hybrido - simulating body of liquid with object in it

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hmercado
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Joined: Sat Jan 10, 2015 2:48 am

hybrido - simulating body of liquid with object in it

Post by hmercado » Fri Feb 27, 2015 4:30 pm

Hello,

I am trying to fill a hybrido container with an object standing in the middle of the container that will later break apart an fall on the liquid to create splashes.

My first thought was to set an emitter to stream to fill the container so it flows around the object and let it settle down before starting the object animation breaking up and falling down but that takes a lot of time to simulate and huge amount of disk space (specially after increasing the resolution) just to get the initial state I need :roll:

Any tips and advice to what would be the proper way to handle this kind of sim?

Thank you.

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LuisMiguel
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Joined: Fri Jun 04, 2010 2:37 pm

Re: hybrido - simulating body of liquid with object in it

Post by LuisMiguel » Mon Mar 02, 2015 9:12 am

Hey,

Have you tried to create Closed Domain?. You can scale down the emitter and place it in any place you want inside the container. Once it is placed you can animate the gravity so you can control the fluid and when you want it will start to fall down.

I hope it helps.

luisM.

hmercado
Posts: 38
Joined: Sat Jan 10, 2015 2:48 am

Re: hybrido - simulating body of liquid with object in it

Post by hmercado » Mon Mar 02, 2015 4:45 pm

Hi Luis,

Yes I am using a closed domain.
What I need is to simulate a container filled with liquid and let it settle down to have a calm liquid surface before I let an object fall down into the liquid.
I have the object pre fractured, animated and imported as sd file. But the object is sitting in the middle of the fluid before it collapses down into the fluid.

I have been running the simulation to let the liquid fill the container and settle down, but since its such a long process, I was just wondering if there would be a better way to do this.
I just though maybe I could fill the volume and animate the object slowly moving down into position inside the fluid and maybe that way the fluid will come to rest faster.
Any ideas are welcome.

Thank you.

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LuisMiguel
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Re: hybrido - simulating body of liquid with object in it

Post by LuisMiguel » Wed Mar 04, 2015 4:42 pm

Hi,

Can you show me a screenshot what you want to do?. is the fluid into in a geometry different a box?.

luisM.

hmercado
Posts: 38
Joined: Sat Jan 10, 2015 2:48 am

Re: hybrido - simulating body of liquid with object in it

Post by hmercado » Wed Mar 04, 2015 5:22 pm

Hola Luis,

Puede ser en español nos entendemos mejor? ;)
En este link puedes ver un preview de la escena: http://www.hamercado.com/realflow/preview.mp4
Verás que tengo un objeto dentro del hybrido que luego se desmorona callendo dentro del líquido; eso era lo que te explicaba anteriormente.
después de un par de dias simulando he conseguido asentar el liquido para tener la superficie en reposo antes de que caigan los pedazos.

El problema que tengo ahora, como puedes ver en el video, es que cuando intento continuar la simulación desde el último frame que tenia simulado (frame 125), como me dijiste en el otro post, usando el arg Use cache, me estaba simulando el siguiente frame (126) correctamente pero luego en el frame 127 el total de partículas baja de 3 millones que tenia a solo 3mil y luego desaparecen :roll:
El último intento de continuar la simulación desde el frame 126 me dió este mensaje: http://www.hamercado.com/realflow/hybrido-mensaje.jpg y sigue igual aún después de aumentar el Max iterations de 1000 a 2000 y a 3000

Alguna forma de resolver eso?

Gracias

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LuisMiguel
Posts: 528
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Re: hybrido - simulating body of liquid with object in it

Post by LuisMiguel » Mon Mar 09, 2015 10:15 am

Hey,

Te lo explico en ingles por si alguien tiene tu mismo problema. ;)

That is because the geometries are not voxelizing properly. If you try to show the Display Volume for your geometry, you'll see a lot of artifacts in it. It is because of fracture softwares, if you did a prefracture with an external 3d software for your geometry, or the fracture tool inside RealFlow itself. In RealFlow 2015 there will be a very fast robust mode to avoid this kind of issues, but for now, you would need to fix the geometry or try to select the geometry as Volume mode "Shell" instead "Inside".

luisM.

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