Tips and Tricks: What Splash size domain do I need to put?

Hi all,

When you are rendering with the Job Manager, is good to create several splashes domain to simulate in different machines. If RealFlow is crashing for some node when simulating in the RF nodes, is due to the Splash domain is very huge to calculate the particles and some of them are making that RealFlow crash. There is a workaround to solve this. Only you have to apply this formula d<=125.992/Ѵr

where “d” is the distance for the splash domain, and “r” is the resolution for the splash you want to put.

For example, if you want to put a resolution “r” of 200 for your splashes it would be sqrt(200) = 14,14.

d<= 125.992/14,14, d<= 8,91. It means that the splash should be of 12.59 scale for XYZ, assuming it is a cubic splash domain.

In order to create the splashes we are going to create IDOCS selecting the GridFluidDomain. Next, we’ll put a splash for IDOC selecting the Splash_for_IDOC icon. Creating a good splash to use with the job manager, will do the splash or particles simulation faster😉

luisM.

10 comments

  1. Hi Luis,
    I’ve tried to understand your formula – but it seems that I can’t get it.

    I don’t understand the distance parameter – between which elements is that measured?

    Thanks,
    Andrea

    1. Hi Andrea,

      the formula says d <= 125.992/Vr. It means if you have a resolution of 100, for example, for your gridfluiddomain the V100 (sqrt 100) = 10. If you make the operation 125.992/100 = 12.5992 means you'll need that maximum size for your bounding box splashes to avoid a possible crash. Now, you select the GridFluidDomain and create multiple IDOCS with keeping in mind that size. Once you have placed the IDOCS you can create a splash per IDOC and you'll have your splashes for your scene. If you are going to simulate the splash in a single machine, you can remove all IDOC nodes because won't be necessaries.

      luisM.

  2. Hi Luis,
    i’ve just started learning Realflow for liquid simulations and have two essential questions for you. Would you be able to answer them?
    1) how do you clear the messages in GREEN? (on the top left of your view port, the picture in this post has it)
    2) other than doing a print-screen, is there a way to do a high quality image export? say in a 1900×1200 bmp or jpg file?

    MANY MANY THANKS!
    Adriel

    1. Hi Adriel,

      Welcome to the fluid world🙂

      I answer your questions.

      1) You need to go to the menu file>Preferences>Display>Display Info. Select None if you don’t want anything, Selected nodes or All Nodes.

      2) I don’t understand very well this question. Do you mean displacement maps, wet texture maps or simply you want to capture the screen? If it is only to capture the screen, your monitor must be able to have that resolution. For displacement maps or wet textures you’ll need to get the map size in the realflow parameters.

      I hope it helps.

      luisM.

  3. hola luis,
    Recién estoy usando la versión 2012, y noto que muchos parámetros han cambiado con respecto a la versión 5, de hecho tengo problemas al momento de añadir Splash, he revisado la escena del cocodrilo que tienes y me ha presentado el mismo problema al momento de simular el Splash las partículas se generan incluso antes que colisione el liquido y se emiten básicamente desde el borde del contenedor, no reaccionan incluso al KVolume. Para resolver esto he tenido que añadir varios Daemos, como KAge y KVelocity, no hay alguna forma mas sencilla como en la version anterior? Gracias, excelente trabajo sigue así

    1. El Splash tiene un parametro que es “bounded”. Por defecto esta activado y muestra una caja donde se creara el splash. Si esa caja abarca todo el fluido, los splashes se crearan para todo el dominio. Eso funciona igual en RF5. Con respecto al Kvolume, es raro, pero echa un ojo a ver si no lo tienes linkado correctamente o si tienes el inverse del Kvolume mal. Una cosa muy importante tambien es usar exclusive links. Espero que te sirva.

      The Splash has a “Bounded” parameter. It is activated by default and shows a green bounding box to limit where you want the splashes. It is workingmin the same way that the RF5 did. About the Kvolume, you should check if you have correctly linked with the Domain or if the “Inverse” parameter is wrong. A very important thing with Hybrido scenes will be to use the Exclusive Links. I hope it helps.

      luisM.

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