initial fill up in 3dsmax

V-Ray V-Ray Common Public
1

Hello,
to speed up the simulation, i turn the initial fill up to 70%.
But instead of filling up the body it fill up the grid.

I look at this thread but it is for maya not for max: https://forums.chaosgroup.com/showthread.php?77977-getting-the-brush-mode-to-work&highlight=fill+object+liquid

Thanks

2

This solution doesn’t work:
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Init part of the grid with liquid or other content

Since Phoenix FD 2.1 there is an automatic initial fill up of the grid. In many cases, however, you may need non rectangular area to be filled or in general to convert any geometry into liquid.

Using brush mode source

Create a geometry covering the volume that should be filled with the liquid.

Exclude this geometry from the interaction, by adding it in the simulator’s exclude list, or simply by hiding it.

Create a liquid source, and select Brush for the If not solid option.

Animate the discharge from 100 to 0 for the first two frames.

Disable the velocity checkbox of the liquid source helper.

Thanks

3

Hello,

If you want to fill up an object, just add it as a brush source and animated the brush effect from 100 to 0 for the first frames. That should be enough.

Another way of doing that is to right-click the object and from the Phoenix FD Properties to choose Initial Liquid Fill.

4

Thanks,
using the animated brush works (but not the phoenix property initial fill up).
But the box is fill up properly only on the the first frame (100% brush) but the sim cross the wall for all other frame (even with a 0.4 unit wall for 0.12 cell size).
I tried to check solid body in the phoenix property, but it doesn’t change anything.
I need to add a recipient that is 0.15 unit wall tick? What cell size will be or for that?
How can I avoid the sim to cross the wall?

Thanks

5

Can you post an example what are you trying to do and what is not working?

6

Hello, should I send the scene to support@chaosgroup.com?
Not sure that the demo can handle what I’m after, but I don’t want to go for rental license if it even doesn’t work on the demo version.
We spend some time together with sventlin on this thread, without much success:
https://forums.chaosgroup.com/showthread.php?92747-best-practice-for-CFD-simulation-rendering

Apart from my miss-usage of phoenix, the goal is to find the bridge between phoenix unit and real world unit, to get as close as possible to the real world. So the math doesn’t work. To make it short, I need 0.2l/s of discharge.
Due to the small thickness of my wall, I expect the demo version to be to short with 2M cell. But I don’t want to engage a rental license without being sure about the phoenix value vs real physical word value.

Thanks

7

Hi Fraggle

As I said in the other thread, if you are able to post the scene I can test for you.
If you can’t post the file publicly, you can private message me, I’ll see what I can do.

Cheers

8

Thanks Raven,
I really appreciate your proposal.
But first of all, I need to know that the value used are the right one.
If Phoenix can be physically tuned to real work physical scale, I will have more than just one simulation.
So this factor is really important for this project.

On top of that I’m link by an NDA, so I can’t share the file as I wish, I need to get the client authorization first. I formally get it for a chaos support while I’m not sure to be able to get it for a freelancer, that’s another reason why I’m trying to step away from traditonal CFD, because them I will have to hire somebody and get an authorization again…