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[Robert Caulk <question692194@xxxxxxxxxxxxxxxxxxxxx>]

Question #692194 on Yade changed:
https://answers.launchpad.net/yade/+question/692194

    Status: Open => Answered

Robert Caulk proposed the following answer:
Hey Jiannan,

>If I decrease the time step more, the computing time would be
astronomically increase.

Thanks for testing the stability. The most sensitive scheme you are
currently using is the fluidConduction scheme, especially if you have
fluid cells whose "centers" are on top of one another (not uncommon in
typical triangulations for distributed particle sizes). So consider what
happens to the thermal resistivity between two fluid cells when the
distance between them goes to 0. That is an important point to
understand if you wish to understand the stability of the system.

The current way to "stabilize" these edge cases without decreasing the
time step is to limit the allowed distance between cells, thus
preventing the infinite thermal resistance between cells. Practically it
is called thermal.minimumFluidCondDist [1].

Cheers,

Robert


https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.ThermalEngine.minimumFluidCondDist

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