value, it's possible that in maya there is still no clamping. the "temperature" of the source actually means the liquid "density". when you set the temperature above 1, the released liquid is in compressed state and starts to inflate, growing in volume.

[ivaylo.ivanov]

In Maya, just change this to Fire/Smoke and you will have all controls. The Liquid mode is just an UI preset to simplify the interface.