A boundary particle was excluded

Alvininorge

Hello,

I was trying to make a sloshing tank in DualSPHysics. Different from the example from youtube, the model was made with a rotating box with fluid inside. But the program kept giving me error message of "A boundary particle was excluded"

At first I thought it was because the box was outside the domain, but the message happens at the very first 0.01 sec or so that couldn't be the reason. Then I tried to make the box with recitlinear movement but the message popped out as usual.

Everything was fine if I take out the motion. I wonder if it is related the density range thing that gives error of "A fluid particle was excluded".

A bit puzzled, please enlighten me!

Jiafeng

Alex

http://dual.sphysics.org/index.php/forums/#10

Alvininorge

YES! I was able to track down a previous discussion http://dual.sphysics.org/vanilla/discussion/302/problem-with-moving-boundary-condition/p1 where you have already answered this question. But a problem left unanswered in that discussion:

When

MapPos(border)=(-0.145021,-0.545021,-0.025021)-(0.145021,0.545021,0.525021)

and my execution parameter is

-domain_fixed:-0.2,-0.7,-0.2,0.2,0.7,0.7

it says that "Domain limits is not valid"

I couldn't find any example of the correct format of domain_fixed and the description of -domain_particles and -domain_particles_prc looks a bit confusing, Could you give an example code of this part?

Thank you

Alvininorge

Just for contingency, I drew a larger box around the sloshing tank to solve the problem. But I am sure there should be a better way to do this.

Alex

Just use "drawpoint" to define two boundary points at the minimum and maximum positions that the particles are expected to reach during the simulation.

Regards

Alvininorge

That is smarter!

Alex

That is also explained in the FAQ!!!!

Alvininorge

That is also......true. Forgive my carelessness. But how does -domain_particles work if I want to use that? For example if I have a box(0,0,0)-(1,1,1), how to define the domain as(-1,-1,-1)-(2,2,2)? -domain_fixed:-1,-1,-1,2,2,2 doesn't work.

Thank you again for your patience.