Particles Out of Simulation - Density Diffusion Option 3 (Fourtakas 2020)
Summary: Used New Density Diffusion Option 3, around 4% particles out of the simulation, want to know whether pressure -> force evaluations are reliable from such a simulation?
I am running a simulation where a body is moving inside a fluid domain (with Chrono hinge). As I was working with different options, I set Density Diffusion Delta to Option 3 - (where it is applied to both fluid-fluid and fluid-body interaction)
I got a warning
*** WARNING: It is advised that selected DDT: 'Fourtakas et al 2019 (full)' is used with several boundary layers of particles when h/dp>1.5 (2h <= layers*Dp)
I did not think that much of it as the simulation ran successfully and I got my force output, with a little high frequency noise.
However, I was looking at the run.out file and noticed that a number of particles are out of the system
In the end, a little over 4% of total particles were out.
I am wondering about why these particles are out of the system and how much it will influence the pressure, and thereby force outputs?
I have attached the run.out file
Finally, I have fixed the issue using a multilayered boundary as suggested by the warning. Since each simulation takes a while to run, I want to know
if I have to re run all of them?
@Asalih3d have you looked at this option before?