Jump to content
  • Announcements

    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 
    • Rahul Ponginan

      Introduction to Explicit Analysis using RADIOSS.   11/02/17

      We are excited to announce the release of updated RADIOSS ebook, Introduction to Explicit Analysis using RADIOSS. We have added new tutorials, more FAQ's....etc with more topics covered. This study guide aims to provide a good introduction into the exciting and challenging world of explicit Finite Element Analysis.
      You can download the updated RADIOSS ebook here: Introduction to Explicit Analysis using RADIOSS                                                           

SPH formulation - box deformation

Recommended Posts

Hello Everybody,

I'm trying  to use SPH Method with Radioss. 

I would like to determinate the deformation of a box full of water. I've modeled  SPH Particles of water as simple cubic and I've used interface type 7 between water and box. Loads: lock of the base of box and gravity load to water particles. The simulation run without error but results are different than expected: pressure is not uniformly distributed becuase particles don't mantain the initial pitch.

What is the error?

In attach the .hm file.


Could someone help me, please?

Thanks in advance.


Share this post

Link to post
Share on other sites

Hi Marta,

I ran your model. This is the expected behavior of the model for this loading condition. Since you are loading the created SPH particles, it will fall down to the bottom of the box and the pitch will not be maintained. I have attached the h3d file of the run.

Are you looking for a continuous flow of SPH particles?. Please see the attached gif file showing the continuous flow of SPH particles, where the pitch of particles in maintained.





Share this post

Link to post
Share on other sites

Hi George, 

I'm very thankful for your replay!

No, I'm actually not looking for a continuos flow; I used the SPH method for meshing water, because I want to see the deformation of a box full of liquid.

I think an alternative solution could be to apply a variable pressure inside the box, increasing with depth and applied to different contact surface (see the fig. attach), but I'd like to try the SPC method, if it is possible.

So I need that the particles mantain their pitch and employ pressure on box's wall.

Any suggestion?


Thanks a lot


Share this post

Link to post
Share on other sites

Hi George, 

thank you very much for your suggestion.

A last question: how can I see the particles  not like point but big, like in your gif?



Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now