GeoXPM output tutorial - General

RE: GeoXPM output tutorial

Tien Nguyen (Smith) — Tue, 20 Jan 2026 01:56:21 +0000

@madelestin You can find the real-time output in the file Run.out, located in the project’s _out folder.

RE: GeoXPM output tutorial

madelestin — Wed, 31 Dec 2025 11:17:11 +0000

@tienlk2004 thank you for the recommendation

I would like to ask as well is it possible from the GeoXPM to give out the running time it takes to complete the simulation?

RE: GeoXPM output tutorial

Tien Nguyen (Smith) — Mon, 10 Nov 2025 03:36:47 +0000

@Madelestin “Plot Over Line” won’t work if the particle centers aren’t exactly on the line (which is almost always the case).

Instead, you should use “Select Points On”, then “Plot Over Time” for the stress data of that point.

Another option is to use volume averaging or SPH kernel approximation (via the SPH Line Interpolator filter). These methods are similar to “Plot Over Line,” but instead of sampling only along the line, they expand the sampling volume and perform averaging.

RE: GeoXPM output tutorial

madelestin — Sun, 26 Oct 2025 11:04:56 +0000

@tienlk2004 hi i would like to ask is there a tutorial to plot the chart of stress vs time? because i cant seem to find it and plot over line results in nothing

RE: GeoXPM output tutorial

Tien Nguyen (Smith) — Sat, 05 Jul 2025 03:18:05 +0000

@madelestin timestep is dynamic based on material properties. You will see the timestep printed on the output log when running the simulation. Else you can find the log where you save the project in _out folder Run.out file (open with any text editor)

I suggest you read one of the paper in the reference page. The formulation for calculating the timestep together with other equations and parameters for SPH is there

RE: GeoXPM output tutorial

madelestin — Sat, 05 Jul 2025 02:55:14 +0000

@tienlk2004 does a timestep of dt is always of 0.001 s or I can change it based on the critical timestep factor?

RE: GeoXPM output tutorial

Tien Nguyen (Smith) — Sat, 05 Jul 2025 02:19:11 +0000

@madelestin As I mentioned, it's based on iterations, not seconds. If you set the output interval to 200 and run for 3600 steps, you’ll get 17 frames, each spaced 200 iterations apart.
With a timestep of dt = 0.001s, each frame represents a 0.2-second interval. So by frame 17, the simulation time is 3.6 seconds (Paraview counts frame from 0)

You can get the timestep dt from the output log

RE: GeoXPM output tutorial

madelestin — Sat, 05 Jul 2025 01:42:32 +0000

@tienlk2004 so to be confirmed, if i put the iteration as 3600 steps, so the output is 17 frames each representing 1 second? or 200 second?

Because i would like to know the impact of time for the model

RE: GeoXPM output tutorial

Tien Nguyen (Smith) — Sat, 05 Jul 2025 00:15:22 +0000

@madelestin both the stage and the time of output are in iterations. If you output every 200 steps then you have 17 frames for 3600 steps. To get the real time you have to multiply the iterations with timestep (dt)

RE: GeoXPM output tutorial

madelestin — Fri, 04 Jul 2025 09:27:09 +0000

@tienlk2004 Hi, sorry I would like to ask again

As for the output, it gives different time stamp as in stages. whereas in geoxpm in the stages, the time of simulation was stated in seconds. How about in the output? because the time steps are different, I tried to put 1 hour (3600 s) and the output is only 17 time

time-output.png