Learning Forum

[Otokemo]

Hello, I'm trying to collide the cylinder (material:water) to the net.

I'm using SPH approach, but the net elements are very thin and they go between the the particles and has no effect on the net geometry.

 

I also tried Lagrangian approach with Explicit and Ls-Dyna as well. 

With the Explicit, the water cylinder elements are distorting and I'm getting energy error too big error.

With the Ls-Dyna, the water cylinder doesn't go throu the net, it just kinda bounces back.

Any ideas?

 

[Ram Gopisetti]

Hi Otokemo, 

Have you used any  nodes_to_surface contact between SPH ( MAT_NULL+EOS)and Beams with adjusted penalty factors for contact to be detectable with a very fine particle count ( at least three or more particles covering the beam elements to get collisions)  with this approach, you might get something like follows:

I do not suggest to use solid elements here to represent the fluid part,  You can try with the solid net elements and see how it goes.  

Cheers, Ram 

[Otokemo]

 

Dear Ram, thank you for your reply. 
I’m using LS-Dyna in from workbench and I can’t find how to apply  nodes_to_surface contact.
Is it only used in standalone LS-Dyna?

Also, water2 material from Explicit materials, already has EOS defined, I added MAT_NULL, but which parameters should I use?

Cheers,

Oto