Question #689592 on Yade changed:
https://answers.launchpad.net/yade/+question/689592
Status: Open => Answered
Jérôme Duriez proposed the following answer:
Hi,
I understand you're happy with your first, calibration, comparisons, and
unhappy with your second, validation, comparisons. It "just" means the
blind-prediction capabilities of your (DEM) model are somewhat deceiving
for you, even though the model could be tuned to correctly reflect a
real observation in the first place. That is a quite common situation
for honest scientists...
You probably do not have much choice from there.
Either you lower your expectations, or you change your model (particle's shape
or contact laws or everything that could contribute to a discrepancy between
the real and DEM worlds).
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