Unit in Esys-particle

Asked by Wasin Meesuay on 2020-10-14

As I try to change some parameters in the shear cell simulation, like density and some geometry dimension, and found on some threads that 1 model units in Esys-particle is quite different from the real life measurement unit (like 1 model unit = 1 mm instead of 1 metre). So how can I know what is exactly a model unit equal to?? (so I could make the simulation to be equivalent to real world)

Thank you for advance kub :D
Wasin

Question information

Language:
English Edit question
Status:
Solved
For:
ESyS-Particle Edit question
Assignee:
No assignee Edit question
Solved by:
Dion Weatherley
Solved:
2020-10-15
Last query:
2020-10-15
Last reply:
2020-10-14
Best Dion Weatherley (d-weatherley) said : #1

Hi Wasin,

The issue of model units in ESyS-Particle has been addressed in a number of previous forum posts. I suggest you read these:
https://answers.launchpad.net/esys-particle/+question/85817
https://answers.launchpad.net/esys-particle/+question/632720
https://answers.launchpad.net/esys-particle/+question/552493

In short, ESyS-Particle does not assume any particular system of units. It is up to the user to decide which system of units you wish to use, then set the values of all physical properties/parameters according to your selected system of units. Make sure to always explicitly set the density of particles using LsmMpi.setParticleDensity(..) in your simulation scripts. Particle density is set equal to 1.0 by default. All other model parameters in ESyS-Particle have a default value of 0.0 and must be set correctly by the user during simulation setup.

Cheers,

Dion

Wasin Meesuay (kakkunno) said : #2

Thanks Dion Weatherley, that solved my question.